7 - The tunneling code no longer assumes input and output keys are symmetric.
8 If they are not, PMTUD needs to be disabled for tunneling to work. Note
9 this only applies to flow-based keys.
10 - FreeBSD is now a supported platform, thanks to code contributions from
11 Gaetano Catalli, Ed Maste, and Giuseppe Lettieri.
12 - ovs-bugtool: New --ovs option to report only OVS related information.
13 - New %t and %T log escapes to identify the subprogram within a
14 cooperating group of processes or threads that emitted a log message.
15 The default log patterns now include this information.
17 - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL
18 fields in IPv6 neighbor discovery messages, and IPv6 flow label.
19 - Adds support for writing to the metadata field for a flow.
20 - It is possible to request the OpenFlow port number with the
21 "ofport_request" column in the Interface table.
23 - Commands and actions that accept port numbers now also accept keywords
24 that represent those ports (such as LOCAL, NONE, and ALL). This is
25 also the recommended way to specify these ports, for compatibility
26 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
27 for these ports for different purposes).
29 - Support requesting the port number with the "port_no" option in
31 - The "dump-flows" and "del-flows" no longer require an argument
32 if only one datapath exists.
34 - New "dpif/dump-dps", "dpif/show", and "dpif/dump-flows" command
35 that mimic the equivalent ovs-dpctl commands.
36 - ovs-pki: The "online PKI" features have been removed, along with
37 the ovs-pki-cgi program that facilitated it, because of some
38 alarmist insecurity claims. We do not believe that these claims
39 are true, but because we do not know of any users for this
40 feature it seems better on balance to remove it. (The ovs-pki-cgi
41 program was not included in distribution packaging.)
42 - Tunnel Path MTU Discovery default value was set to 'disabled'. This
43 feature is deprecated and will be removed soon.
44 - ovsdb-server now enforces the immutability of immutable columns. This
45 was not enforced in earlier versions due to an oversight.
46 - New support for a nonstandard form of GRE that supports a 64-bit key.
47 - The ofproto library is now responsible for assigning OpenFlow port
48 numbers. An ofproto implementation should assign them when
49 port_construct() is called.
50 - The following features are now deprecated. They will be removed no
51 earlier than February 2013. Please email dev@openvswitch.org with
54 - The autopath action.
55 - Interface type "null".
56 - Numeric values for reserved ports (see "ovs-ofctl" note above).
57 - Tunnel Path MTU Discovery.
61 ------------------------
62 - New FAQ. Please send updates and additions!
63 - Authors of controllers, please read the new section titled "Action
64 Reproduction" in DESIGN, which describes an Open vSwitch change in
65 behavior in corner cases that may affect some controllers.
67 - A new test utility that can create L3 tunnel between two Open
68 vSwitches and detect connectivity issues.
70 - New --sort and --rsort options for "dump-flows" command.
71 - "mod-port" command can now control all OpenFlow config flags.
73 - Allow general bitwise masking for IPv4 and IPv6 addresses in
74 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
76 - Allow support for arbitrary Ethernet masks. (Previously, only
77 the multicast bit in the destination address could be individually
79 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
80 - The OFPST_QUEUE request now reports an error if a specified port or
81 queue does not exist, or for requests for a specific queue on all
82 ports, if the specified queue does not exist on any port. (Previous
83 versions generally reported an empty set of results.)
84 - New "flow monitor" feature to allow controllers to be notified of
85 flow table changes as they happen.
86 - Additional protocols are not mirrored and dropped when forward-bpdu is
87 false. For a full list, see the ovs-vswitchd.conf.db man page.
88 - Open vSwitch now sends RARP packets in situations where it previously
89 sent a custom protocol, making it consistent with behavior of QEMU and
91 - All Open vSwitch programs and log files now show timestamps in UTC,
92 instead the local timezone, by default.
96 ------------------------
97 - kernel modules are renamed. openvswitch_mod.ko is now
98 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
99 - Increased the number of NXM registers to 8.
100 - Added ability to configure DSCP setting for manager and controller
101 connections. By default, these connections have a DSCP value of
102 Internetwork Control (0xc0).
103 - Added the granular link health statistics, 'cfm_health', to an
106 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
107 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
110 - Added the "dump-ports-desc" command to retrieve port
111 information using the new port description multipart messages.
113 - Added support for spawning ovs-test server from the client.
114 - Now ovs-test is able to automatically create test bridges and ports.
115 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
116 - Tripled flow setup performance.
117 - The "coverage/log" command previously available through ovs-appctl
118 has been replaced by "coverage/show". The new command replies with
119 coverage counter values, instead of logging them.
123 ------------------------
124 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
128 ------------------------
129 *** Internal only release ***
131 - LACP bonds no longer fall back to balance-slb when negotiations fail.
132 Instead they drop traffic.
133 - The default bond_mode changed from SLB to active-backup, to protect
134 unsuspecting users from the significant risks of SLB bonds (which are
135 documented in vswitchd/INTERNALS).
136 - Load balancing can be disabled by setting the bond-rebalance-interval
139 - Added support for bitwise matching on TCP and UDP ports.
