<?xml version="1.0" encoding="utf-8"?>
<database title="Open vSwitch Configuration Database">
- <p>A database with this schema holds the configuration for one Open
- vSwitch daemon. The root of the configuration for the daemon is
- the <ref table="Open_vSwitch"/> table, which must have exactly one
+ <p>
+ A database with this schema holds the configuration for one Open
+ vSwitch daemon. The top-level configuration for the daemon is the
+ <ref table="Open_vSwitch"/> table, which must have exactly one
record. Records in other tables are significant only when they
- can be reached directly or indirectly from the
- <ref table="Open_vSwitch"/> table.</p>
+ can be reached directly or indirectly from the <ref
+ table="Open_vSwitch"/> table. Records that are not reachable from
+ the <ref table="Open_vSwitch"/> table are automatically deleted
+ from the database, except for records in a few distinguished
+ ``root set'' tables.
+ </p>
+
+ <h2>Common Columns</h2>
+
+ <p>
+ Most tables contain two special columns, named <code>other_config</code>
+ and <code>external_ids</code>. These columns have the same form and
+ purpose each place that they appear, so we describe them here to save space
+ later.
+ </p>
+
+ <dl>
+ <dt><code>other_config</code>: map of string-string pairs</dt>
+ <dd>
+ <p>
+ Key-value pairs for configuring rarely used features. Supported keys,
+ along with the forms taken by their values, are documented individually
+ for each table.
+ </p>
+ <p>
+ A few tables do not have <code>other_config</code> columns because no
+ key-value pairs have yet been defined for them.
+ </p>
+ </dd>
+
+ <dt><code>external_ids</code>: map of string-string pairs</dt>
+ <dd>
+ Key-value pairs for use by external frameworks that integrate with Open
+ vSwitch, rather than by Open vSwitch itself. System integrators should
+ either use the Open vSwitch development mailing list to coordinate on
+ common key-value definitions, or choose key names that are likely to be
+ unique. In some cases, where key-value pairs have been defined that are
+ likely to be widely useful, they are documented individually for each
+ table.
+ </dd>
+ </dl>
<table name="Open_vSwitch" title="Open vSwitch configuration.">
- Configuration for an Open vSwitch daemon. There must be exactly one record
- in the <ref table="Open_vSwitch"/> table.
+ Configuration for an Open vSwitch daemon. There must be exactly
+ one record in the <ref table="Open_vSwitch"/> table.
<group title="Configuration">
<column name="bridges">
SSL used globally by the daemon.
</column>
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate
- with Open vSwitch, rather than by Open vSwitch itself. System
- integrators should either use the Open vSwitch development
- mailing list to coordinate on common key-value definitions, or
- choose key names that are likely to be unique. The currently
- defined common key-value pairs are:
- <dl>
- <dt><code>system-type</code></dt>
- <dd>An identifier for the switch type, such as
- <code>XenServer</code> or <code>KVM</code>.</dd>
- <dt><code>system-version</code></dt>
- <dd>The version of the switch software, such as
- <code>5.6.0</code> on XenServer.</dd>
- <dt><code>system-id</code></dt>
- <dd>A unique identifier for the Open vSwitch's physical host.
- The form of the identifier depends on the type of the host.
- On a Citrix XenServer, this will likely be the same as
- <code>xs-system-uuid</code>.</dd>
- <dt><code>xs-system-uuid</code></dt>
- <dd>The Citrix XenServer universally unique identifier for the
- physical host as displayed by <code>xe host-list</code>.</dd>
- </dl>
+ <column name="external_ids" key="system-id">
+ A unique identifier for the Open vSwitch's physical host.
+ The form of the identifier depends on the type of the host.
+ On a Citrix XenServer, this will likely be the same as
+ <ref column="external_ids" key="xs-system-uuid"/>.
+ </column>
+
+ <column name="external_ids" key="xs-system-uuid">
+ The Citrix XenServer universally unique identifier for the physical
+ host as displayed by <code>xe host-list</code>.
</column>
</group>
configuration changes.
</column>
- <column name="capabilities">
- Describes functionality supported by the hardware and software platform
- on which this Open vSwitch is based. Clients should not modify this
- column. See the <ref table="Capability"/> description for defined
- capability categories and the meaning of associated
- <ref table="Capability"/> records.
- </column>
-
- <column name="statistics">
+ <group title="Statistics">
<p>
- Key-value pairs that report statistics about a system running an Open
- vSwitch. These are updated periodically (currently, every 5
- seconds). Key-value pairs that cannot be determined or that do not
- apply to a platform are omitted.
+ The <code>statistics</code> column contains key-value pairs that
+ report statistics about a system running an Open vSwitch. These are
+ updated periodically (currently, every 5 seconds). Key-value pairs
+ that cannot be determined or that do not apply to a platform are
+ omitted.
</p>
- <dl>
- <dt><code>cpu</code></dt>
- <dd>
- <p>
- Number of CPU processors, threads, or cores currently online and
- available to the operating system on which Open vSwitch is
- running, as an integer. This may be less than the number
- installed, if some are not online or if they are not available to
- the operating system.
- </p>
- <p>
- Open vSwitch userspace processes are not multithreaded, but the
- Linux kernel-based datapath is.
- </p>
- </dd>
-
- <dt><code>load_average</code></dt>
- <dd>
- <p>
- A comma-separated list of three floating-point numbers,
- representing the system load average over the last 1, 5, and 15
- minutes, respectively.
- </p>
- </dd>
+ <column name="other_config" key="enable-statistics"
+ type='{"type": "boolean"}'>
+ Statistics are disabled by default to avoid overhead in the common
+ case when statistics gathering is not useful. Set this value to
+ <code>true</code> to enable populating the <ref column="statistics"/>
+ column or to <code>false</code> to explicitly disable it.
+ </column>
- <dt><code>memory</code></dt>
- <dd>
- <p>
- A comma-separated list of integers, each of which represents a
- quantity of memory in kilobytes that describes the operating
- system on which Open vSwitch is running. In respective order,
- these values are:
- </p>
+ <column name="statistics" key="cpu"
+ type='{"type": "integer", "minInteger": 1}'>
+ <p>
+ Number of CPU processors, threads, or cores currently online and
+ available to the operating system on which Open vSwitch is running,
+ as an integer. This may be less than the number installed, if some
+ are not online or if they are not available to the operating
+ system.
+ </p>
+ <p>
+ Open vSwitch userspace processes are not multithreaded, but the
+ Linux kernel-based datapath is.
+ </p>
+ </column>
- <ol>
- <li>Total amount of RAM allocated to the OS.</li>
- <li>RAM allocated to the OS that is in use.</li>
- <li>RAM that can be flushed out to disk or otherwise discarded
- if that space is needed for another purpose. This number is
- necessarily less than or equal to the previous value.</li>
- <li>Total disk space allocated for swap.</li>
- <li>Swap space currently in use.</li>
- </ol>
+ <column name="statistics" key="load_average">
+ A comma-separated list of three floating-point numbers,
+ representing the system load average over the last 1, 5, and 15
+ minutes, respectively.
+ </column>
- <p>
- On Linux, all five values can be determined and are included. On
- other operating systems, only the first two values can be
- determined, so the list will only have two values.
- </p>
- </dd>
+ <column name="statistics" key="memory">
+ <p>
+ A comma-separated list of integers, each of which represents a
+ quantity of memory in kilobytes that describes the operating
+ system on which Open vSwitch is running. In respective order,
+ these values are:
+ </p>
+
+ <ol>
+ <li>Total amount of RAM allocated to the OS.</li>
+ <li>RAM allocated to the OS that is in use.</li>
+ <li>RAM that can be flushed out to disk or otherwise discarded
+ if that space is needed for another purpose. This number is
+ necessarily less than or equal to the previous value.</li>
+ <li>Total disk space allocated for swap.</li>
+ <li>Swap space currently in use.</li>
+ </ol>
+
+ <p>
+ On Linux, all five values can be determined and are included. On
+ other operating systems, only the first two values can be
+ determined, so the list will only have two values.
+ </p>
+ </column>
- <dt><code>process_</code><var>name</var></dt>
- <dd>
- <p>
- One such key-value pair will exist for each running Open vSwitch
- daemon process, with <var>name</var> replaced by the daemon's
- name (e.g. <code>process_ovs-vswitchd</code>). The value is a
- comma-separated list of integers. The integers represent the
- following, with memory measured in kilobytes and durations in
- milliseconds:
- </p>
+ <column name="statistics" key="process_NAME">
+ <p>
+ One such key-value pair, with <code>NAME</code> replaced by
+ a process name, will exist for each running Open vSwitch
+ daemon process, with <var>name</var> replaced by the
+ daemon's name (e.g. <code>process_ovs-vswitchd</code>). The
+ value is a comma-separated list of integers. The integers
+ represent the following, with memory measured in kilobytes
+ and durations in milliseconds:
+ </p>
+
+ <ol>
+ <li>The process's virtual memory size.</li>
+ <li>The process's resident set size.</li>
+ <li>The amount of user and system CPU time consumed by the
+ process.</li>
+ <li>The number of times that the process has crashed and been
+ automatically restarted by the monitor.</li>
+ <li>The duration since the process was started.</li>
+ <li>The duration for which the process has been running.</li>
+ </ol>
+
+ <p>
+ The interpretation of some of these values depends on whether the
+ process was started with the <option>--monitor</option>. If it
+ was not, then the crash count will always be 0 and the two
+ durations will always be the same. If <option>--monitor</option>
+ was given, then the crash count may be positive; if it is, the
+ latter duration is the amount of time since the most recent crash
+ and restart.
+ </p>
+
+ <p>
+ There will be one key-value pair for each file in Open vSwitch's
+ ``run directory'' (usually <code>/var/run/openvswitch</code>)
+ whose name ends in <code>.pid</code>, whose contents are a
+ process ID, and which is locked by a running process. The
+ <var>name</var> is taken from the pidfile's name.
+ </p>
+
+ <p>
+ Currently Open vSwitch is only able to obtain all of the above
+ detail on Linux systems. On other systems, the same key-value
+ pairs will be present but the values will always be the empty
+ string.
+ </p>
+ </column>
- <ol>
- <li>The process's virtual memory size.</li>
- <li>The process's resident set size.</li>
- <li>The amount of user and system CPU time consumed by the
- process.</li>
- <li>The number of times that the process has crashed and been
- automatically restarted by the monitor.</li>
- <li>The duration since the process was started.</li>
- <li>The duration for which the process has been running.</li>
- </ol>
+ <column name="statistics" key="file_systems">
+ <p>
+ A space-separated list of information on local, writable file
+ systems. Each item in the list describes one file system and
+ consists in turn of a comma-separated list of the following:
+ </p>
+
+ <ol>
+ <li>Mount point, e.g. <code>/</code> or <code>/var/log</code>.
+ Any spaces or commas in the mount point are replaced by
+ underscores.</li>
+ <li>Total size, in kilobytes, as an integer.</li>
+ <li>Amount of storage in use, in kilobytes, as an integer.</li>
+ </ol>
+
+ <p>
+ This key-value pair is omitted if there are no local, writable
+ file systems or if Open vSwitch cannot obtain the needed
+ information.
+ </p>
+ </column>
+ </group>
+ </group>
- <p>
- The interpretation of some of these values depends on whether the
- process was started with the <option>--monitor</option>. If it
- was not, then the crash count will always be 0 and the two
- durations will always be the same. If <option>--monitor</option>
- was given, then the crash count may be positive; if it is, the
- latter duration is the amount of time since the most recent crash
- and restart.
- </p>
+ <group title="Version Reporting">
+ <p>
+ These columns report the types and versions of the hardware and
+ software running Open vSwitch. We recommend in general that software
+ should test whether specific features are supported instead of relying
+ on version number checks. These values are primarily intended for
+ reporting to human administrators.
+ </p>
- <p>
- There will be one key-value pair for each file in Open vSwitch's
- ``run directory'' (usually <code>/var/run/openvswitch</code>)
- whose name ends in <code>.pid</code>, whose contents are a
- process ID, and which is locked by a running process. The
- <var>name</var> is taken from the pidfile's name.
- </p>
+ <column name="ovs_version">
+ The Open vSwitch version number, e.g. <code>1.1.0</code>.
+ </column>
- <p>
- Currently Open vSwitch is only able to obtain all of the above
- detail on Linux systems. On other systems, the same key-value
- pairs will be present but the values will always be the empty
- string.
- </p>
- </dd>
+ <column name="db_version">
+ <p>
+ The database schema version number in the form
+ <code><var>major</var>.<var>minor</var>.<var>tweak</var></code>,
+ e.g. <code>1.2.3</code>. Whenever the database schema is changed in
+ a non-backward compatible way (e.g. deleting a column or a table),
+ <var>major</var> is incremented. When the database schema is changed
+ in a backward compatible way (e.g. adding a new column),
+ <var>minor</var> is incremented. When the database schema is changed
+ cosmetically (e.g. reindenting its syntax), <var>tweak</var> is
+ incremented.
+ </p>
- <dt><code>file_systems</code></dt>
- <dd>
- <p>
- A space-separated list of information on local, writable file
- systems. Each item in the list describes one file system and
- consists in turn of a comma-separated list of the following:
- </p>
+ <p>
+ The schema version is part of the database schema, so it can also be
+ retrieved by fetching the schema using the Open vSwitch database
+ protocol.
+ </p>
+ </column>
- <ol>
- <li>Mount point, e.g. <code>/</code> or <code>/var/log</code>.
- Any spaces or commas in the mount point are replaced by
- underscores.</li>
- <li>Total size, in kilobytes, as an integer.</li>
- <li>Amount of storage in use, in kilobytes, as an integer.</li>
- </ol>
+ <column name="system_type">
+ <p>
+ An identifier for the type of system on top of which Open vSwitch
+ runs, e.g. <code>XenServer</code> or <code>KVM</code>.
+ </p>
+ <p>
+ System integrators are responsible for choosing and setting an
+ appropriate value for this column.
+ </p>
+ </column>
- <p>
- This key-value pair is omitted if there are no local, writable
- file systems or if Open vSwitch cannot obtain the needed
- information.
- </p>
- </dd>
- </dl>
+ <column name="system_version">
+ <p>
+ The version of the system identified by <ref column="system_type"/>,
+ e.g. <code>5.6.100-39265p</code> on XenServer 5.6.100 build 39265.
+ </p>
+ <p>
+ System integrators are responsible for choosing and setting an
+ appropriate value for this column.
+ </p>
</column>
+
</group>
<group title="Database Configuration">
connection should be configured. See the <ref table="Manager"/> table
for more information.
</column>
+ </group>
- <column name="managers">
- <p>
- Remote database clients to which the Open vSwitch's database server
- should connect or to which it should listen. Adding an OVSDB target
- to this set is equivalent to adding it to <ref
- column="manager_options"/> with all of the default options.
- </p>
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
- <p>
- Use of this column is deprecated and may be removed sometime in the
- future. New applications should use and set <ref
- column="manager_options"/> instead.
- </p>
- </column>
+ <column name="other_config"/>
+ <column name="external_ids"/>
</group>
</table>
</column>
<column name="flood_vlans">
- VLAN IDs of VLANs on which MAC address learning should be disabled, so
- that packets are flooded instead of being sent to specific ports that
- are believed to contain packets' destination MACs. This should
- ordinarily be used to disable MAC learning on VLANs used for mirroring
- (RSPAN VLANs). It may also be useful for debugging.
+ <p>
+ VLAN IDs of VLANs on which MAC address learning should be disabled,
+ so that packets are flooded instead of being sent to specific ports
+ that are believed to contain packets' destination MACs. This should
+ ordinarily be used to disable MAC learning on VLANs used for
+ mirroring (RSPAN VLANs). It may also be useful for debugging.
+ </p>
+ <p>
+ SLB bonding (see the <ref table="Port" column="bond_mode"/> column in
+ the <ref table="Port"/> table) is incompatible with
+ <code>flood_vlans</code>. Consider using another bonding mode or
+ a different type of mirror instead.
+ </p>
</column>
</group>
<group title="OpenFlow Configuration">
<column name="controller">
- OpenFlow controller set. If unset, then no OpenFlow controllers
- will be used.
+ <p>
+ OpenFlow controller set. If unset, then no OpenFlow controllers
+ will be used.
+ </p>
+
+ <p>
+ If there are primary controllers, removing all of them clears the
+ flow table. If there are no primary controllers, adding one also
+ clears the flow table. Other changes to the set of controllers, such
+ as adding or removing a service controller, adding another primary
+ controller to supplement an existing primary controller, or removing
+ only one of two primary controllers, have no effect on the flow
+ table.
+ </p>
+ </column>
+
+ <column name="flow_tables">
+ Configuration for OpenFlow tables. Each pair maps from an OpenFlow
+ table ID to configuration for that table.
</column>
<column name="fail_mode">
<p>When a controller is configured, it is, ordinarily, responsible
- for setting up all flows on the switch. Thus, if the connection to
- the controller fails, no new network connections can be set up.
