<column name="system_version">
<p>
The version of the system identified by <ref column="system_type"/>,
- e.g. <code>5.5.0-24648p</code> on XenServer 5.5.0 build 24648.
+ 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
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="status">