140 See ovs-ofctl(8) for more information.
141 - NXM flow dumps now include times elapsed toward idle and hard
143 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
144 controllers more precise control over which OpenFlow messages they
145 receive asynchronously.
146 - New "fin_timeout" action.
147 - Added "fin_timeout" support to "learn" action.
148 - New Nicira action NXAST_CONTROLLER that offers additional features
149 over output to OFPP_CONTROLLER.
150 - When QoS settings for an interface do not configure a default queue
151 (queue 0), Open vSwitch now uses a default configuration for that
152 queue, instead of dropping all packets as in previous versions.
154 - Logging to console and file will have UTC timestamp as a default for
155 all the daemons. An example of the default format is
156 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
158 - The syntax of commands and options to set log levels was simplified,
159 to make it easier to remember.
160 - New support for limiting the number of flows in an OpenFlow flow
161 table, with configurable policy for evicting flows upon
162 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
163 for more information.
164 - New "enable-async-messages" column in the Controller table. If set to
165 false, OpenFlow connections to the controller will initially have all
166 asynchronous messages disabled, overriding normal OpenFlow behavior.
167 - ofproto-provider interface:
168 - "struct rule" has a new member "used" that ofproto implementations
169 should maintain by updating with ofproto_rule_update_used().
171 - The new option --timestamp causes the "monitor" command to print
172 a timestamp with every update.
173 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
177 ------------------------
179 - Added support for querying, modifying, and deleting flows
180 based on flow cookie when using NXM.
181 - Added new NXM_PACKET_IN format.
182 - Added new NXAST_DEC_TTL action.
184 - Added daemonization support to the monitor and snoop commands.
186 - The "find" command supports new set relational operators
187 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
188 - ovsdb-tool now uses the typical database and schema installation
189 directories as defaults.
190 - The default MAC learning timeout has been increased from 60 seconds
191 to 300 seconds. The MAC learning timeout is now configurable.
195 ------------------------
196 - Compatible with Open vSwitch kernel module included in Linux 3.3.
197 - New "VLAN splinters" feature to work around buggy device drivers
198 in old Linux versions. (This feature is deprecated. When
199 broken device drivers are no longer in widespread use, we will
200 delete this feature.) See ovs-vswitchd.conf.db(5) for more
203 - Added ability to match on IPv6 flow label through NXM.
204 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
205 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
206 - Added ability to modify ECN bits in IPv4.
207 - Added ability to modify TTL in IPv4.
209 - Don't require the "normal" action to use mirrors. Traffic will
210 now be properly mirrored for any flows, regardless of their
212 - Track packet and byte statistics sent on mirrors.
213 - The sFlow implementation can now usually infer the correct agent
214 device instead of having to be told explicitly.
216 - New "fdb/flush" command to flush bridge's MAC learning table.
218 - A new distributed testing tool that allows one to diagnose performance
219 and connectivity issues. This tool currently is not included in RH or
221 - RHEL packaging now supports integration with Red Hat network scripts.
223 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
224 to active-backup. SLB bonds carry significant risks with them
225 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
226 users from running into. Users are advised to update any scripts or
227 configuration which may be negatively impacted by explicitly setting
228 the bond mode which they want to use.
232 ------------------------
234 - Added an OpenFlow extension which allows the "output" action to accept
236 - Added an OpenFlow extension for flexible learning.
237 - Bumped number of NXM registers from four to five.
239 - New "version" command to determine version of running daemon.
240 - If no argument is provided for "cfm/show", displays detailed
241 information about all interfaces with CFM enabled.
242 - If no argument is provided for "lacp/show", displays detailed
243 information about all ports with LACP enabled.
245 - New "set-if" command to modify a datapath port's configuration.
247 - The software switch now supports 255 OpenFlow tables, instead
248 of just one. By default, only table 0 is consulted, but the
249 new NXAST_RESUBMIT_TABLE action can look up in additional
250 tables. Tables 128 and above are reserved for use by the
251 switch itself; please use only tables 0 through 127.
252 - Add support for 802.1D spanning tree (STP).
253 - Fragment handling extensions:
254 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
255 fields are made available for matching in fragments with
257 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
258 via "ip_frag" in ovs-ofctl).
259 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
260 fragment handling policy.
261 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
262 By default it remains compatible with the old version and other
263 standards-based implementations.
264 - Flow setups are now processed in a round-robin manner across ports
265 to prevent any single client from monopolizing the CPU and conducting
266 a denial of service attack.
267 - Added support for native VLAN tagging. A new "vlan_mode"
268 parameter can be set for "port". Possible values: "access",
269 "trunk", "native-tagged" and "native-untagged".
270 - test-openflowd has been removed. Please use ovs-vswitchd instead.
273 ------------------------
274 - New "ofproto" abstraction layer to ease porting to hardware
276 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
277 - Datapath support for Linux kernels up to 3.0.
279 - New "bundle" and "bundle_load" action extensions.
281 - Implement table unique constraints.
282 - Support cooperative locking between callers.
284 - New "-s" option for "show" command prints packet and byte
285 counters for each port.
287 - New "--readd" option for "replace-flows".