- If the connection to the controller stays down long enough,
- no packets can pass through the switch at all. This setting
- determines the switch's response to such a situation. It may be set
- to one of the following:
- <dl>
- <dt><code>standalone</code></dt>
- <dd>If no message is received from the controller for three
- times the inactivity probe interval
- (see <ref column="inactivity_probe"/>), then Open vSwitch
- will take over responsibility for setting up flows. In
- this mode, Open vSwitch causes the bridge to act like an
- ordinary MAC-learning switch. Open vSwitch will continue
- to retry connecting to the controller in the background
- and, when the connection succeeds, it will discontinue its
- standalone behavior.</dd>
- <dt><code>secure</code></dt>
- <dd>Open vSwitch will not set up flows on its own when the
- controller connection fails or when no controllers are
- defined. The bridge will continue to retry connecting to
- any defined controllers forever.</dd>
- </dl>
- </p>
- <p>If this value is unset, the default is implementation-specific.</p>
- <p>When more than one controller is configured,
- <ref column="fail_mode"/> is considered only when none of the
- configured controllers can be contacted.</p>
+ for setting up all flows on the switch. Thus, if the connection to
+ the controller fails, no new network connections can be set up.
+ If the connection to the controller stays down long enough,
+ no packets can pass through the switch at all. This setting
+ determines the switch's response to such a situation. It may be set
+ to one of the following:
+ <dl>
+ <dt><code>standalone</code></dt>
+ <dd>If no message is received from the controller for three
+ times the inactivity probe interval
+ (see <ref column="inactivity_probe"/>), then Open vSwitch
+ will take over responsibility for setting up flows. In
+ this mode, Open vSwitch causes the bridge to act like an
+ ordinary MAC-learning switch. Open vSwitch will continue
+ to retry connecting to the controller in the background
+ and, when the connection succeeds, it will discontinue its
+ standalone behavior.</dd>
+ <dt><code>secure</code></dt>
+ <dd>Open vSwitch will not set up flows on its own when the
+ controller connection fails or when no controllers are
+ defined. The bridge will continue to retry connecting to
+ any defined controllers forever.</dd>
+ </dl>
+ </p>
+ <p>
+ The default is <code>standalone</code> if the value is unset, but
+ future versions of Open vSwitch may change the default.
+ </p>
+ <p>
+ The <code>standalone</code> mode can create forwarding loops on a
+ bridge that has more than one uplink port unless STP is enabled. To
+ avoid loops on such a bridge, configure <code>secure</code> mode or
+ enable STP (see <ref column="stp_enable"/>).
+ </p>
+ <p>When more than one controller is configured,
+ <ref column="fail_mode"/> is considered only when none of the
+ configured controllers can be contacted.</p>
+ <p>
+ Changing <ref column="fail_mode"/> when no primary controllers are
+ configured clears the flow table.
+ </p>
</column>
<column name="datapath_id">
- Reports the OpenFlow datapath ID in use. Exactly 16 hex
- digits. (Setting this column will have no useful effect. Set
- <ref column="other_config"/>:<code>other-config</code>
- instead.)
+ Reports the OpenFlow datapath ID in use. Exactly 16 hex digits.
+ (Setting this column has no useful effect. Set <ref
+ column="other-config" key="datapath-id"/> instead.)
+ </column>
+
+ <column name="other_config" key="datapath-id">
+ Exactly 16 hex digits to set the OpenFlow datapath ID to a specific
+ value. May not be all-zero.
+ </column>
+
+ <column name="other_config" key="disable-in-band"
+ type='{"type": "boolean"}'>
+ If set to <code>true</code>, disable in-band control on the bridge
+ regardless of controller and manager settings.
+ </column>
+
+ <column name="other_config" key="in-band-queue"
+ type='{"type": "integer", "minInteger": 0, "maxInteger": 4294967295}'>
+ A queue ID as a nonnegative integer. This sets the OpenFlow queue ID
+ that will be used by flows set up by in-band control on this bridge.
+ If unset, or if the port used by an in-band control flow does not have
+ QoS configured, or if the port does not have a queue with the specified
+ ID, the default queue is used instead.
+ </column>
+ </group>
+
+ <group title="Spanning Tree Configuration">
+ The IEEE 802.1D Spanning Tree Protocol (STP) is a network protocol
+ that ensures loop-free topologies. It allows redundant links to
+ be included in the network to provide automatic backup paths if
+ the active links fails.
+
+ <column name="stp_enable">
+ Enable spanning tree on the bridge. By default, STP is disabled
+ on bridges. Bond, internal, and mirror ports are not supported
+ and will not participate in the spanning tree.
+ </column>
+
+ <column name="other_config" key="stp-system-id">
+ The bridge's STP identifier (the lower 48 bits of the bridge-id)
+ in the form
+ <var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>.
+ By default, the identifier is the MAC address of the bridge.
+ </column>
+
+ <column name="other_config" key="stp-priority"
+ type='{"type": "integer", "minInteger": 0, "maxInteger": 65535}'>
+ The bridge's relative priority value for determining the root
+ bridge (the upper 16 bits of the bridge-id). A bridge with the
+ lowest bridge-id is elected the root. By default, the priority
+ is 0x8000.
+ </column>
+
+ <column name="other_config" key="stp-hello-time"
+ type='{"type": "integer", "minInteger": 1, "maxInteger": 10}'>
+ The interval between transmissions of hello messages by
+ designated ports, in seconds. By default the hello interval is
+ 2 seconds.
+ </column>
+
+ <column name="other_config" key="stp-max-age"
+ type='{"type": "integer", "minInteger": 6, "maxInteger": 40}'>
+ The maximum age of the information transmitted by the bridge
+ when it is the root bridge, in seconds. By default, the maximum
+ age is 20 seconds.
+ </column>
+
+ <column name="other_config" key="stp-forward-delay"
+ type='{"type": "integer", "minInteger": 4, "maxInteger": 30}'>
+ The delay to wait between transitioning root and designated
+ ports to <code>forwarding</code>, in seconds. By default, the
+ forwarding delay is 15 seconds.
</column>
</group>
type <code>netdev</code>.
</column>
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate
- with Open vSwitch, rather than by Open vSwitch itself. System
- integrators should either use the Open vSwitch development
- mailing list to coordinate on common key-value definitions, or
- choose key names that are likely to be unique. The currently
- defined key-value pairs are:
- <dl>
- <dt><code>bridge-id</code></dt>
- <dd>A unique identifier of the bridge. On Citrix XenServer this
- will commonly be the same as <code>xs-network-uuids</code>.</dd>
- <dt><code>xs-network-uuids</code></dt>
- <dd>Semicolon-delimited set of universally unique identifier(s) for
- the network with which this bridge is associated on a Citrix
- XenServer host. The network identifiers are RFC 4122 UUIDs as
- displayed by, e.g., <code>xe network-list</code>.</dd>
- </dl>
+ <column name="external_ids" key="bridge-id">
+ A unique identifier of the bridge. On Citrix XenServer this will
+ commonly be the same as
+ <ref column="external_ids" key="xs-network-uuids"/>.
+ </column>
+
+ <column name="external_ids" key="xs-network-uuids">
+ Semicolon-delimited set of universally unique identifier(s) for the
+ network with which this bridge is associated on a Citrix XenServer
+ host. The network identifiers are RFC 4122 UUIDs as displayed by,
+ e.g., <code>xe network-list</code>.
+ </column>
+
+ <column name="other_config" key="hwaddr">
+ An Ethernet address in the form
+ <var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>
+ to set the hardware address of the local port and influence the
+ datapath ID.
+ </column>
+
+ <column name="other_config" key="flow-eviction-threshold"
+ type='{"type": "integer", "minInteger": 0}'>
+ <p>
+ A number of flows as a nonnegative integer. This sets number of
+ flows at which eviction from the kernel flow table will be triggered.
+ If there are a large number of flows then increasing this value to
+ around the number of flows present can result in reduced CPU usage
+ and packet loss.
+ </p>
+ <p>
+ The default is 1000. Values below 100 will be rounded up to 100.
+ </p>
</column>
- <column name="other_config">
- Key-value pairs for configuring rarely used bridge
- features. The currently defined key-value pairs are:
+ <column name="other_config" key="forward-bpdu"
+ type='{"type": "boolean"}'>
+ Option to allow forwarding of BPDU frames when NORMAL action is
+ invoked. Frames with reserved Ethernet addresses (e.g. STP
+ BPDU) will be forwarded when this option is enabled and the
+ switch is not providing that functionality. If STP is enabled
+ on the port, STP BPDUs will never be forwarded. If the Open
+ vSwitch bridge is used to connect different Ethernet networks,
+ and if Open vSwitch node does not run STP, then this option
+ should be enabled. Default is disabled, set to
+ <code>true</code> to enable.
+
+ The following destination MAC addresss will not be forwarded when this
+ option is enabled.
<dl>
- <dt><code>datapath-id</code></dt>
- <dd>Exactly 16 hex
- digits to set the OpenFlow datapath ID to a specific
- value. May not be all-zero.</dd>
- <dt><code>disable-in-band</code></dt>
- <dd>If set to <code>true</code>, disable in-band control on
- the bridge regardless of controller and manager settings.</dd>
- <dt><code>hwaddr</code></dt>
- <dd>An Ethernet address in the form
- <var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>
- to set the hardware address of the local port and influence the
- datapath ID.</dd>
- <dt><code>in-band-queue</code></dt>
+ <dt><code>01:80:c2:00:00:00</code></dt>
+ <dd>IEEE 802.1D Spanning Tree Protocol (STP).</dd>
+
+ <dt><code>01:80:c2:00:00:01</code></dt>
+ <dd>IEEE Pause frame.</dd>
+
+ <dt><code>01:80:c2:00:00:0<var>x</var></code></dt>
+ <dd>Other reserved protocols.</dd>
+
+ <dt><code>00:00:5e:00:01:<var>x</var><var>x</var></code></dt>
+ <dd> VRRP IPv4 virtual router MAC address. </dd>
+
+ <dt><code>00:00:5e:00:02:<var>x</var><var>x</var></code></dt>
+ <dd> VRRP IPv6 virtual router MAC address. </dd>
+
+ <dt><code>00:00:0c:07:ac:<var>x</var><var>x</var></code></dt>
+ <dd> HSRP Version 1. </dd>
+
+ <dt><code>00:00:0c:9f:f<var>x</var>:<var>x</var><var>x</var></code>
+ </dt>
+ <dd> HSRP Version 2. </dd>
+
+ <dt><code>00:07:b4:<var>x</var><var>x</var>:<var>x</var><var>x</var>:<var>x</var><var>x</var></code></dt>
+ <dd> GLBP. </dd>
+
+ <dt><code>01:00:0c:cc:cc:cc</code></dt>
<dd>
- A queue ID as a nonnegative integer. This sets the OpenFlow queue
- ID that will be used by flows set up by in-band control on this
- bridge. If unset, or if the port used by an in-band control flow
- does not have QoS configured, or if the port does not have a queue
- with the specified ID, the default queue is used instead.
+ Cisco Discovery Protocol (CDP), VLAN Trunking Protocol (VTP),
+ Dynamic Trunking Protocol (DTP), Port Aggregation Protocol (PAgP),
+ and others.
</dd>
+
+ <dt><code>01:00:0c:cc:cc:cd</code></dt>
+ <dd>Cisco Shared Spanning Tree Protocol PVSTP+.</dd>
+
+ <dt><code>01:00:0c:cd:cd:cd</code></dt>
+ <dd>Cisco STP Uplink Fast.</dd>
+
+ <dt><code>01:00:0c:00:00:00</code></dt>
+ <dd>Cisco Inter Switch Link.</dd>
</dl>
</column>
+
+ <column name="other_config" key="mac-aging-time"
+ type='{"type": "integer", "minInteger": 1}'>
+ <p>
+ The maximum number of seconds to retain a MAC learning entry for
+ which no packets have been seen. The default is currently 300
+ seconds (5 minutes). The value, if specified, is forced into a
+ reasonable range, currently 15 to 3600 seconds.
+ </p>
+
+ <p>
+ A short MAC aging time allows a network to more quickly detect that a
+ host is no longer connected to a switch port. However, it also makes
+ it more likely that packets will be flooded unnecessarily, when they
+ are addressed to a connected host that rarely transmits packets. To
+ reduce the incidence of unnecessary flooding, use a MAC aging time
+ longer than the maximum interval at which a host will ordinarily
+ transmit packets.
+ </p>
+ </column>
+ </group>
+
+ <group title="Bridge Status">
+ <p>
+ Status information about bridges.
+ </p>
+ <column name="status">
+ Key-value pairs that report bridge status.
+ </column>
+ <column name="status" key="stp_bridge_id">
+ <p>
+ The bridge-id (in hex) used in spanning tree advertisements.
+ Configuring the bridge-id is described in the
+ <code>stp-system-id</code> and <code>stp-priority</code> keys
+ of the <code>other_config</code> section earlier.
+ </p>
+ </column>
+ <column name="status" key="stp_designated_root">
+ <p>
+ The designated root (in hex) for this spanning tree.
+ </p>
+ </column>
+ <column name="status" key="stp_root_path_cost">
+ <p>
+ The path cost of reaching the designated bridge. A lower
+ number is better.
+ </p>
+ </column>
+ </group>
+
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="other_config"/>
+ <column name="external_ids"/>
</group>
</table>
<table name="Port" table="Port or bond configuration.">
<p>A port within a <ref table="Bridge"/>.</p>
<p>Most commonly, a port has exactly one ``interface,'' pointed to by its
- <ref column="interfaces"/> column. Such a port logically
- corresponds to a port on a physical Ethernet switch. A port
- with more than one interface is a ``bonded port'' (see
- <ref group="Bonding Configuration"/>).</p>
+ <ref column="interfaces"/> column. Such a port logically
+ corresponds to a port on a physical Ethernet switch. A port
+ with more than one interface is a ``bonded port'' (see
+ <ref group="Bonding Configuration"/>).</p>
<p>Some properties that one might think as belonging to a port are actually
- part of the port's <ref table="Interface"/> members.</p>
+ part of the port's <ref table="Interface"/> members.</p>
<column name="name">
Port name. Should be alphanumeric and no more than about 8
</column>
<group title="VLAN Configuration">
- <p>A bridge port must be configured for VLANs in one of two
- mutually exclusive ways:
+ <p>Bridge ports support the following types of VLAN configuration:</p>
+ <dl>
+ <dt>trunk</dt>
+ <dd>
+ <p>
+ A trunk port carries packets on one or more specified VLANs
+ specified in the <ref column="trunks"/> column (often, on every
+ VLAN). A packet that ingresses on a trunk port is in the VLAN
+ specified in its 802.1Q header, or VLAN 0 if the packet has no
+ 802.1Q header. A packet that egresses through a trunk port will
+ have an 802.1Q header if it has a nonzero VLAN ID.
+ </p>
+
+ <p>
+ Any packet that ingresses on a trunk port tagged with a VLAN that
+ the port does not trunk is dropped.
+ </p>
+ </dd>
+
+ <dt>access</dt>
+ <dd>
+ <p>
+ An access port carries packets on exactly one VLAN specified in the
+ <ref column="tag"/> column. Packets egressing on an access port
+ have no 802.1Q header.
+ </p>
+
+ <p>
+ Any packet with an 802.1Q header with a nonzero VLAN ID that
+ ingresses on an access port is dropped, regardless of whether the
+ VLAN ID in the header is the access port's VLAN ID.
+ </p>
+ </dd>
+
+ <dt>native-tagged</dt>
+ <dd>
+ A native-tagged port resembles a trunk port, with the exception that
+ a packet without an 802.1Q header that ingresses on a native-tagged
+ port is in the ``native VLAN'' (specified in the <ref column="tag"/>
+ column).
+ </dd>
+
+ <dt>native-untagged</dt>
+ <dd>
+ A native-untagged port resembles a native-tagged port, with the
+ exception that a packet that egresses on a native-untagged port in
+ the native VLAN will not have an 802.1Q header.
+ </dd>
+ </dl>
+ <p>
+ A packet will only egress through bridge ports that carry the VLAN of
+ the packet, as described by the rules above.
+ </p>
+
+ <column name="vlan_mode">
+ <p>
+ The VLAN mode of the port, as described above. When this column is
+ empty, a default mode is selected as follows:
+ </p>
<ul>
- <li>A ``trunk port'' has an empty value for <ref
- column="tag"/>. Its <ref column="trunks"/> value may be
- empty or non-empty.</li>
- <li>An ``implicitly tagged VLAN port'' or ``access port''
- has an nonempty value for <ref column="tag"/>. Its
- <ref column="trunks"/> value must be empty.</li>
+ <li>
+ If <ref column="tag"/> contains a value, the port is an access
+ port. The <ref column="trunks"/> column should be empty.
+ </li>
+ <li>
+ Otherwise, the port is a trunk port. The <ref column="trunks"/>
+ column value is honored if it is present.
+ </li>
</ul>
- If <ref column="trunks"/> and <ref column="tag"/> are both
- nonempty, the configuration is ill-formed.
- </p>
+ </column>
<column name="tag">
<p>
- If this is an access port (see above), the port's implicitly
- tagged VLAN. Must be empty if this is a trunk port.
+ For an access port, the port's implicitly tagged VLAN. For a
+ native-tagged or native-untagged port, the port's native VLAN. Must
+ be empty if this is a trunk port.
</p>
+ </column>
+
+ <column name="trunks">
<p>
- Frames arriving on trunk ports will be forwarded to this
- port only if they are tagged with the given VLAN (or, if
- <ref column="tag"/> is 0, then if they lack a VLAN header).
- Frames arriving on other access ports will be forwarded to
- this port only if they have the same <ref column="tag"/>
- value. Frames forwarded to this port will not have an
- 802.1Q header.
+ For a trunk, native-tagged, or native-untagged port, the 802.1Q VLAN
+ or VLANs that this port trunks; if it is empty, then the port trunks
+ all VLANs. Must be empty if this is an access port.
</p>
<p>
- When a frame with a 802.1Q header that indicates a nonzero
- VLAN is received on an access port, it is discarded.
+ A native-tagged or native-untagged port always trunks its native
+ VLAN, regardless of whether <ref column="trunks"/> includes that
+ VLAN.
</p>
</column>
- <column name="trunks">
+ <column name="other_config" key="priority-tags"
+ type='{"type": "boolean"}'>
+ <p>
+ An 802.1Q header contains two important pieces of information: a VLAN
+ ID and a priority. A frame with a zero VLAN ID, called a
+ ``priority-tagged'' frame, is supposed to be treated the same way as
+ a frame without an 802.1Q header at all (except for the priority).
+ </p>
+
<p>
- If this is a trunk port (see above), the 802.1Q VLAN(s) that
- this port trunks; if it is empty, then the port trunks all
- VLANs. Must be empty if this is an access port.
+ However, some network elements ignore any frame that has 802.1Q
+ header at all, even when the VLAN ID is zero. Therefore, by default
+ Open vSwitch does not output priority-tagged frames, instead omitting
+ the 802.1Q header entirely if the VLAN ID is zero. Set this key to
+ <code>true</code> to enable priority-tagged frames on a port.
</p>
+
+ <p>
+ Regardless of this setting, Open vSwitch omits the 802.1Q header on
+ output if both the VLAN ID and priority would be zero.
+ </p>
+
<p>
- Frames arriving on trunk ports are dropped if they are not
- in one of the specified VLANs. For this purpose, packets
- that have no VLAN header are treated as part of VLAN 0.
+ All frames output to native-tagged ports have a nonzero VLAN ID, so
+ this setting is not meaningful on native-tagged ports.
</p>
</column>
</group>
<group title="Bonding Configuration">
- <p>A port that has more than one interface is a ``bonded port.''
- Bonding allows for load balancing and fail-over. Open vSwitch
- supports ``source load balancing'' (SLB) bonding, which
- assigns flows to slaves based on source MAC address, with
- periodic rebalancing as traffic patterns change. This form of
- bonding does not require 802.3ad or other special support from
- the upstream switch to which the slave devices are
- connected.</p>
+ <p>A port that has more than one interface is a ``bonded port.'' Bonding
+ allows for load balancing and fail-over. Some kinds of bonding will
+ work with any kind of upstream switch:</p>
+
+ <dl>
+ <dt><code>balance-slb</code></dt>
+ <dd>
+ Balances flows among slaves based on source MAC address and output
+ VLAN, with periodic rebalancing as traffic patterns change.
+ </dd>
+
+ <dt><code>active-backup</code></dt>
+ <dd>
+ Assigns all flows to one slave, failing over to a backup slave when
+ the active slave is disabled.
+ </dd>
+ </dl>
+
+ <p>
+ The following modes require the upstream switch to support 802.3ad with
+ successful LACP negotiation:
+ </p>
+
+ <dl>
+ <dt><code>balance-tcp</code></dt>
+ <dd>
+ Balances flows among slaves based on L2, L3, and L4 protocol
+ information such as destination MAC address, IP address, and TCP
+ port.
+ </dd>
+
+ <dt><code>stable</code></dt>
+ <dd>
+ <p>Attempts to always assign a given flow to the same slave
+ consistently. In an effort to maintain stability, no load
+ balancing is done. Uses a similar hashing strategy to
+ <code>balance-tcp</code>, always taking into account L3 and L4
+ fields even if LACP negotiations are unsuccessful. </p>
+ <p>Slave selection decisions are made based on <ref table="Interface"
+ column="other_config" key="bond-stable-id"/> if set. Otherwise,
+ OpenFlow port number is used. Decisions are consistent across all
+ <code>ovs-vswitchd</code> instances with equivalent
+ <ref table="Interface" column="other_config" key="bond-stable-id"/>
+ values.</p>
+ </dd>
+ </dl>
<p>These columns apply only to bonded ports. Their values are
- otherwise ignored.</p>
+ otherwise ignored.</p>
- <column name="bond_updelay">
- <p>For a bonded port, the number of milliseconds for which carrier must
- stay up on an interface before the interface is considered to be up.
- Specify <code>0</code> to enable the interface immediately.</p>
- <p>This setting is honored only when at least one bonded interface is
- already enabled. When no interfaces are enabled, then the first bond
- interface to come up is enabled immediately.</p>
+ <column name="bond_mode">
+ <p>The type of bonding used for a bonded port. Defaults to
+ <code>active-backup</code> if unset.
+ </p>
</column>
- <column name="bond_downdelay">
- For a bonded port, the number of milliseconds for which carrier must
- stay down on an interface before the interface is considered to be
- down. Specify <code>0</code> to disable the interface immediately.
+ <column name="other_config" key="bond-hash-basis"
+ type='{"type": "integer"}'>
+ An integer hashed along with flows when choosing output slaves in load
+ balanced bonds. When changed, all flows will be assigned different
+ hash values possibly causing slave selection decisions to change. Does
+ not affect bonding modes which do not employ load balancing such as
+ <code>active-backup</code>.
</column>
+ <group title="Link Failure Detection">
+ <p>
+ An important part of link bonding is detecting that links are down so
+ that they may be disabled. These settings determine how Open vSwitch
+ detects link failure.
+ </p>
+
+ <column name="other_config" key="bond-detect-mode"
+ type='{"type": "string", "enum": ["set", ["carrier", "miimon"]]}'>
+ The means used to detect link failures. Defaults to
+ <code>carrier</code> which uses each interface's carrier to detect
+ failures. When set to <code>miimon</code>, will check for failures
+ by polling each interface's MII.
+ </column>
+
+ <column name="other_config" key="bond-miimon-interval"
+ type='{"type": "integer"}'>
+ The interval, in milliseconds, between successive attempts to poll
+ each interface's MII. Relevant only when <ref column="other_config"
+ key="bond-detect-mode"/> is <code>miimon</code>.
+ </column>
+
+ <column name="bond_updelay">
+ <p>
+ The number of milliseconds for which carrier must stay up on an
+ interface before the interface is considered to be up. Specify
+ <code>0</code> to enable the interface immediately.
+ </p>
+
+ <p>
+ This setting is honored only when at least one bonded interface is
+ already enabled. When no interfaces are enabled, then the first
+ bond interface to come up is enabled immediately.
+ </p>
+ </column>
+
+ <column name="bond_downdelay">
+ The number of milliseconds for which carrier must stay down on an
+ interface before the interface is considered to be down. Specify
+ <code>0</code> to disable the interface immediately.
+ </column>
+ </group>
+
+ <group title="LACP Configuration">
+ <p>
+ LACP, the Link Aggregation Control Protocol, is an IEEE standard that
+ allows switches to automatically detect that they are connected by
+ multiple links and aggregate across those links. These settings
+ control LACP behavior.
+ </p>
+
+ <column name="lacp">
+ Configures LACP on this port. LACP allows directly connected
+ switches to negotiate which links may be bonded. LACP may be enabled
+ on non-bonded ports for the benefit of any switches they may be
+ connected to. <code>active</code> ports are allowed to initiate LACP
+ negotiations. <code>passive</code> ports are allowed to participate
+ in LACP negotiations initiated by a remote switch, but not allowed to
+ initiate such negotiations themselves. If LACP is enabled on a port
+ whose partner switch does not support LACP, the bond will be
+ disabled. Defaults to <code>off</code> if unset.
+ </column>
+
+ <column name="other_config" key="lacp-system-id">
+ The LACP system ID of this <ref table="Port"/>. The system ID of a
+ LACP bond is used to identify itself to its partners. Must be a
+ nonzero MAC address. Defaults to the bridge Ethernet address if
+ unset.
+ </column>
+
+ <column name="other_config" key="lacp-system-priority"
+ type='{"type": "integer", "minInteger": 1, "maxInteger": 65535}'>
+ The LACP system priority of this <ref table="Port"/>. In LACP
+ negotiations, link status decisions are made by the system with the
+ numerically lower priority.
+ </column>
+
+ <column name="other_config" key="lacp-time"
+ type='{"type": "string", "enum": ["set", ["fast", "slow"]]}'>
+ <p>
+ The LACP timing which should be used on this <ref table="Port"/>.
+ By default <code>slow</code> is used. When configured to be
+ <code>fast</code> LACP heartbeats are requested at a rate of once
+ per second causing connectivity problems to be detected more
+ quickly. In <code>slow</code> mode, heartbeats are requested at a
+ rate of once every 30 seconds.
+ </p>
+ </column>
+ </group>
+
+ <group title="SLB Configuration">
+ <p>
+ These settings control behavior when a bond is in
+ <code>balance-slb</code> mode, regardless of whether the bond was
+ intentionally configured in SLB mode or it fell back to SLB mode
+ because LACP negotiation failed.
+ </p>
+
+ <column name="other_config" key="bond-rebalance-interval"
+ type='{"type": "integer", "minInteger": 0, "maxInteger": 10000}'>
+ For a load balanced bonded port, the number of milliseconds between
+ successive attempts to rebalance the bond, that is, to move flows
+ from one interface on the bond to another in an attempt to keep usage
+ of each interface roughly equal. If zero, load balancing is disabled
+ on the bond (carrier status changes still cause flows to move). If
+ less than 1000ms, the rebalance interval will be 1000ms.
+ </column>
+ </group>
+
<column name="bond_fake_iface">
For a bonded port, whether to create a fake internal interface with the
name of the port. Use only for compatibility with legacy software that
</column>
</group>
- <group title="Other Features">
- <column name="qos">
- Quality of Service configuration for this port.
+ <group title="Spanning Tree Configuration">
+ <column name="other_config" key="stp-enable"
+ type='{"type": "boolean"}'>
+ If spanning tree is enabled on the bridge, member ports are
+ enabled by default (with the exception of bond, internal, and
+ mirror ports which do not work with STP). If this column's
+ value is <code>false</code> spanning tree is disabled on the
+ port.
</column>
-
- <column name="mac">
- The MAC address to use for this port for the purpose of choosing the
+
+ <column name="other_config" key="stp-port-num"
+ type='{"type": "integer", "minInteger": 1, "maxInteger": 255}'>
+ The port number used for the lower 8 bits of the port-id. By
+ default, the numbers will be assigned automatically. If any
+ port's number is manually configured on a bridge, then they
+ must all be.
+ </column>
+
+ <column name="other_config" key="stp-port-priority"
+ type='{"type": "integer", "minInteger": 0, "maxInteger": 255}'>
+ The port's relative priority value for determining the root
+ port (the upper 8 bits of the port-id). A port with a lower
+ port-id will be chosen as the root port. By default, the
+ priority is 0x80.
+ </column>
+
+ <column name="other_config" key="stp-path-cost"
+ type='{"type": "integer", "minInteger": 0, "maxInteger": 65535}'>
+ Spanning tree path cost for the port. A lower number indicates
+ a faster link. By default, the cost is based on the maximum
+ speed of the link.
+ </column>
+ </group>
+
+ <group title="Other Features">
+ <column name="qos">
+ Quality of Service configuration for this port.
+ </column>
+
+ <column name="mac">
+ The MAC address to use for this port for the purpose of choosing the
bridge's MAC address. This column does not necessarily reflect the
port's actual MAC address, nor will setting it change the port's actual
MAC address.
Bridge? See ovs-vsctl(8) for more information.
</column>
- <column name="external_ids">
+ <column name="external_ids" key="fake-bridge-id-*">
+ External IDs for a fake bridge (see the <ref column="fake_bridge"/>
+ column) are defined by prefixing a <ref table="Bridge"/> <ref
+ table="Bridge" column="external_ids"/> key with
+ <code>fake-bridge-</code>,
+ e.g. <code>fake-bridge-xs-network-uuids</code>.
+ </column>
+ </group>
+
+ <group title="Port Status">
+ <p>
+ Status information about ports attached to bridges.
+ </p>
+ <column name="status">
+ Key-value pairs that report port status.
+ </column>
+ <column name="status" key="stp_port_id">
+ <p>
+ The port-id (in hex) used in spanning tree advertisements for
+ this port. Configuring the port-id is described in the
+ <code>stp-port-num</code> and <code>stp-port-priority</code>
+ keys of the <code>other_config</code> section earlier.
+ </p>
+ </column>
+ <column name="status" key="stp_state"
+ type='{"type": "string", "enum": ["set",
+ ["disabled", "listening", "learning",
+ "forwarding", "blocking"]]}'>
<p>
- Key-value pairs for use by external frameworks that integrate with
- Open vSwitch, rather than by Open vSwitch itself. System integrators
- should either use the Open vSwitch development mailing list to
- coordinate on common key-value definitions, or choose key names that
- are likely to be unique.
+ STP state of the port.
</p>
+ </column>
+ <column name="status" key="stp_sec_in_state"
+ type='{"type": "integer", "minInteger": 0}'>
<p>
- No key-value pairs native to <ref table="Port"/> are currently
- defined. For fake bridges (see the <ref column="fake_bridge"/>
- column), external IDs for the fake bridge are defined here by
- prefixing a <ref table="Bridge"/> <ref table="Bridge"
- column="external_ids"/> key with <code>fake-bridge-</code>,
- e.g. <code>fake-bridge-xs-network-uuids</code>.
+ The amount of time (in seconds) port has been in the current
+ STP state.
</p>
</column>
-
- <column name="other_config">
- Key-value pairs for configuring rarely used port features. The
- currently defined key-value pairs are:
- <dl>
- <dt><code>hwaddr</code></dt>
- <dd>An Ethernet address in the form
- <code><var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var></code>.</dd>
- <dt><code>bond-rebalance-interval</code></dt>
- <dd>For a bonded port, the number of milliseconds between
- successive attempts to rebalance the bond, that is, to
- move source MACs and their flows from one interface on
- the bond to another in an attempt to keep usage of each
- interface roughly equal. The default is 10000 (10
- seconds), and the minimum is 1000 (1 second).</dd>
- </dl>
+ <column name="status" key="stp_role"
+ type='{"type": "string", "enum": ["set",
+ ["root", "designated", "alternate"]]}'>
+ <p>
+ STP role of the port.
+ </p>
</column>
</group>
+
+ <group title="Port Statistics">
+ <p>
+ Key-value pairs that report port statistics.
+ </p>
+ <group title="Statistics: STP transmit and receive counters">
+ <column name="statistics" key="stp_tx_count">
+ Number of STP BPDUs sent on this port by the spanning
+ tree library.
+ </column>
+ <column name="statistics" key="stp_rx_count">
+ Number of STP BPDUs received on this port and accepted by the
+ spanning tree library.
+ </column>
+ <column name="statistics" key="stp_error_count">
+ Number of bad STP BPDUs received on this port. Bad BPDUs
+ include runt packets and those with an unexpected protocol ID.
+ </column>
+ </group>
+ </group>
+
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="other_config"/>
+ <column name="external_ids"/>
+ </group>
</table>
<table name="Interface" title="One physical network device in a Port.">
<column name="mac">
<p>Ethernet address to set for this interface. If unset then the
- default MAC address is used:</p>
+ default MAC address is used:</p>
<ul>
<li>For the local interface, the default is the lowest-numbered MAC
- address among the other bridge ports, either the value of the
- <ref table="Port" column="mac"/> in its <ref table="Port"/> record,
- if set, or its actual MAC (for bonded ports, the MAC of its slave
- whose name is first in alphabetical order). Internal ports and
- bridge ports that are used as port mirroring destinations (see the
- <ref table="Mirror"/> table) are ignored.</li>
+ address among the other bridge ports, either the value of the
+ <ref table="Port" column="mac"/> in its <ref table="Port"/> record,
+ if set, or its actual MAC (for bonded ports, the MAC of its slave
+ whose name is first in alphabetical order). Internal ports and
+ bridge ports that are used as port mirroring destinations (see the
+ <ref table="Mirror"/> table) are ignored.</li>
<li>For other internal interfaces, the default MAC is randomly
- generated.</li>
+ generated.</li>
<li>External interfaces typically have a MAC address associated with
- their hardware.</li>
+ their hardware.</li>
</ul>
<p>Some interfaces may not have a software-controllable MAC
address.</p>
<column name="ofport">
<p>OpenFlow port number for this interface. Unlike most columns, this
- column's value should be set only by Open vSwitch itself. Other
- clients should set this column to an empty set (the default) when
- creating an <ref table="Interface"/>.</p>
+ column's value should be set only by Open vSwitch itself. Other
+ clients should set this column to an empty set (the default) when
+ creating an <ref table="Interface"/>.</p>
<p>Open vSwitch populates this column when the port number becomes
- known. If the interface is successfully added,
- <ref column="ofport"/> will be set to a number between 1 and 65535
- (generally either in the range 1 to 65279, inclusive, or 65534, the
- port number for the OpenFlow ``local port''). If the interface
- cannot be added then Open vSwitch sets this column
- to -1.</p>
+ known. If the interface is successfully added,
+ <ref column="ofport"/> will be set to a number between 1 and 65535
+ (generally either in the range 1 to 65279, inclusive, or 65534, the
+ port number for the OpenFlow ``local port''). If the interface
+ cannot be added then Open vSwitch sets this column
+ to -1.</p>
</column>
</group>
<group title="System-Specific Details">
<column name="type">
- The interface type, one of:
+ <p>
+ The interface type, one of:
+ </p>
+
<dl>
<dt><code>system</code></dt>
<dd>An ordinary network device, e.g. <code>eth0</code> on Linux.