289 - New "show" command to print an overview of configuration.
290 - New "comment" command to add remark that explains intentions.
291 - ovs-brcompatd has been rewritten to fix long-standing bugs.
292 - ovs-openflowd has been renamed test-openflowd and moved into the
293 tests directory. Its presence confused too many users. Please
294 use ovs-vswitchd instead.
295 - New ovs-benchmark utility to test flow setup performance.
296 - A new log level "off" has been added. Configuring a log facility
297 "off" prevents any messages from being logged to it. Previously,
298 "emer" was effectively "off" because no messages were ever logged at
299 level "emer". Now, errors that cause a process to exit are logged
301 - "configure" option --with-l26 has been renamed --with-linux, and
302 --with-l26-source has been renamed --with-linux-source. The old
303 names will be removed after the next release, so please update
305 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
306 datapath/linux-2.6/compat-2.6 directories.
308 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
309 Please use the extensible match extensions instead.
310 - Removed the Maintenance_Point and Monitor tables in an effort
311 to simplify 802.1ag configuration.
312 - Performance and scalability improvements
316 ------------------------
317 - Ability to define policies over IPv6
320 - Support for extensible match extensions to OpenFlow
322 - Support for HFSC qdisc.
323 - Queue used by in-band control can now be configured.
325 - Kernel<->userspace interface has been reworked and should be
326 close to a stable ABI now.
327 - "Port group" concept has been dropped.
328 - GRE over IPSEC tunnels
330 - New active backup bonding mode.
331 - New L4 hashing support when LACP is enabled.
332 - Source MAC hash now includes VLAN field also.
334 - Greatly improved handling of large flow tables
336 - "show" command now prints full vport configuration.
337 - "dump-groups" command removed since kernel support for
338 port groups was dropped.
340 - New commands for working with the new Managers table.
341 - "list" command enhanced with new formatting options and --columns
343 - "get" command now accepts new --id option.
344 - New "find" command.
346 - New "queue-stats" command for printing queue stats.
347 - New commands "replace-flows" and "diff-flows".
348 - Commands to add and remove flows can now read from files.
349 - New --flow-format option to enable or disable NXM.
350 - New --more option to increase OpenFlow message verbosity.
351 - Removed "tun-cookie" command, which is no longer useful.
352 - ovs-controller enhancements for testing various features.
353 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
354 bugs. New ovs-vlan-bug-workaround command for enabling and
355 disabling a workaround for these driver bugs.
357 - "Resubmit" actions now update flow statistics.
358 - New "register" extension for use in matching and actions, via NXM.
359 - New "multipath" experimental action extension.
360 - New support for matching multicast Ethernet frames, via NXM.
361 - New extension for OpenFlow vendor error codes.
362 - New extension to set the QoS output queue without actually
363 sending to an output port.
364 - Open vSwitch now reports a single flow table, instead of
365 separate hash and wildcard tables. This better models the
366 current implementation.
367 - New experimental "note" action.
368 - New "ofproto/trace" ovs-appctl command and associated utilities
369 to ease debugging complex flow tables.
371 - Schema documentation now includes an entity-relationship diagram.
372 - The database is now garbage collected. In most tables,
373 unreferenced rows will be deleted automatically.
374 - Many tables now include statistics updated periodically by
375 ovs-vswitchd or ovsdb-server.
376 - Every table now has an "external-ids" column for use by OVS
378 - There is no default controller anymore. Each bridge must have its
379 controller individually specified.
380 - The "fail-mode" is now a property of a Bridge instead of a Controller.
381 - New versioning and checksum features.
382 - New Managers table and manager_options column in Open_vSwitch table
383 for specifying managers. The old "managers" column in the
384 Open_vSwitch table has been removed.
385 - Many "name" columns are now immutable.
387 - Dropped support for XenServer pre-5.6.100.
388 - Dropped support for Linux pre-2.6.18.
389 - Dropped controller discovery support.
390 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
391 Statistics reporting in the database is a rough equivalent.
392 - Dropped the "corekeeper" package (now separate, at
393 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
394 - Performance and scalability improvements
397 v1.1.0pre2 - 13 Sep 2010
398 ------------------------
401 v1.1.0pre1 - 31 Aug 2010
402 ------------------------
403 - OpenFlow 1.0 slicing (QoS) functionality
404 - Python bindings for configuration database (no write support)
405 - Performance and scalability improvements
410 - New "patch" interface type
415 - Configuration database with remote management
418 - Support for XenServer 5.5 and 5.6
419 - Performance and scalability improvements
422 v0.99.2 - 18 Feb 2010
423 ---------------------
426 v0.99.1 - 25 Jan 2010
427 ---------------------
428 - Add support for sFlow(R)
429 - Make headers compatible with C++
432 v0.99.0 - 14 Jan 2010
433 ---------------------
434 - User-space forwarding engine
437 v0.90.7 - 29 Nov 2009
438 ---------------------
439 - Add support for NetFlow active timeouts
446 v0.90.5 - 21 Sep 2009
447 ---------------------
448 - Generalize in-band control to more diverse network setups
projects / openvswitch / blob