- Sometimes referred to as ``external interfaces'' since they are
- generally connected to hardware external to that on which the Open
- vSwitch is running. The empty string is a synonym for
- <code>system</code>.</dd>
+ Sometimes referred to as ``external interfaces'' since they are
+ generally connected to hardware external to that on which the Open
+ vSwitch is running. The empty string is a synonym for
+ <code>system</code>.</dd>
+
<dt><code>internal</code></dt>
<dd>A simulated network device that sends and receives traffic. An
- internal interface whose <ref column="name"/> is the same as its
- bridge's <ref table="Open_vSwitch" column="name"/> is called the
- ``local interface.'' It does not make sense to bond an internal
- interface, so the terms ``port'' and ``interface'' are often used
- imprecisely for internal interfaces.</dd>
+ internal interface whose <ref column="name"/> is the same as its
+ bridge's <ref table="Open_vSwitch" column="name"/> is called the
+ ``local interface.'' It does not make sense to bond an internal
+ interface, so the terms ``port'' and ``interface'' are often used
+ imprecisely for internal interfaces.</dd>
+
<dt><code>tap</code></dt>
<dd>A TUN/TAP device managed by Open vSwitch.</dd>
+
<dt><code>gre</code></dt>
- <dd>An Ethernet over RFC 2890 Generic Routing Encapsulation over IPv4
- tunnel. Each tunnel must be uniquely identified by the
- combination of <code>remote_ip</code>, <code>local_ip</code>, and
- <code>in_key</code>. Note that if two ports are defined that are
- the same except one has an optional identifier and the other does
- not, the more specific one is matched first. <code>in_key</code>
- is considered more specific than <code>local_ip</code> if a port
- defines one and another port defines the other. The following
- options may be specified in the <ref column="options"/> column:
- <dl>
- <dt><code>remote_ip</code></dt>
- <dd>Required. The tunnel endpoint.</dd>
- </dl>
- <dl>
- <dt><code>local_ip</code></dt>
- <dd>Optional. The destination IP that received packets must
- match. Default is to match all addresses.</dd>
- </dl>
- <dl>
- <dt><code>in_key</code></dt>
- <dd>Optional. The GRE key that received packets must contain.
- It may either be a 32-bit number (no key and a key of 0 are
- treated as equivalent) or the word <code>flow</code>. If
- <code>flow</code> is specified then any key will be accepted
- and the key will be placed in the <code>tun_id</code> field
- for matching in the flow table. The ovs-ofctl manual page
- contains additional information about matching fields in
- OpenFlow flows. Default is no key.</dd>
- </dl>
- <dl>
- <dt><code>out_key</code></dt>
- <dd>Optional. The GRE key to be set on outgoing packets. It may
- either be a 32-bit number or the word <code>flow</code>. If
- <code>flow</code> is specified then the key may be set using
- the <code>set_tunnel</code> Nicira OpenFlow vendor extension (0
- is used in the absence of an action). The ovs-ofctl manual
- page contains additional information about the Nicira OpenFlow
- vendor extensions. Default is no key.</dd>
- </dl>
- <dl>
- <dt><code>key</code></dt>
- <dd>Optional. Shorthand to set <code>in_key</code> and
- <code>out_key</code> at the same time.</dd>
- </dl>
- <dl>
- <dt><code>tos</code></dt>
- <dd>Optional. The value of the ToS bits to be set on the
- encapsulating packet. It may also be the word
- <code>inherit</code>, in which case the ToS will be copied from
- the inner packet if it is IPv4 or IPv6 (otherwise it will be
- 0). Note that the ECN fields are always inherited. Default is
- 0.</dd>
- </dl>
- <dl>
- <dt><code>ttl</code></dt>
- <dd>Optional. The TTL to be set on the encapsulating packet.
- It may also be the word <code>inherit</code>, in which case the
- TTL will be copied from the inner packet if it is IPv4 or IPv6
- (otherwise it will be the system default, typically 64).
- Default is the system default TTL.</dd>
- </dl>
- <dl>
- <dt><code>csum</code></dt>
- <dd>Optional. Compute GRE checksums on outgoing packets.
- Checksums present on incoming packets will be validated
- regardless of this setting. Note that GRE checksums
- impose a significant performance penalty as they cover the
- entire packet. As the contents of the packet is typically
- covered by L3 and L4 checksums, this additional checksum only
- adds value for the GRE and encapsulated Ethernet headers.
- Default is disabled, set to <code>true</code> to enable.</dd>
- </dl>
- <dl>
- <dt><code>pmtud</code></dt>
- <dd>Optional. Enable tunnel path MTU discovery. If enabled
- ``ICMP destination unreachable - fragmentation'' needed
- messages will be generated for IPv4 packets with the DF bit set
- and IPv6 packets above the minimum MTU if the packet size
- exceeds the path MTU minus the size of the tunnel headers. It
- also forces the encapsulating packet DF bit to be set (it is
- always set if the inner packet implies path MTU discovery).
- Note that this option causes behavior that is typically
- reserved for routers and therefore is not entirely in
- compliance with the IEEE 802.1D specification for bridges.
- Default is enabled, set to <code>false</code> to disable.</dd>
- </dl>
- <dl>
- <dt><code>header_cache</code></dt>
- <dd>Optional. Enable caching of tunnel headers and the output
- path. This can lead to a significant performance increase
- without changing behavior. In general it should not be
- necessary to adjust this setting. However, the caching can
- bypass certain components of the IP stack (such as IP tables)
- and it may be useful to disable it if these features are
- required or as a debugging measure. Default is enabled, set to
- <code>false</code> to disable. If IPsec is enabled through the
- <ref column="other_config"/> parameters, header caching will be
- automatically disabled.</dd>
- </dl>
+ <dd>
+ An Ethernet over RFC 2890 Generic Routing Encapsulation over IPv4
+ tunnel. See <ref group="Tunnel Options"/> for information on
+ configuring GRE tunnels.
+ </dd>
+
+ <dt><code>ipsec_gre</code></dt>
+ <dd>
+ An Ethernet over RFC 2890 Generic Routing Encapsulation over IPv4
+ IPsec tunnel.
</dd>
+
<dt><code>capwap</code></dt>
- <dd>Ethernet tunneling over the UDP transport portion of CAPWAP
- (RFC 5415). This allows interoperability with certain switches
- where GRE is not available. Note that only the tunneling component
- of the protocol is implemented. Due to the non-standard use of
- CAPWAP, UDP ports 58881 and 58882 are used as the source and
- destinations ports respectivedly. Each tunnel must be uniquely
- identified by the combination of <code>remote_ip</code> and
- <code>local_ip</code>. If two ports are defined that are the same
- except one includes <code>local_ip</code> and the other does not,
- the more specific one is matched first. CAPWAP support is not
- available on all platforms. Currently it is only supported in the
- Linux kernel module with kernel versions >= 2.6.25. The following
- options may be specified in the <ref column="options"/> column:
- <dl>
- <dt><code>remote_ip</code></dt>
- <dd>Required. The tunnel endpoint.</dd>
- </dl>
- <dl>
- <dt><code>local_ip</code></dt>
- <dd>Optional. The destination IP that received packets must
- match. Default is to match all addresses.</dd>
- </dl>
- <dl>
- <dt><code>tos</code></dt>
- <dd>Optional. The value of the ToS bits to be set on the
- encapsulating packet. It may also be the word
- <code>inherit</code>, in which case the ToS will be copied from
- the inner packet if it is IPv4 or IPv6 (otherwise it will be
- 0). Note that the ECN fields are always inherited. Default is
- 0.</dd>
- </dl>
- <dl>
- <dt><code>ttl</code></dt>
- <dd>Optional. The TTL to be set on the encapsulating packet.
- It may also be the word <code>inherit</code>, in which case the
- TTL will be copied from the inner packet if it is IPv4 or IPv6
- (otherwise it will be the system default, typically 64).
- Default is the system default TTL.</dd>
- </dl>
- <dl>
- <dt><code>pmtud</code></dt>
- <dd>Optional. Enable tunnel path MTU discovery. If enabled
- ``ICMP destination unreachable - fragmentation'' needed
- messages will be generated for IPv4 packets with the DF bit set
- and IPv6 packets above the minimum MTU if the packet size
- exceeds the path MTU minus the size of the tunnel headers. It
- also forces the encapsulating packet DF bit to be set (it is
- always set if the inner packet implies path MTU discovery).
- Note that this option causes behavior that is typically
- reserved for routers and therefore is not entirely in
- compliance with the IEEE 802.1D specification for bridges.
- Default is enabled, set to <code>false</code> to disable.</dd>
- </dl>
- <dl>
- <dt><code>header_cache</code></dt>
- <dd>Optional. Enable caching of tunnel headers and the output
- path. This can lead to a significant performance increase
- without changing behavior. In general it should not be
- necessary to adjust this setting. However, the caching can
- bypass certain components of the IP stack (such as IP tables)
- and it may be useful to disable it if these features are
- required or as a debugging measure. Default is enabled, set to
- <code>false</code> to disable.</dd>
- </dl>
+ <dd>
+ An Ethernet tunnel over the UDP transport portion of CAPWAP (RFC
+ 5415). This allows interoperability with certain switches that do
+ not support GRE. Only the tunneling component of the protocol is
+ implemented. UDP ports 58881 and 58882 are used as the source and
+ destination ports respectively. CAPWAP is currently supported only
+ with the Linux kernel datapath with kernel version 2.6.26 or later.
</dd>
+
<dt><code>patch</code></dt>
<dd>
- <p>
- A pair of virtual devices that act as a patch cable. The <ref
- column="options"/> column must have the following key-value pair:
- </p>
- <dl>
- <dt><code>peer</code></dt>
- <dd>
- The <ref column="name"/> of the <ref table="Interface"/> for
- the other side of the patch. The named <ref
- table="Interface"/>'s own <code>peer</code> option must specify
- this <ref table="Interface"/>'s name. That is, the two patch
- interfaces must have reversed <ref column="name"/> and
- <code>peer</code> values.
- </dd>
- </dl>
+ A pair of virtual devices that act as a patch cable.
</dd>
+
+ <dt><code>null</code></dt>
+ <dd>An ignored interface.</dd>
</dl>
</column>
+ </group>
- <column name="options">
- Configuration options whose interpretation varies based on
- <ref column="type"/>.
+ <group title="Tunnel Options">
+ <p>
+ These options apply to interfaces with <ref column="type"/> of
+ <code>gre</code>, <code>ipsec_gre</code>, and <code>capwap</code>.
+ </p>
+
+ <p>
+ Each tunnel must be uniquely identified by the combination of <ref
+ column="type"/>, <ref column="options" key="remote_ip"/>, <ref
+ column="options" key="local_ip"/>, and <ref column="options"
+ key="in_key"/>. If two ports are defined that are the same except one
+ has an optional identifier and the other does not, the more specific
+ one is matched first. <ref column="options" key="in_key"/> is
+ considered more specific than <ref column="options" key="local_ip"/> if
+ a port defines one and another port defines the other.
+ </p>
+
+ <column name="options" key="remote_ip">
+ <p>
+ Required. The tunnel endpoint. Unicast and multicast endpoints are
+ both supported.
+ </p>
+
+ <p>
+ When a multicast endpoint is specified, a routing table lookup occurs
+ only when the tunnel is created. Following a routing change, delete
+ and then re-create the tunnel to force a new routing table lookup.
+ </p>
</column>
- <column name="status">
+ <column name="options" key="local_ip">
+ Optional. The destination IP that received packets must match.
+ Default is to match all addresses. Must be omitted when <ref
+ column="options" key="remote_ip"/> is a multicast address.
+ </column>
+
+ <column name="options" key="in_key">
+ <p>Optional. The key that received packets must contain, one of:</p>
+
+ <ul>
+ <li>
+ <code>0</code>. The tunnel receives packets with no key or with a
+ key of 0. This is equivalent to specifying no <ref column="options"
+ key="in_key"/> at all.
+ </li>
+ <li>
+ A positive 32-bit (for GRE) or 64-bit (for CAPWAP) number. The
+ tunnel receives only packets with the specified key.
+ </li>
+ <li>
+ The word <code>flow</code>. The tunnel accepts packets with any
+ key. The key will be placed in the <code>tun_id</code> field for
+ matching in the flow table. The <code>ovs-ofctl</code> manual page
+ contains additional information about matching fields in OpenFlow
+ flows.
+ </li>
+ </ul>
+
<p>
- Key-value pairs that report port status. Supported status
- values are <code>type</code>-dependent.
</p>
- <p>The only currently defined key-value pair is:</p>
- <dl>
- <dt><code>source_ip</code></dt>
- <dd>The source IP address used for an IPv4 tunnel end-point,
- such as <code>gre</code> or <code>capwap</code>. Not
- supported by all implementations.</dd>
- </dl>
+ </column>
+
+ <column name="options" key="out_key">
+ <p>Optional. The key to be set on outgoing packets, one of:</p>
+
+ <ul>
+ <li>
+ <code>0</code>. Packets sent through the tunnel will have no key.
+ This is equivalent to specifying no <ref column="options"
+ key="out_key"/> at all.
+ </li>
+ <li>
+ A positive 32-bit (for GRE) or 64-bit (for CAPWAP) number. Packets
+ sent through the tunnel will have the specified key.
+ </li>
+ <li>
+ The word <code>flow</code>. Packets sent through the tunnel will
+ have the key set using the <code>set_tunnel</code> Nicira OpenFlow
+ vendor extension (0 is used in the absence of an action). The
+ <code>ovs-ofctl</code> manual page contains additional information
+ about the Nicira OpenFlow vendor extensions.
+ </li>
+ </ul>
+ </column>
+
+ <column name="options" key="key">
+ Optional. Shorthand to set <code>in_key</code> and
+ <code>out_key</code> at the same time.
+ </column>
+
+ <column name="options" key="tos">
+ Optional. The value of the ToS bits to be set on the encapsulating
+ packet. ToS is interpreted as DSCP and ECN bits, ECN part must be
+ zero. It may also be the word <code>inherit</code>, in which case
+ the ToS will be copied from the inner packet if it is IPv4 or IPv6
+ (otherwise it will be 0). The ECN fields are always inherited.
+ Default is 0.
+ </column>
+
+ <column name="options" key="ttl">
+ Optional. The TTL to be set on the encapsulating packet. It may also
+ be the word <code>inherit</code>, in which case the TTL will be copied
+ from the inner packet if it is IPv4 or IPv6 (otherwise it will be the
+ system default, typically 64). Default is the system default TTL.
+ </column>
+
+ <column name="options" key="df_inherit" type='{"type": "boolean"}'>
+ Optional. If enabled, the Don't Fragment bit will be copied from the
+ inner IP headers (those of the encapsulated traffic) to the outer
+ (tunnel) headers. Default is disabled; set to <code>true</code> to
+ enable.
+ </column>
+
+ <column name="options" key="df_default"
+ type='{"type": "boolean"}'>
+ Optional. If enabled, the Don't Fragment bit will be set by default on
+ tunnel headers if the <code>df_inherit</code> option is not set, or if
+ the encapsulated packet is not IP. Default is enabled; set to
+ <code>false</code> to disable.
+ </column>
+
+ <column name="options" key="pmtud" type='{"type": "boolean"}'>
+ Optional. Enable tunnel path MTU discovery. If enabled ``ICMP
+ Destination Unreachable - Fragmentation Needed'' messages will be
+ generated for IPv4 packets with the DF bit set and IPv6 packets above
+ the minimum MTU if the packet size exceeds the path MTU minus the size
+ of the tunnel headers. Note that this option causes behavior that is
+ typically reserved for routers and therefore is not entirely in
+ compliance with the IEEE 802.1D specification for bridges. Default is
+ enabled; set to <code>false</code> to disable.
+ </column>
+
+ <group title="Tunnel Options: gre only">
+ <p>
+ Only <code>gre</code> interfaces support these options.
+ </p>
+
+ <column name="options" key="header_cache" type='{"type": "boolean"}'>
+ Enable caching of tunnel headers and the output path. This can lead
+ to a significant performance increase without changing behavior. In
+ general it should not be necessary to adjust this setting. However,
+ the caching can bypass certain components of the IP stack (such as
+ <code>iptables</code>) and it may be useful to disable it if these
+ features are required or as a debugging measure. Default is enabled,
+ set to <code>false</code> to disable.
+ </column>
+ </group>
+
+ <group title="Tunnel Options: gre and ipsec_gre only">
+ <p>
+ Only <code>gre</code> and <code>ipsec_gre</code> interfaces support
+ these options.
+ </p>
+
+ <column name="options" key="csum" type='{"type": "boolean"}'>
+ <p>
+ Optional. Compute GRE checksums on outgoing packets. Default is
+ disabled, set to <code>true</code> to enable. Checksums present on
+ incoming packets will be validated regardless of this setting.
+ </p>
+
+ <p>
+ GRE checksums impose a significant performance penalty because they
+ cover the entire packet. The encapsulated L3, L4, and L7 packet
+ contents typically have their own checksums, so this additional
+ checksum only adds value for the GRE and encapsulated L2 headers.
+ </p>
+
+ <p>
+ This option is supported for <code>ipsec_gre</code>, but not useful
+ because GRE checksums are weaker than, and redundant with, IPsec
+ payload authentication.
+ </p>
+ </column>
+ </group>
+
+ <group title="Tunnel Options: ipsec_gre only">
+ <p>
+ Only <code>ipsec_gre</code> interfaces support these options.
+ </p>
+
+ <column name="options" key="peer_cert">
+ Required for certificate authentication. A string containing the
+ peer's certificate in PEM format. Additionally the host's
+ certificate must be specified with the <code>certificate</code>
+ option.
+ </column>
+
+ <column name="options" key="certificate">
+ Required for certificate authentication. The name of a PEM file
+ containing a certificate that will be presented to the peer during
+ authentication.
+ </column>
+
+ <column name="options" key="private_key">
+ Optional for certificate authentication. The name of a PEM file
+ containing the private key associated with <code>certificate</code>.
+ If <code>certificate</code> contains the private key, this option may
+ be omitted.
+ </column>
+
+ <column name="options" key="psk">
+ Required for pre-shared key authentication. Specifies a pre-shared
+ key for authentication that must be identical on both sides of the
+ tunnel.
+ </column>
+ </group>
+ </group>
+
+ <group title="Patch Options">
+ <p>
+ Only <code>patch</code> interfaces support these options.
+ </p>
+
+ <column name="options" key="peer">
+ The <ref column="name"/> of the <ref table="Interface"/> for the other
+ side of the patch. The named <ref table="Interface"/>'s own
+ <code>peer</code> option must specify this <ref table="Interface"/>'s
+ name. That is, the two patch interfaces must have reversed <ref
+ column="name"/> and <code>peer</code> values.
+ </column>
+ </group>
+
+ <group title="Interface Status">
+ <p>
+ Status information about interfaces attached to bridges, updated every
+ 5 seconds. Not all interfaces have all of these properties; virtual
+ interfaces don't have a link speed, for example. Non-applicable
+ columns will have empty values.
+ </p>
+ <column name="admin_state">
+ <p>
+ The administrative state of the physical network link.
+ </p>
+ </column>
+
+ <column name="link_state">
+ <p>
+ The observed state of the physical network link. This is ordinarily
+ the link's carrier status. If the interface's <ref table="Port"/> is
+ a bond configured for miimon monitoring, it is instead the network
+ link's miimon status.
+ </p>
+ </column>
+
+ <column name="link_resets">
+ <p>
+ The number of times Open vSwitch has observed the
+ <ref column="link_state"/> of this <ref table="Interface"/> change.
+ </p>
+ </column>
+
+ <column name="link_speed">
+ <p>
+ The negotiated speed of the physical network link.
+ Valid values are positive integers greater than 0.
+ </p>
+ </column>
+
+ <column name="duplex">
+ <p>
+ The duplex mode of the physical network link.
+ </p>
+ </column>
+
+ <column name="mtu">
+ <p>
+ The MTU (maximum transmission unit); i.e. the largest
+ amount of data that can fit into a single Ethernet frame.
+ The standard Ethernet MTU is 1500 bytes. Some physical media
+ and many kinds of virtual interfaces can be configured with
+ higher MTUs.
+ </p>
+ <p>
+ This column will be empty for an interface that does not
+ have an MTU as, for example, some kinds of tunnels do not.
+ </p>
+ </column>
+
+ <column name="lacp_current">
+ Boolean value indicating LACP status for this interface. If true, this
+ interface has current LACP information about its LACP partner. This
+ information may be used to monitor the health of interfaces in a LACP
+ enabled port. This column will be empty if LACP is not enabled.
+ </column>
+
+ <column name="status">
+ Key-value pairs that report port status. Supported status values are
+ <ref column="type"/>-dependent; some interfaces may not have a valid
+ <ref column="status" key="driver_name"/>, for example.
+ </column>
+
+ <column name="status" key="driver_name">
+ The name of the device driver controlling the network adapter.
+ </column>
+
+ <column name="status" key="driver_version">
+ The version string of the device driver controlling the network
+ adapter.
+ </column>
+
+ <column name="status" key="firmware_version">
+ The version string of the network adapter's firmware, if available.
+ </column>
+
+ <column name="status" key="source_ip">
+ The source IP address used for an IPv4 tunnel end-point, such as
+ <code>gre</code> or <code>capwap</code>.
+ </column>
+
+ <column name="status" key="tunnel_egress_iface">
+ Egress interface for tunnels. Currently only relevant for GRE and
+ CAPWAP tunnels. On Linux systems, this column will show the name of
+ the interface which is responsible for routing traffic destined for the
+ configured <ref column="options" key="remote_ip"/>. This could be an
+ internal interface such as a bridge port.
+ </column>
+
+ <column name="status" key="tunnel_egress_iface_carrier"
+ type='{"type": "string", "enum": ["set", ["down", "up"]]}'>
+ Whether carrier is detected on <ref column="status"
+ key="tunnel_egress_iface"/>.
</column>
</group>
+ <group title="Statistics">
+ <p>
+ Key-value pairs that report interface statistics. The current
+ implementation updates these counters periodically. Future
+ implementations may update them when an interface is created, when they
+ are queried (e.g. using an OVSDB <code>select</code> operation), and
+ just before an interface is deleted due to virtual interface hot-unplug
+ or VM shutdown, and perhaps at other times, but not on any regular
+ periodic basis.
+ </p>
+ <p>
+ These are the same statistics reported by OpenFlow in its <code>struct
+ ofp_port_stats</code> structure. If an interface does not support a
+ given statistic, then that pair is omitted.
+ </p>
+ <group title="Statistics: Successful transmit and receive counters">
+ <column name="statistics" key="rx_packets">
+ Number of received packets.
+ </column>
+ <column name="statistics" key="rx_bytes">
+ Number of received bytes.
+ </column>
+ <column name="statistics" key="tx_packets">
+ Number of transmitted packets.
+ </column>
+ <column name="statistics" key="tx_bytes">
+ Number of transmitted bytes.
+ </column>
+ </group>
+ <group title="Statistics: Receive errors">
+ <column name="statistics" key="rx_dropped">
+ Number of packets dropped by RX.
+ </column>
+ <column name="statistics" key="rx_frame_err">
+ Number of frame alignment errors.
+ </column>
+ <column name="statistics" key="rx_over_err">
+ Number of packets with RX overrun.
+ </column>
+ <column name="statistics" key="rx_crc_err">
+ Number of CRC errors.
+ </column>
+ <column name="statistics" key="rx_errors">
+ Total number of receive errors, greater than or equal to the sum of
+ the above.
+ </column>
+ </group>
+ <group title="Statistics: Transmit errors">
+ <column name="statistics" key="tx_dropped">
+ Number of packets dropped by TX.
+ </column>
+ <column name="statistics" key="collisions">
+ Number of collisions.
+ </column>
+ <column name="statistics" key="tx_errors">
+ Total number of transmit errors, greater than or equal to the sum of
+ the above.
+ </column>
+ </group>
+ </group>
+
<group title="Ingress Policing">
<p>
These settings control ingress policing for packets received on this
</p>
</column>
- <column name="ingress_policing_burst">
- <p>Maximum burst size for data received on this interface, in kb. The
- default burst size if set to <code>0</code> is 1000 kb. This value
- has no effect if <ref column="ingress_policing_rate"/>
- is <code>0</code>.</p>
- <p>
- Specifying a larger burst size lets the algorithm be more forgiving,
- which is important for protocols like TCP that react severely to
- dropped packets. The burst size should be at least the size of the
- interface's MTU. Specifying a value that is numerically at least as
- large as 10% of <ref column="ingress_policing_rate"/> helps TCP come
- closer to achieving the full rate.
- </p>
- </column>
- </group>
+ <column name="ingress_policing_burst">
+ <p>Maximum burst size for data received on this interface, in kb. The
+ default burst size if set to <code>0</code> is 1000 kb. This value
+ has no effect if <ref column="ingress_policing_rate"/>
+ is <code>0</code>.</p>
+ <p>
+ Specifying a larger burst size lets the algorithm be more forgiving,
+ which is important for protocols like TCP that react severely to
+ dropped packets. The burst size should be at least the size of the
+ interface's MTU. Specifying a value that is numerically at least as
+ large as 10% of <ref column="ingress_policing_rate"/> helps TCP come
+ closer to achieving the full rate.
+ </p>
+ </column>
+ </group>
+
+ <group title="Connectivity Fault Management">
+ <p>
+ 802.1ag Connectivity Fault Management (CFM) allows a group of
+ Maintenance Points (MPs) called a Maintenance Association (MA) to
+ detect connectivity problems with each other. MPs within a MA should
+ have complete and exclusive interconnectivity. This is verified by
+ occasionally broadcasting Continuity Check Messages (CCMs) at a
+ configurable transmission interval.
+ </p>
+
+ <p>
+ According to the 802.1ag specification, each Maintenance Point should
+ be configured out-of-band with a list of Remote Maintenance Points it
+ should have connectivity to. Open vSwitch differs from the
+ specification in this area. It simply assumes the link is faulted if
+ no Remote Maintenance Points are reachable, and considers it not
+ faulted otherwise.
+ </p>
+
+ <column name="cfm_mpid">
+ A Maintenance Point ID (MPID) uniquely identifies each endpoint within
+ a Maintenance Association. The MPID is used to identify this endpoint
+ to other Maintenance Points in the MA. Each end of a link being
+ monitored should have a different MPID. Must be configured to enable
+ CFM on this <ref table="Interface"/>.
+ </column>
+
+ <column name="cfm_fault">
+ <p>
+ Indicates a connectivity fault triggered by an inability to receive
+ heartbeats from any remote endpoint. When a fault is triggered on
+ <ref table="Interface"/>s participating in bonds, they will be
+ disabled.
+ </p>
+ <p>
+ Faults can be triggered for several reasons. Most importantly they
+ are triggered when no CCMs are received for a period of 3.5 times the
+ transmission interval. Faults are also triggered when any CCMs
+ indicate that a Remote Maintenance Point is not receiving CCMs but
+ able to send them. Finally, a fault is triggered if a CCM is
+ received which indicates unexpected configuration. Notably, this
+ case arises when a CCM is received which advertises the local MPID.
+ </p>
+ </column>
+
+ <column name="cfm_fault_status" key="recv">
+ Indicates a CFM fault was triggered due to a lack of CCMs received on
+ the <ref table="Interface"/>.
+ </column>
+
+ <column name="cfm_fault_status" key="rdi">
+ Indicates a CFM fault was triggered due to the reception of a CCM with
+ the RDI bit flagged. Endpoints set the RDI bit in their CCMs when they
+ are not receiving CCMs themselves. This typically indicates a
+ unidirectional connectivity failure.
+ </column>
+
+ <column name="cfm_fault_status" key="maid">
+ Indicates a CFM fault was triggered due to the reception of a CCM with
+ a MAID other than the one Open vSwitch uses. CFM broadcasts are tagged
+ with an identification number in addition to the MPID called the MAID.
+ Open vSwitch only supports receiving CCM broadcasts tagged with the
+ MAID it uses internally.
+ </column>
+
+ <column name="cfm_fault_status" key="loopback">
+ Indicates a CFM fault was triggered due to the reception of a CCM
+ advertising the same MPID configured in the <ref column="cfm_mpid"/>
+ column of this <ref table="Interface"/>. This may indicate a loop in
+ the network.
+ </column>
+
+ <column name="cfm_fault_status" key="overflow">
+ Indicates a CFM fault was triggered because the CFM module received
+ CCMs from more remote endpoints than it can keep track of.
+ </column>
+
+ <column name="cfm_fault_status" key="override">
+ Indicates a CFM fault was manually triggered by an administrator using
+ an <code>ovs-appctl</code> command.
+ </column>
+
+ <column name="cfm_fault_status" key="interval">
+ Indicates a CFM fault was triggered due to the reception of a CCM
+ frame having an invalid interval.
+ </column>
+
+ <column name="cfm_health">
+ <p>
+ Indicates the health of the interface as a percentage of CCM frames
+ received over 21 <ref column="other_config" key="cfm_interval"/>s.
+ The health of an interface is undefined if it is communicating with
+ more than one <ref column="cfm_remote_mpids"/>. It reduces if
+ healthy heartbeats are not received at the expected rate, and
+ gradually improves as healthy heartbeats are received at the desired
+ rate. Every 21 <ref column="other_config" key="cfm_interval"/>s, the
+ health of the interface is refreshed.
+ </p>
+ <p>
+ As mentioned above, the faults can be triggered for several reasons.
+ The link health will deteriorate even if heartbeats are received but
+ they are reported to be unhealthy. An unhealthy heartbeat in this
+ context is a heartbeat for which either some fault is set or is out
+ of sequence. The interface health can be 100 only on receiving
+ healthy heartbeats at the desired rate.
+ </p>
+ </column>
+
+ <column name="cfm_remote_mpids">
+ When CFM is properly configured, Open vSwitch will occasionally
+ receive CCM broadcasts. These broadcasts contain the MPID of the
+ sending Maintenance Point. The list of MPIDs from which this
+ <ref table="Interface"/> is receiving broadcasts from is regularly
+ collected and written to this column.
+ </column>
+
+ <column name="other_config" key="cfm_interval"
+ type='{"type": "integer"}'>
+ <p>
+ The interval, in milliseconds, between transmissions of CFM
+ heartbeats. Three missed heartbeat receptions indicate a
+ connectivity fault.
+ </p>
+
+ <p>
+ In standard operation only intervals of 3, 10, 100, 1,000, 10,000,
+ 60,000, or 600,000 ms are supported. Other values will be rounded
+ down to the nearest value on the list. Extended mode (see <ref
+ column="other_config" key="cfm_extended"/>) supports any interval up
+ to 65,535 ms. In either mode, the default is 1000 ms.
+ </p>
+
+ <p>We do not recommend using intervals less than 100 ms.</p>
+ </column>
+
+ <column name="other_config" key="cfm_extended"
+ type='{"type": "boolean"}'>
+ When <code>true</code>, the CFM module operates in extended mode. This
+ causes it to use a nonstandard destination address to avoid conflicting
+ with compliant implementations which may be running concurrently on the
+ network. Furthermore, extended mode increases the accuracy of the
+ <code>cfm_interval</code> configuration parameter by breaking wire
+ compatibility with 802.1ag compliant implementations. Defaults to
+ <code>false</code>.
+ </column>
+ <column name="other_config" key="cfm_opstate"
+ type='{"type": "string", "enum": ["set", ["down", "up"]]}'>
+ When <code>down</code>, the CFM module marks all CCMs it generates as
+ operationally down without triggering a fault. This allows remote
+ maintenance points to choose not to forward traffic to the
+ <ref table="Interface"/> on which this CFM module is running.
+ Currently, in Open vSwitch, the opdown bit of CCMs affects
+ <ref table="Interface"/>s participating in bonds, and the bundle
+ OpenFlow action. This setting is ignored when CFM is not in extended
+ mode. Defaults to <code>up</code>.
+ </column>
+
+ <column name="other_config" key="cfm_ccm_vlan"
+ type='{"type": "integer", "minInteger": 1, "maxInteger": 4095}'>
+ When set, the CFM module will apply a VLAN tag to all CCMs it generates
+ with the given value. May be the string <code>random</code> in which
+ case each CCM will be tagged with a different randomly generated VLAN.
+ </column>
+
+ <column name="other_config" key="cfm_ccm_pcp"
+ type='{"type": "integer", "minInteger": 1, "maxInteger": 7}'>
+ When set, the CFM module will apply a VLAN tag to all CCMs it generates
+ with the given PCP value. The VLAN ID of the tag is governed by the
+ value of <ref column="other_config" key="cfm_ccm_vlan"/>. If
+ <ref column="other_config" key="cfm_ccm_vlan"/> is unset, a VLAN ID of
+ zero is used.
+ </column>
+
+ </group>
+
+ <group title="Bonding Configuration">
+ <column name="other_config" key="bond-stable-id"
+ type='{"type": "integer", "minInteger": 1}'>
+ Used in <code>stable</code> bond mode to make slave
+ selection decisions. Allocating <ref column="other_config"
+ key="bond-stable-id"/> values consistently across interfaces
+ participating in a bond will guarantee consistent slave selection
+ decisions across <code>ovs-vswitchd</code> instances when using
+ <code>stable</code> bonding mode.
+ </column>
+
+ <column name="other_config" key="lacp-port-id"
+ type='{"type": "integer", "minInteger": 1, "maxInteger": 65535}'>
+ The LACP port ID of this <ref table="Interface"/>. Port IDs are
+ used in LACP negotiations to identify individual ports
+ participating in a bond.
+ </column>
+
+ <column name="other_config" key="lacp-port-priority"
+ type='{"type": "integer", "minInteger": 1, "maxInteger": 65535}'>
+ The LACP port priority of this <ref table="Interface"/>. In LACP
+ negotiations <ref table="Interface"/>s with numerically lower
+ priorities are preferred for aggregation.
+ </column>
+
+ <column name="other_config" key="lacp-aggregation-key"
+ type='{"type": "integer", "minInteger": 1, "maxInteger": 65535}'>
+ The LACP aggregation key of this <ref table="Interface"/>. <ref
+ table="Interface"/>s with different aggregation keys may not be active
+ within a given <ref table="Port"/> at the same time.
+ </column>
+ </group>
+
+ <group title="Virtual Machine Identifiers">
+ <p>
+ These key-value pairs specifically apply to an interface that
+ represents a virtual Ethernet interface connected to a virtual
+ machine. These key-value pairs should not be present for other types
+ of interfaces. Keys whose names end in <code>-uuid</code> have
+ values that uniquely identify the entity in question. For a Citrix
+ XenServer hypervisor, these values are UUIDs in RFC 4122 format.
+ Other hypervisors may use other formats.
+ </p>
+
+ <column name="external_ids" key="attached-mac">
+ The MAC address programmed into the ``virtual hardware'' for this
+ interface, in the form
+ <var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>.
+ For Citrix XenServer, this is the value of the <code>MAC</code> field
+ in the VIF record for this interface.
+ </column>
+
+ <column name="external_ids" key="iface-id">
+ A system-unique identifier for the interface. On XenServer, this will
+ commonly be the same as <ref column="external_ids" key="xs-vif-uuid"/>.
+ </column>
+
+ <column name="external_ids" key="iface-status"
+ type='{"type": "string",
+ "enum": ["set", ["active", "inactive"]]}'>
+ <p>
+ Hypervisors may sometimes have more than one interface associated
+ with a given <ref column="external_ids" key="iface-id"/>, only one of
+ which is actually in use at a given time. For example, in some
+ circumstances XenServer has both a ``tap'' and a ``vif'' interface
+ for a single <ref column="external_ids" key="iface-id"/>, but only
+ uses one of them at a time. A hypervisor that behaves this way must
+ mark the currently in use interface <code>active</code> and the
+ others <code>inactive</code>. A hypervisor that never has more than
+ one interface for a given <ref column="external_ids" key="iface-id"/>
+ may mark that interface <code>active</code> or omit <ref
+ column="external_ids" key="iface-status"/> entirely.
+ </p>
+
+ <p>
+ During VM migration, a given <ref column="external_ids"
+ key="iface-id"/> might transiently be marked <code>active</code> on
+ two different hypervisors. That is, <code>active</code> means that
+ this <ref column="external_ids" key="iface-id"/> is the active
+ instance within a single hypervisor, not in a broader scope.
+ </p>
+ </column>
+
+ <column name="external_ids" key="xs-vif-uuid">
+ The virtual interface associated with this interface.
+ </column>
+
+ <column name="external_ids" key="xs-network-uuid">
+ The virtual network to which this interface is attached.
+ </column>
+
+ <column name="external_ids" key="vm-id">
+ The VM to which this interface belongs. On XenServer, this will be the
+ same as <ref column="external_ids" key="xs-vm-uuid"/>.
+ </column>
+
+ <column name="external_ids" key="xs-vm-uuid">
+ The VM to which this interface belongs.
+ </column>
+ </group>
+
+ <group title="VLAN Splinters">
+ <p>
+ The ``VLAN splinters'' feature increases Open vSwitch compatibility
+ with buggy network drivers in old versions of Linux that do not
+ properly support VLANs when VLAN devices are not used, at some cost
+ in memory and performance.
+ </p>
+
+ <p>
+ When VLAN splinters are enabled on a particular interface, Open vSwitch
+ creates a VLAN device for each in-use VLAN. For sending traffic tagged
+ with a VLAN on the interface, it substitutes the VLAN device. Traffic
+ received on the VLAN device is treated as if it had been received on
+ the interface on the particular VLAN.
+ </p>
+
+ <p>
+ VLAN splinters consider a VLAN to be in use if:
+ </p>
+
+ <ul>
+ <li>
+ The VLAN is the <ref table="Port" column="tag"/> value in any <ref
+ table="Port"/> record.
+ </li>
+
+ <li>
+ The VLAN is listed within the <ref table="Port" column="trunks"/>
+ column of the <ref table="Port"/> record of an interface on which
+ VLAN splinters are enabled.
+
+ An empty <ref table="Port" column="trunks"/> does not influence the
+ in-use VLANs: creating 4,096 VLAN devices is impractical because it
+ will exceed the current 1,024 port per datapath limit.
+ </li>
+
+ <li>
+ An OpenFlow flow within any bridge matches the VLAN.
+ </li>
+ </ul>
+
+ <p>
+ The same set of in-use VLANs applies to every interface on which VLAN
+ splinters are enabled. That is, the set is not chosen separately for
+ each interface but selected once as the union of all in-use VLANs based
+ on the rules above.
+ </p>
+
+ <p>
+ It does not make sense to enable VLAN splinters on an interface for an
+ access port, or on an interface that is not a physical port.
+ </p>
+
+ <p>
+ VLAN splinters are deprecated. When broken device drivers are no
+ longer in widespread use, we will delete this feature.
+ </p>
+
+ <column name="other_config" key="enable-vlan-splinters"
+ type='{"type": "boolean"}'>
+ <p>
+ Set to <code>true</code> to enable VLAN splinters on this interface.
+ Defaults to <code>false</code>.
+ </p>
+
+ <p>
+ VLAN splinters increase kernel and userspace memory overhead, so do
+ not use them unless they are needed.
+ </p>
+
+ <p>
+ VLAN splinters do not support 802.1p priority tags. Received
+ priorities will appear to be 0, regardless of their actual values,
+ and priorities on transmitted packets will also be cleared to 0.
+ </p>
+ </column>
+ </group>
+
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="other_config"/>
+ <column name="external_ids"/>
+ </group>
+ </table>
+
+ <table name="Flow_Table" title="OpenFlow table configuration">
+ <p>Configuration for a particular OpenFlow table.</p>
+
+ <column name="name">
+ The table's name. Set this column to change the name that controllers
+ will receive when they request table statistics, e.g. <code>ovs-ofctl
+ dump-tables</code>. The name does not affect switch behavior.
+ </column>
+
+ <column name="flow_limit">
+ If set, limits the number of flows that may be added to the table. Open
+ vSwitch may limit the number of flows in a table for other reasons,
+ e.g. due to hardware limitations or for resource availability or
+ performance reasons.
+ </column>
+
+ <column name="overflow_policy">
+ <p>
+ Controls the switch's behavior when an OpenFlow flow table modification
+ request would add flows in excess of <ref column="flow_limit"/>. The
+ supported values are:
+ </p>
+
+ <dl>
+ <dt><code>refuse</code></dt>
+ <dd>
+ Refuse to add the flow or flows. This is also the default policy
+ when <ref column="overflow_policy"/> is unset.
+ </dd>
+
+ <dt><code>evict</code></dt>
+ <dd>
+ Delete the flow that will expire soonest. See <ref column="groups"/>
+ for details.
+ </dd>
+ </dl>
+ </column>
+
+ <column name="groups">
+ <p>
+ When <ref column="overflow_policy"/> is <code>evict</code>, this
+ controls how flows are chosen for eviction when the flow table would
+ otherwise exceed <ref column="flow_limit"/> flows. Its value is a set
+ of NXM fields or sub-fields, each of which takes one of the forms
+ <code><var>field</var>[]</code> or
+ <code><var>field</var>[<var>start</var>..<var>end</var>]</code>,
+ e.g. <code>NXM_OF_IN_PORT[]</code>. Please see
+ <code>nicira-ext.h</code> for a complete list of NXM field names.
+ </p>
+
+ <p>
+ When a flow must be evicted due to overflow, the flow to evict is
+ chosen through an approximation of the following algorithm:
+ </p>
- <group title="Other Features">
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate
- with Open vSwitch, rather than by Open vSwitch itself. System
- integrators should either use the Open vSwitch development
- mailing list to coordinate on common key-value definitions, or
- choose key names that are likely to be unique. The currently
- defined common key-value pairs are:
- <dl>
- <dt><code>attached-mac</code></dt>
- <dd>
- The MAC address programmed into the ``virtual hardware'' for this
- interface, in the form
- <var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>.
- For Citrix XenServer, this is the value of the <code>MAC</code>
- field in the VIF record for this interface.</dd>
- <dt><code>iface-id</code></dt>
- <dd>A system-unique identifier for the interface. On XenServer,
- this will commonly be the same as <code>xs-vif-uuid</code>.</dd>
- </dl>
- <p>
- Additionally the following key-value pairs specifically
- apply to an interface that represents a virtual Ethernet interface
- connected to a virtual machine. These key-value pairs should not be
- present for other types of interfaces. Keys whose names end
- in <code>-uuid</code> have values that uniquely identify the entity
- in question. For a Citrix XenServer hypervisor, these values are
- UUIDs in RFC 4122 format. Other hypervisors may use other
- formats.
- </p>
- <p>The currently defined key-value pairs for XenServer are:</p>
- <dl>
- <dt><code>xs-vif-uuid</code></dt>
- <dd>The virtual interface associated with this interface.</dd>
- <dt><code>xs-network-uuid</code></dt>
- <dd>The virtual network to which this interface is attached.</dd>
- <dt><code>xs-vm-uuid</code></dt>
- <dd>The VM to which this interface belongs.</dd>
- </dl>
- </column>
+ <ol>
+ <li>
+ Divide the flows in the table into groups based on the values of the
+ specified fields or subfields, so that all of the flows in a given
+ group have the same values for those fields. If a flow does not
+ specify a given field, that field's value is treated as 0.
+ </li>
- <column name="other_config">
- Key-value pairs for rarely used interface features. Currently,
- the only keys are for configuring GRE-over-IPsec, which is only
- available through the <code>openvswitch-ipsec</code> package for
- Debian. The currently defined key-value pairs are:
- <dl>
- <dt><code>ipsec_local_ip</code></dt>
- <dd>Required key for GRE-over-IPsec interfaces. Additionally,
- the <ref column="type"/> must be <code>gre</code> and the
- <code>ipsec_psk</code> <ref column="other_config"/> key must
- be set. The <code>in_key</code>, <code>out_key</code>, and
- <code>key</code> <ref column="options"/> must not be
- set.</dd>
- <dt><code>ipsec_psk</code></dt>
- <dd>Required key for GRE-over-IPsec interfaces. Specifies a
- pre-shared key for authentication that must be identical on
- both sides of the tunnel. Additionally, the
- <code>ipsec_local_ip</code> key must also be set.</dd>
- </dl>
- </column>
+ <li>
+ Consider the flows in the largest group, that is, the group that
+ contains the greatest number of flows. If two or more groups all
+ have the same largest number of flows, consider the flows in all of
+ those groups.
+ </li>
- <column name="statistics">
- <p>
- Key-value pairs that report interface statistics. The current
- implementation updates these counters periodically. In the future,
- we plan to, instead, update them when an interface is created, when
- they are queried (e.g. using an OVSDB <code>select</code> operation),
- and just before an interface is deleted due to virtual interface
- hot-unplug or VM shutdown, and perhaps at other times, but not on any
- regular periodic basis.</p>
- <p>
- The currently defined key-value pairs are listed below. These are
- the same statistics reported by OpenFlow in its <code>struct
- ofp_port_stats</code> structure. If an interface does not support a
- given statistic, then that pair is omitted.</p>
- <ul>
- <li>
- Successful transmit and receive counters:
- <dl>
- <dt><code>rx_packets</code></dt>
- <dd>Number of received packets.</dd>
- <dt><code>rx_bytes</code></dt>
- <dd>Number of received bytes.</dd>
- <dt><code>tx_packets</code></dt>
- <dd>Number of transmitted packets.</dd>
- <dt><code>tx_bytes</code></dt>
- <dd>Number of transmitted bytes.</dd>
- </dl>
- </li>
- <li>
- Receive errors:
- <dl>
- <dt><code>rx_dropped</code></dt>
- <dd>Number of packets dropped by RX.</dd>
- <dt><code>rx_frame_err</code></dt>
- <dd>Number of frame alignment errors.</dd>
- <dt><code>rx_over_err</code></dt>
- <dd>Number of packets with RX overrun.</dd>
- <dt><code>rx_crc_err</code></dt>
- <dd>Number of CRC errors.</dd>
- <dt><code>rx_errors</code></dt>
- <dd>
- Total number of receive errors, greater than or equal
- to the sum of the above.
- </dd>
- </dl>
- </li>
- <li>
- Transmit errors:
- <dl>
- <dt><code>tx_dropped</code></dt>
- <dd>Number of packets dropped by TX.</dd>
- <dt><code>collisions</code></dt>
- <dd>Number of collisions.</dd>
- <dt><code>tx_errors</code></dt>
- <dd>
- Total number of transmit errors, greater
- than or equal to the sum of the above.
- </dd>
- </dl>
- </li>
- </ul>
- </column>
- </group>
+ <li>
+ Among the flows under consideration, choose the flow that expires
+ soonest for eviction.
+ </li>
+ </ol>
+
+ <p>
+ The eviction process only considers flows that have an idle timeout or
+ a hard timeout. That is, eviction never deletes permanent flows.
+ (Permanent flows do count against <ref column="flow_limit"/>.
+ </p>
+
+ <p>
+ Open vSwitch ignores any invalid or unknown field specifications.
+ </p>
+
+ <p>
+ When <ref column="overflow_policy"/> is not <code>evict</code>, this
+ column has no effect.
+ </p>
+ </column>
</table>
<table name="QoS" title="Quality of Service configuration">
<p>Quality of Service (QoS) configuration for each Port that
- references it.</p>
+ references it.</p>
<column name="type">
- <p>The type of QoS to implement. The <ref table="Open_vSwitch"
- column="capabilities"/> column in the <ref table="Open_vSwitch"/> table
- identifies the types that a switch actually supports. The currently
- defined types are listed below:</p>
+ <p>The type of QoS to implement. The currently defined types are
+ listed below:</p>
<dl>
<dt><code>linux-htb</code></dt>
<dd>
<column name="queues">
<p>A map from queue numbers to <ref table="Queue"/> records. The
- supported range of queue numbers depend on <ref column="type"/>. The
- queue numbers are the same as the <code>queue_id</code> used in
- OpenFlow in <code>struct ofp_action_enqueue</code> and other
- structures. Queue 0 is used by OpenFlow output actions that do not
- specify a specific queue.</p>
- </column>
+ supported range of queue numbers depend on <ref column="type"/>. The
+ queue numbers are the same as the <code>queue_id</code> used in
+ OpenFlow in <code>struct ofp_action_enqueue</code> and other
+ structures.</p>
- <column name="other_config">
- <p>Key-value pairs for configuring QoS features that depend on
- <ref column="type"/>.</p>
- <p>The <code>linux-htb</code> and <code>linux-hfsc</code> classes support
- the following key-value pairs:</p>
- <dl>
- <dt><code>max-rate</code></dt>
- <dd>Maximum rate shared by all queued traffic, in bit/s.
- Optional. If not specified, for physical interfaces, the
- default is the link rate. For other interfaces or if the
- link rate cannot be determined, the default is currently 100
- Mbps.</dd>
- </dl>
+ <p>
+ Queue 0 is the ``default queue.'' It is used by OpenFlow output
+ actions when no specific queue has been set. When no configuration for
+ queue 0 is present, it is automatically configured as if a <ref
+ table="Queue"/> record with empty <ref table="Queue" column="dscp"/>
+ and <ref table="Queue" column="other_config"/> columns had been
+ specified.
+ (Before version 1.6, Open vSwitch would leave queue 0 unconfigured in
+ this case. With some queuing disciplines, this dropped all packets
+ destined for the default queue.)
+ </p>
</column>
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate with Open
- vSwitch, rather than by Open vSwitch itself. System integrators should
- either use the Open vSwitch development mailing list to coordinate on
- common key-value definitions, or choose key names that are likely to be
- unique. No common key-value pairs are currently defined.
- </column>
+ <group title="Configuration for linux-htb and linux-hfsc">
+ <p>
+ The <code>linux-htb</code> and <code>linux-hfsc</code> classes support
+ the following key-value pair:
+ </p>
+
+ <column name="other_config" key="max-rate" type='{"type": "integer"}'>
+ Maximum rate shared by all queued traffic, in bit/s. Optional. If not
+ specified, for physical interfaces, the default is the link rate. For
+ other interfaces or if the link rate cannot be determined, the default
+ is currently 100 Mbps.
+ </column>
+ </group>
+
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="other_config"/>
+ <column name="external_ids"/>
+ </group>
</table>
<table name="Queue" title="QoS output queue.">
<p>A configuration for a port output queue, used in configuring Quality of
- Service (QoS) features. May be referenced by <ref column="queues"
- table="QoS"/> column in <ref table="QoS"/> table.</p>
-
- <column name="other_config">
- <p>Key-value pairs for configuring the output queue. The supported
- key-value pairs and their meanings depend on the <ref column="type"/>
- of the <ref column="QoS"/> records that reference this row.</p>
- <p>The key-value pairs defined for <ref table="QoS"/> <ref table="QoS"
- column="type"/> of <code>min-rate</code> are:</p>
- <dl>
- <dt><code>min-rate</code></dt>
- <dd>Minimum guaranteed bandwidth, in bit/s. Required. The
- floor value is 1500 bytes/s (12,000 bit/s).</dd>
- </dl>
- <p>The key-value pairs defined for <ref table="QoS"/> <ref table="QoS"
- column="type"/> of <code>linux-htb</code> are:</p>
- <dl>
- <dt><code>min-rate</code></dt>
- <dd>Minimum guaranteed bandwidth, in bit/s. Required.</dd>
- <dt><code>max-rate</code></dt>
- <dd>Maximum allowed bandwidth, in bit/s. Optional. If specified, the
- queue's rate will not be allowed to exceed the specified value, even
- if excess bandwidth is available. If unspecified, defaults to no
- limit.</dd>
- <dt><code>burst</code></dt>
- <dd>Burst size, in bits. This is the maximum amount of ``credits''
- that a queue can accumulate while it is idle. Optional. Details of
- the <code>linux-htb</code> implementation require a minimum burst
- size, so a too-small <code>burst</code> will be silently
- ignored.</dd>
- <dt><code>priority</code></dt>
- <dd>A nonnegative 32-bit integer. Defaults to 0 if
- unspecified. A queue with a smaller <code>priority</code>
- will receive all the excess bandwidth that it can use before
- a queue with a larger value receives any. Specific priority
- values are unimportant; only relative ordering matters.</dd>
- </dl>
- <p>The key-value pairs defined for <ref table="QoS"/> <ref table="QoS"
- column="type"/> of <code>linux-hfsc</code> are:</p>
- <dl>
- <dt><code>min-rate</code></dt>
- <dd>Minimum guaranteed bandwidth, in bit/s. Required.</dd>
- <dt><code>max-rate</code></dt>
- <dd>Maximum allowed bandwidth, in bit/s. Optional. If specified, the
- queue's rate will not be allowed to exceed the specified value, even
- if excess bandwidth is available. If unspecified, defaults to no
- limit.</dd>
- </dl>
+ Service (QoS) features. May be referenced by <ref column="queues"
+ table="QoS"/> column in <ref table="QoS"/> table.</p>
+
+ <column name="dscp">
+ If set, Open vSwitch will mark all traffic egressing this
+ <ref table="Queue"/> with the given DSCP bits. Traffic egressing the
+ default <ref table="Queue"/> is only marked if it was explicitly selected
+ as the <ref table="Queue"/> at the time the packet was output. If unset,
+ the DSCP bits of traffic egressing this <ref table="Queue"/> will remain
+ unchanged.
</column>
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate with Open
- vSwitch, rather than by Open vSwitch itself. System integrators should
- either use the Open vSwitch development mailing list to coordinate on
- common key-value definitions, or choose key names that are likely to be
- unique. No common key-value pairs are currently defined.
- </column>
+ <group title="Configuration for linux-htb QoS">
+ <p>
+ <ref table="QoS"/> <ref table="QoS" column="type"/>
+ <code>linux-htb</code> may use <code>queue_id</code>s less than 61440.
+ It has the following key-value pairs defined.
+ </p>
+
+ <column name="other_config" key="min-rate"
+ type='{"type": "integer", "minInteger": 1}'>
+ Minimum guaranteed bandwidth, in bit/s.
+ </column>
+
+ <column name="other_config" key="max-rate"
+ type='{"type": "integer", "minInteger": 1}'>
+ Maximum allowed bandwidth, in bit/s. Optional. If specified, the
+ queue's rate will not be allowed to exceed the specified value, even
+ if excess bandwidth is available. If unspecified, defaults to no
+ limit.
+ </column>
+
+ <column name="other_config" key="burst"
+ type='{"type": "integer", "minInteger": 1}'>
+ Burst size, in bits. This is the maximum amount of ``credits'' that a
+ queue can accumulate while it is idle. Optional. Details of the
+ <code>linux-htb</code> implementation require a minimum burst size, so
+ a too-small <code>burst</code> will be silently ignored.
+ </column>
+
+ <column name="other_config" key="priority"
+ type='{"type": "integer", "minInteger": 0, "maxInteger": 4294967295}'>
+ A queue with a smaller <code>priority</code> will receive all the
+ excess bandwidth that it can use before a queue with a larger value
+ receives any. Specific priority values are unimportant; only relative
+ ordering matters. Defaults to 0 if unspecified.
+ </column>
+ </group>
+
+ <group title="Configuration for linux-hfsc QoS">
+ <p>
+ <ref table="QoS"/> <ref table="QoS" column="type"/>
+ <code>linux-hfsc</code> may use <code>queue_id</code>s less than 61440.
+ It has the following key-value pairs defined.
+ </p>
+
+ <column name="other_config" key="min-rate"
+ type='{"type": "integer", "minInteger": 1}'>
+ Minimum guaranteed bandwidth, in bit/s.
+ </column>
+
+ <column name="other_config" key="max-rate"
+ type='{"type": "integer", "minInteger": 1}'>
+ Maximum allowed bandwidth, in bit/s. Optional. If specified, the
+ queue's rate will not be allowed to exceed the specified value, even if
+ excess bandwidth is available. If unspecified, defaults to no
+ limit.
+ </column>
+ </group>
+
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="other_config"/>
+ <column name="external_ids"/>
+ </group>
</table>
- <table name="Mirror" title="Port mirroring (SPAN/RSPAN).">
+ <table name="Mirror" title="Port mirroring.">
<p>A port mirror within a <ref table="Bridge"/>.</p>
<p>A port mirror configures a bridge to send selected frames to special
- ``mirrored'' ports, in addition to their normal destinations. Mirroring
- traffic may also be referred to as SPAN or RSPAN, depending on the
- mechanism used for delivery.</p>
+ ``mirrored'' ports, in addition to their normal destinations. Mirroring
+ traffic may also be referred to as SPAN or RSPAN, depending on how
+ the mirrored traffic is sent.</p>
<column name="name">
Arbitrary identifier for the <ref table="Mirror"/>.
</column>
<group title="Selecting Packets for Mirroring">
+ <p>
+ To be selected for mirroring, a given packet must enter or leave the
+ bridge through a selected port and it must also be in one of the
+ selected VLANs.
+ </p>
+
<column name="select_all">
If true, every packet arriving or departing on any port is
selected for mirroring.
</group>
<group title="Mirroring Destination Configuration">
+ <p>
+ These columns are mutually exclusive. Exactly one of them must be
+ nonempty.
+ </p>
+
<column name="output_port">
- <p>Output port for selected packets, if nonempty. Mutually exclusive
- with <ref column="output_vlan"/>.</p>
+ <p>Output port for selected packets, if nonempty.</p>
<p>Specifying a port for mirror output reserves that port exclusively
- for mirroring. No frames other than those selected for mirroring
- will be forwarded to the port, and any frames received on the port
- will be discarded.</p>
- <p>This type of mirroring is sometimes called SPAN.</p>
+ for mirroring. No frames other than those selected for mirroring
+ via this column
+ will be forwarded to the port, and any frames received on the port
+ will be discarded.</p>
+ <p>
+ The output port may be any kind of port supported by Open vSwitch.
+ It may be, for example, a physical port (sometimes called SPAN) or a
+ GRE tunnel.
+ </p>
</column>
<column name="output_vlan">
- <p>Output VLAN for selected packets, if nonempty. Mutually exclusive
- with <ref column="output_port"/>.</p>
+ <p>Output VLAN for selected packets, if nonempty.</p>
<p>The frames will be sent out all ports that trunk
- <ref column="output_vlan"/>, as well as any ports with implicit VLAN
- <ref column="output_vlan"/>. When a mirrored frame is sent out a
- trunk port, the frame's VLAN tag will be set to
- <ref column="output_vlan"/>, replacing any existing tag; when it is
- sent out an implicit VLAN port, the frame will not be tagged. This
- type of mirroring is sometimes called RSPAN.</p>
+ <ref column="output_vlan"/>, as well as any ports with implicit VLAN
+ <ref column="output_vlan"/>. When a mirrored frame is sent out a
+ trunk port, the frame's VLAN tag will be set to
+ <ref column="output_vlan"/>, replacing any existing tag; when it is
+ sent out an implicit VLAN port, the frame will not be tagged. This
+ type of mirroring is sometimes called RSPAN.</p>
+ <p>
+ See the documentation for
+ <ref column="other_config" key="forward-bpdu"/> in the
+ <ref table="Interface"/> table for a list of destination MAC
+ addresses which will not be mirrored to a VLAN to avoid confusing
+ switches that interpret the protocols that they represent.
+ </p>
<p><em>Please note:</em> Mirroring to a VLAN can disrupt a network that
- contains unmanaged switches. Consider an unmanaged physical switch
- with two ports: port 1, connected to an end host, and port 2,
- connected to an Open vSwitch configured to mirror received packets
- into VLAN 123 on port 2. Suppose that the end host sends a packet on
- port 1 that the physical switch forwards to port 2. The Open vSwitch
- forwards this packet to its destination and then reflects it back on
- port 2 in VLAN 123. This reflected packet causes the unmanaged
- physical switch to replace the MAC learning table entry, which
- correctly pointed to port 1, with one that incorrectly points to port
- 2. Afterward, the physical switch will direct packets destined for
- the end host to the Open vSwitch on port 2, instead of to the end
- host on port 1, disrupting connectivity. If mirroring to a VLAN is
- desired in this scenario, then the physical switch must be replaced
- by one that learns Ethernet addresses on a per-VLAN basis. In
- addition, learning should be disabled on the VLAN containing mirrored
- traffic. If this is not done then intermediate switches will learn
- the MAC address of each end host from the mirrored traffic. If
- packets being sent to that end host are also mirrored, then they will
- be dropped since the switch will attempt to send them out the input
- port. Disabling learning for the VLAN will cause the switch to
- correctly send the packet out all ports configured for that VLAN. If
- Open vSwitch is being used as an intermediate switch, learning can be
- disabled by adding the mirrored VLAN to <ref column="flood_vlans"/>
- in the appropriate <ref table="Bridge"/> table or tables.</p>
+ contains unmanaged switches. Consider an unmanaged physical switch
+ with two ports: port 1, connected to an end host, and port 2,
+ connected to an Open vSwitch configured to mirror received packets
+ into VLAN 123 on port 2. Suppose that the end host sends a packet on
+ port 1 that the physical switch forwards to port 2. The Open vSwitch
+ forwards this packet to its destination and then reflects it back on
+ port 2 in VLAN 123. This reflected packet causes the unmanaged
+ physical switch to replace the MAC learning table entry, which
+ correctly pointed to port 1, with one that incorrectly points to port
+ 2. Afterward, the physical switch will direct packets destined for
+ the end host to the Open vSwitch on port 2, instead of to the end
+ host on port 1, disrupting connectivity. If mirroring to a VLAN is
+ desired in this scenario, then the physical switch must be replaced
+ by one that learns Ethernet addresses on a per-VLAN basis. In
+ addition, learning should be disabled on the VLAN containing mirrored
+ traffic. If this is not done then intermediate switches will learn
+ the MAC address of each end host from the mirrored traffic. If
+ packets being sent to that end host are also mirrored, then they will
+ be dropped since the switch will attempt to send them out the input
+ port. Disabling learning for the VLAN will cause the switch to
+ correctly send the packet out all ports configured for that VLAN. If
+ Open vSwitch is being used as an intermediate switch, learning can be
+ disabled by adding the mirrored VLAN to <ref column="flood_vlans"/>
+ in the appropriate <ref table="Bridge"/> table or tables.</p>
+ <p>
+ Mirroring to a GRE tunnel has fewer caveats than mirroring to a
+ VLAN and should generally be preferred.
+ </p>
</column>
</group>
- <group title="Other Features">
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate with Open
- vSwitch, rather than by Open vSwitch itself. System integrators should
- either use the Open vSwitch development mailing list to coordinate on
- common key-value definitions, or choose key names that are likely to be
- unique. No common key-value pairs are currently defined.
+ <group title="Statistics: Mirror counters">
+ <p>
+ Key-value pairs that report mirror statistics.
+ </p>
+ <column name="statistics" key="tx_packets">
+ Number of packets transmitted through this mirror.
</column>
+ <column name="statistics" key="tx_bytes">
+ Number of bytes transmitted through this mirror.
+ </column>
+ </group>
+
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="external_ids"/>
</group>
</table>
<p>
Open vSwitch supports two kinds of OpenFlow controllers:
</p>
-
+
<dl>
<dt>Primary controllers</dt>
<dd>
column in the <ref table="Open_vSwitch"/> table must point to a
valid SSL configuration when this form is used.</p>
<p>SSL support is an optional feature that is not always built as
- part of Open vSwitch.</p>
+ part of Open vSwitch.</p>
</dd>
<dt><code>tcp:<var>ip</var></code>[<code>:<var>port</var></code>]</dt>
<dd>The specified TCP <var>port</var> (default: 6633) on the host at
- the given <var>ip</var>, which must be expressed as an IP address
- (not a DNS name).</dd>
- <dt><code>discover</code></dt>
- <dd>
- <p>Enables controller discovery.</p>
- <p>In controller discovery mode, Open vSwitch broadcasts a DHCP
- request with vendor class identifier <code>OpenFlow</code> across
- all of the bridge's network devices. It will accept any valid
- DHCP reply that has the same vendor class identifier and includes
- a vendor-specific option with code 1 whose contents are a string
- specifying the location of the controller in the same format as
- <ref column="target"/>.</p>
- <p>The DHCP reply may also, optionally, include a vendor-specific
- option with code 2 whose contents are a string specifying the URI
- to the base of the OpenFlow PKI
- (e.g. <code>http://192.168.0.1/openflow/pki</code>). This URI is
- used only for bootstrapping the OpenFlow PKI at initial switch
- setup; <code>ovs-vswitchd</code> does not use it at all.</p>
- </dd>
+ the given <var>ip</var>, which must be expressed as an IP address
+ (not a DNS name).</dd>
</dl>
<p>
The following connection methods are currently supported for service
configuration when this form is used.
</p>
<p>SSL support is an optional feature that is not always built as
- part of Open vSwitch.</p>
+ part of Open vSwitch.</p>
</dd>
<dt><code>ptcp:</code>[<var>port</var>][<code>:<var>ip</var></code>]</dt>
<dd>
</dd>
</dl>
<p>When multiple controllers are configured for a single bridge, the
- <ref column="target"/> values must be unique. Duplicate
- <ref column="target"/> values yield unspecified results.</p>
+ <ref column="target"/> values must be unique. Duplicate
+ <ref column="target"/> values yield unspecified results.</p>
</column>
<column name="connection_mode">
<dl>
<dt><code>in-band</code></dt>
<dd>In this mode, this controller's OpenFlow traffic travels over the
- bridge associated with the controller. With this setting, Open
- vSwitch allows traffic to and from the controller regardless of the
- contents of the OpenFlow flow table. (Otherwise, Open vSwitch
- would never be able to connect to the controller, because it did
- not have a flow to enable it.) This is the most common connection
- mode because it is not necessary to maintain two independent
- networks.</dd>
+ bridge associated with the controller. With this setting, Open
+ vSwitch allows traffic to and from the controller regardless of the
+ contents of the OpenFlow flow table. (Otherwise, Open vSwitch
+ would never be able to connect to the controller, because it did
+ not have a flow to enable it.) This is the most common connection
+ mode because it is not necessary to maintain two independent
+ networks.</dd>
<dt><code>out-of-band</code></dt>
<dd>In this mode, OpenFlow traffic uses a control network separate
- from the bridge associated with this controller, that is, the
- bridge does not use any of its own network devices to communicate
- with the controller. The control network must be configured
- separately, before or after <code>ovs-vswitchd</code> is started.
+ from the bridge associated with this controller, that is, the
+ bridge does not use any of its own network devices to communicate
+ with the controller. The control network must be configured
+ separately, before or after <code>ovs-vswitchd</code> is started.
</dd>
</dl>
- <p>If not specified, the default is implementation-specific. If
- <ref column="target"/> is <code>discover</code>, the connection mode
- is always treated as <code>in-band</code> regardless of the actual
- setting.</p>
+ <p>If not specified, the default is implementation-specific.</p>
</column>
</group>
number of seconds, it will send a probe. If a response is not
received for the same additional amount of time, Open vSwitch
assumes the connection has been broken and attempts to reconnect.
- Default is implementation-specific.
+ Default is implementation-specific. A value of 0 disables
+ inactivity probes.
</column>
</group>
- <group title="OpenFlow Rate Limiting">
- <column name="controller_rate_limit">
- <p>The maximum rate at which packets in unknown flows will be
- forwarded to the OpenFlow controller, in packets per second. This
- feature prevents a single bridge from overwhelming the controller.
- If not specified, the default is implementation-specific.</p>
- <p>In addition, when a high rate triggers rate-limiting, Open
- vSwitch queues controller packets for each port and transmits
- them to the controller at the configured rate. The number of
- queued packets is limited by
- the <ref column="controller_burst_limit"/> value. The packet
- queue is shared fairly among the ports on a bridge.</p><p>Open
- vSwitch maintains two such packet rate-limiters per bridge.
- One of these applies to packets sent up to the controller
- because they do not correspond to any flow. The other applies
- to packets sent up to the controller by request through flow
- actions. When both rate-limiters are filled with packets, the
- actual rate that packets are sent to the controller is up to
- twice the specified rate.</p>
- </column>
+ <group title="Asynchronous Message Configuration">
+ <p>
+ OpenFlow switches send certain messages to controllers spontanenously,
+ that is, not in response to any request from the controller. These
+ messages are called ``asynchronous messages.'' These columns allow
+ asynchronous messages to be limited or disabled to ensure the best use
+ of network resources.
+ </p>
- <column name="controller_burst_limit">
- In conjunction with <ref column="controller_rate_limit"/>,
- the maximum number of unused packet credits that the bridge will
- allow to accumulate, in packets. If not specified, the default
- is implementation-specific.
- </column>
- </group>
+ <column name="enable_async_messages">
+ The OpenFlow protocol enables asynchronous messages at time of
+ connection establishment, which means that a controller can receive
+ asynchronous messages, potentially many of them, even if it turns them
+ off immediately after connecting. Set this column to
+ <code>false</code> to change Open vSwitch behavior to disable, by
+ default, all asynchronous messages. The controller can use the
+ <code>NXT_SET_ASYNC_CONFIG</code> Nicira extension to OpenFlow to turn
+ on any messages that it does want to receive, if any.
+ </column>
- <group title="Additional Discovery Configuration">
- <p>These values are considered only when <ref column="target"/>
- is <code>discover</code>.</p>
+ <column name="controller_rate_limit">
+ <p>
+ The maximum rate at which the switch will forward packets to the
+ OpenFlow controller, in packets per second. This feature prevents a
+ single bridge from overwhelming the controller. If not specified,
+ the default is implementation-specific.
+ </p>
- <column name="discover_accept_regex">
- A POSIX
- extended regular expression against which the discovered controller
- location is validated. The regular expression is implicitly
- anchored at the beginning of the controller location string, as
- if it begins with <code>^</code>. If not specified, the default
- is implementation-specific.
+ <p>
+ In addition, when a high rate triggers rate-limiting, Open vSwitch
+ queues controller packets for each port and transmits them to the
+ controller at the configured rate. The <ref
+ column="controller_burst_limit"/> value limits the number of queued
+ packets. Ports on a bridge share the packet queue fairly.
+ </p>
+
+ <p>
+ Open vSwitch maintains two such packet rate-limiters per bridge: one
+ for packets sent up to the controller because they do not correspond
+ to any flow, and the other for packets sent up to the controller by
+ request through flow actions. When both rate-limiters are filled with
+ packets, the actual rate that packets are sent to the controller is
+ up to twice the specified rate.
+ </p>
</column>
- <column name="discover_update_resolv_conf">
- Whether to update <code>/etc/resolv.conf</code> when the
- controller is discovered. If not specified, the default
- is implementation-specific. Open vSwitch will only modify
- <code>/etc/resolv.conf</code> if the DHCP response that it receives
- specifies one or more DNS servers.
+ <column name="controller_burst_limit">
+ In conjunction with <ref column="controller_rate_limit"/>,
+ the maximum number of unused packet credits that the bridge will
+ allow to accumulate, in packets. If not specified, the default
+ is implementation-specific.
</column>
</group>
<group title="Additional In-Band Configuration">
<p>These values are considered only in in-band control mode (see
- <ref column="connection_mode"/>) and only when <ref column="target"/>
- is not <code>discover</code>. (For controller discovery, the network
- configuration obtained via DHCP is used instead.)</p>
+ <ref column="connection_mode"/>).</p>
<p>When multiple controllers are configured on a single bridge, there
- should be only one set of unique values in these columns. If different
- values are set for these columns in different controllers, the effect
- is unspecified.</p>
+ should be only one set of unique values in these columns. If different
+ values are set for these columns in different controllers, the effect
+ is unspecified.</p>
<column name="local_ip">
The IP address to configure on the local port,
</column>
</group>
- <group title="Other Features">
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate with Open
- vSwitch, rather than by Open vSwitch itself. System integrators should
- either use the Open vSwitch development mailing list to coordinate on
- common key-value definitions, or choose key names that are likely to be
- unique. No common key-value pairs are currently defined.
+ <group title="Controller Status">
+ <column name="is_connected">
+ <code>true</code> if currently connected to this controller,
+ <code>false</code> otherwise.
+ </column>
+
+ <column name="role"
+ type='{"type": "string", "enum": ["set", ["other", "master", "slave"]]}'>
+ <p>The level of authority this controller has on the associated
+ bridge. Possible values are:</p>
+ <dl>
+ <dt><code>other</code></dt>
+ <dd>Allows the controller access to all OpenFlow features.</dd>
+ <dt><code>master</code></dt>
+ <dd>Equivalent to <code>other</code>, except that there may be at
+ most one master controller at a time. When a controller configures
+ itself as <code>master</code>, any existing master is demoted to
+ the <code>slave</code>role.</dd>
+ <dt><code>slave</code></dt>
+ <dd>Allows the controller read-only access to OpenFlow features.
+ Attempts to modify the flow table will be rejected with an
+ error. Slave controllers do not receive OFPT_PACKET_IN or
+ OFPT_FLOW_REMOVED messages, but they do receive OFPT_PORT_STATUS
+ messages.</dd>
+ </dl>
+ </column>
+
+ <column name="status" key="last_error">
+ A human-readable description of the last error on the connection
+ to the controller; i.e. <code>strerror(errno)</code>. This key
+ will exist only if an error has occurred.
+ </column>
+
+ <column name="status" key="state"
+ type='{"type": "string", "enum": ["set", ["VOID", "BACKOFF", "CONNECTING", "ACTIVE", "IDLE"]]}'>
+ <p>
+ The state of the connection to the controller:
+ </p>
+ <dl>
+ <dt><code>VOID</code></dt>
+ <dd>Connection is disabled.</dd>
+
+ <dt><code>BACKOFF</code></dt>
+ <dd>Attempting to reconnect at an increasing period.</dd>
+
+ <dt><code>CONNECTING</code></dt>
+ <dd>Attempting to connect.</dd>
+
+ <dt><code>ACTIVE</code></dt>
+ <dd>Connected, remote host responsive.</dd>
+
+ <dt><code>IDLE</code></dt>
+ <dd>Connection is idle. Waiting for response to keep-alive.</dd>
+ </dl>
+ <p>
+ These values may change in the future. They are provided only for
+ human consumption.
+ </p>
+ </column>
+
+ <column name="status" key="sec_since_connect"
+ type='{"type": "integer", "minInteger": 0}'>
+ The amount of time since this controller last successfully connected to
+ the switch (in seconds). Value is empty if controller has never
+ successfully connected.
+ </column>
+
+ <column name="status" key="sec_since_disconnect"
+ type='{"type": "integer", "minInteger": 1}'>
+ The amount of time since this controller last disconnected from
+ the switch (in seconds). Value is empty if controller has never
+ disconnected.
+ </column>
+ </group>
+
+ <group title="Connection Parameters">
+ <p>
+ Additional configuration for a connection between the controller
+ and the Open vSwitch.
+ </p>
+
+ <column name="other_config" key="dscp"
+ type='{"type": "integer"}'>
+ The Differentiated Service Code Point (DSCP) is specified using 6 bits
+ in the Type of Service (TOS) field in the IP header. DSCP provides a
+ mechanism to classify the network traffic and provide Quality of
+ Service (QoS) on IP networks.
+
+ The DSCP value specified here is used when establishing the connection
+ between the controller and the Open vSwitch. If no value is specified,
+ a default value of 48 is chosen. Valid DSCP values must be in the
+ range 0 to 63.
</column>
</group>
+
+
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="external_ids"/>
+ <column name="other_config"/>
+ </group>
</table>
<table name="Manager" title="OVSDB management connection.">
that describes how Open vSwitch contacts this OVSDB client over the
network:
</p>
-
+
<dl>
<dt><code>in-band</code></dt>
<dd>
will send a probe. If a response is not received for the same
additional amount of time, Open vSwitch assumes the connection has been
broken and attempts to reconnect. Default is implementation-specific.
+ A value of 0 disables inactivity probes.
</column>
</group>
- <group title="Other Features">
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate with Open
- vSwitch, rather than by Open vSwitch itself. System integrators should
- either use the Open vSwitch development mailing list to coordinate on
- common key-value definitions, or choose key names that are likely to be
- unique. No common key-value pairs are currently defined.
+ <group title="Status">
+ <column name="is_connected">
+ <code>true</code> if currently connected to this manager,
+ <code>false</code> otherwise.
+ </column>
+
+ <column name="status" key="last_error">
+ A human-readable description of the last error on the connection
+ to the manager; i.e. <code>strerror(errno)</code>. This key
+ will exist only if an error has occurred.
+ </column>
+
+ <column name="status" key="state"
+ type='{"type": "string", "enum": ["set", ["VOID", "BACKOFF", "CONNECTING", "ACTIVE", "IDLE"]]}'>
+ <p>
+ The state of the connection to the manager:
+ </p>
+ <dl>
+ <dt><code>VOID</code></dt>
+ <dd>Connection is disabled.</dd>
+
+ <dt><code>BACKOFF</code></dt>
+ <dd>Attempting to reconnect at an increasing period.</dd>
+
+ <dt><code>CONNECTING</code></dt>
+ <dd>Attempting to connect.</dd>
+
+ <dt><code>ACTIVE</code></dt>
+ <dd>Connected, remote host responsive.</dd>
+
+ <dt><code>IDLE</code></dt>
+ <dd>Connection is idle. Waiting for response to keep-alive.</dd>
+ </dl>
+ <p>
+ These values may change in the future. They are provided only for
+ human consumption.
+ </p>
+ </column>
+
+ <column name="status" key="sec_since_connect"
+ type='{"type": "integer", "minInteger": 0}'>
+ The amount of time since this manager last successfully connected
+ to the database (in seconds). Value is empty if manager has never
+ successfully connected.
+ </column>
+
+ <column name="status" key="sec_since_disconnect"
+ type='{"type": "integer", "minInteger": 0}'>
+ The amount of time since this manager last disconnected from the
+ database (in seconds). Value is empty if manager has never
+ disconnected.
+ </column>
+
+ <column name="status" key="locks_held">
+ Space-separated list of the names of OVSDB locks that the connection
+ holds. Omitted if the connection does not hold any locks.
+ </column>
+
+ <column name="status" key="locks_waiting">
+ Space-separated list of the names of OVSDB locks that the connection is
+ currently waiting to acquire. Omitted if the connection is not waiting
+ for any locks.
+ </column>
+
+ <column name="status" key="locks_lost">
+ Space-separated list of the names of OVSDB locks that the connection
+ has had stolen by another OVSDB client. Omitted if no locks have been
+ stolen from this connection.
+ </column>
+
+ <column name="status" key="n_connections"
+ type='{"type": "integer", "minInteger": 2}'>
+ <p>
+ When <ref column="target"/> specifies a connection method that
+ listens for inbound connections (e.g. <code>ptcp:</code> or
+ <code>pssl:</code>) and more than one connection is actually active,
+ the value is the number of active connections. Otherwise, this
+ key-value pair is omitted.
+ </p>
+ <p>
+ When multiple connections are active, status columns and key-value
+ pairs (other than this one) report the status of one arbitrarily
+ chosen connection.
+ </p>
+ </column>
+ </group>
+
+ <group title="Connection Parameters">
+ <p>
+ Additional configuration for a connection between the manager
+ and the Open vSwitch Database.
+ </p>
+
+ <column name="other_config" key="dscp"
+ type='{"type": "integer"}'>
+ The Differentiated Service Code Point (DSCP) is specified using 6 bits
+ in the Type of Service (TOS) field in the IP header. DSCP provides a
+ mechanism to classify the network traffic and provide Quality of
+ Service (QoS) on IP networks.
+
+ The DSCP value specified here is used when establishing the connection
+ between the manager and the Open vSwitch. If no value is specified, a
+ default value of 48 is chosen. Valid DSCP values must be in the range
+ 0 to 63.
</column>
</group>
+
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="external_ids"/>
+ <column name="other_config"/>
+ </group>
</table>
<table name="NetFlow">
<column name="add_id_to_interface">
<p>If this column's value is <code>false</code>, the ingress and egress
- interface fields of NetFlow flow records are derived from OpenFlow port
- numbers. When it is <code>true</code>, the 7 most significant bits of
- these fields will be replaced by the least significant 7 bits of the
- engine id. This is useful because many NetFlow collectors do not
- expect multiple switches to be sending messages from the same host, so
- they do not store the engine information which could be used to
- disambiguate the traffic.</p>
+ interface fields of NetFlow flow records are derived from OpenFlow port
+ numbers. When it is <code>true</code>, the 7 most significant bits of
+ these fields will be replaced by the least significant 7 bits of the
+ engine id. This is useful because many NetFlow collectors do not
+ expect multiple switches to be sending messages from the same host, so
+ they do not store the engine information which could be used to
+ disambiguate the traffic.</p>
<p>When this option is enabled, a maximum of 508 ports are supported.</p>
</column>
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate with Open
- vSwitch, rather than by Open vSwitch itself. System integrators should
- either use the Open vSwitch development mailing list to coordinate on
- common key-value definitions, or choose key names that are likely to be
- unique. No common key-value pairs are currently defined.
- </column>
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="external_ids"/>
+ </group>
</table>
<table name="SSL">
it will immediately drop the connection and reconnect, and from then
on all SSL connections must be authenticated by a certificate signed
by the CA certificate thus obtained. <em>This option exposes the
- SSL connection to a man-in-the-middle attack obtaining the initial
- CA certificate.</em> It may still be useful for bootstrapping.
+ SSL connection to a man-in-the-middle attack obtaining the initial
+ CA certificate.</em> It may still be useful for bootstrapping.
</column>
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate with Open
- vSwitch, rather than by Open vSwitch itself. System integrators should
- either use the Open vSwitch development mailing list to coordinate on
- common key-value definitions, or choose key names that are likely to be
- unique. No common key-value pairs are currently defined.
- </column>
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
+
+ <column name="external_ids"/>
+ </group>
</table>
<table name="sFlow">
<p>An sFlow(R) target. sFlow is a protocol for remote monitoring
- of switches.</p>
+ of switches.</p>
<column name="agent">
Name of the network device whose IP address should be reported as the
- ``agent address'' to collectors. If not specified, the IP address
+ ``agent address'' to collectors. If not specified, the agent device is
+ figured from the first target address and the routing table. If the
+ routing table does not contain a route to the target, the IP address
defaults to the <ref table="Controller" column="local_ip"/> in the
collector's <ref table="Controller"/>. If an agent IP address cannot be
- determined either way, sFlow is disabled.
+ determined any of these ways, sFlow is disabled.
</column>
<column name="header">
<code><var>ip</var>:<var>port</var></code>.
</column>
- <column name="external_ids">
- Key-value pairs for use by external frameworks that integrate with Open
- vSwitch, rather than by Open vSwitch itself. System integrators should
- either use the Open vSwitch development mailing list to coordinate on
- common key-value definitions, or choose key names that are likely to be
- unique. No common key-value pairs are currently defined.
- </column>
- </table>
-
- <table name="Capability">
- <p>Records in this table describe functionality supported by the hardware
- and software platform on which this Open vSwitch is based. Clients
- should not modify this table.</p>
-
- <p>A record in this table is meaningful only if it is referenced by the
- <ref table="Open_vSwitch" column="capabilities"/> column in the
- <ref table="Open_vSwitch"/> table. The key used to reference it, called
- the record's ``category,'' determines the meanings of the
- <ref column="details"/> column. The following general forms of
- categories are currently defined:</p>
-
- <dl>
- <dt><code>qos-<var>type</var></code></dt>
- <dd><var>type</var> is supported as the value for
- <ref column="type" table="QoS"/> in the <ref table="QoS"/> table.
- </dd>
- </dl>
-
- <column name="details">
- <p>Key-value pairs that describe capabilities. The meaning of the pairs
- depends on the category key that the <ref table="Open_vSwitch"
- column="capabilities"/> column in the <ref table="Open_vSwitch"/> table
- uses to reference this record, as described above.</p>
+ <group title="Common Columns">
+ The overall purpose of these columns is described under <code>Common
+ Columns</code> at the beginning of this document.
- <p>The presence of a record for category <code>qos-<var>type</var></code>
- indicates that the switch supports <var>type</var> as the value of
- the <ref table="QoS" column="type"/> column in the <ref table="QoS"/>
- table. The following key-value pairs are defined to further describe
- QoS capabilities:</p>
-
- <dl>
- <dt><code>n-queues</code></dt>
- <dd>Number of supported queues, as a positive integer. Keys in the
- <ref table="QoS" column="queues"/> column for <ref table="QoS"/>
- records whose <ref table="QoS" column="type"/> value
- equals <var>type</var> must range between 0 and this value minus one,
- inclusive.</dd>
- </dl>
- </column>
+ <column name="external_ids"/>
+ </group>
</table>
+
</database>
projects / openvswitch / blobdiff