On 21 Nov 2024, at 21:34, Ian Pilcher wrote:
> Occasionally, when running 'ovs-appctl fdb/show BRIDGE', I am seeing
> the port for some MAC addresses shown as "LOCAL", instead of the
> expected port number.
>
> For example:
>
> # ovs-appctl fdb/show br-ex
> port VLAN MAC Age
> 1 0 ac:1f:6b:61:54:36 95
> 1 0 ac:1f:6b:61:54:da 94
> 1 0 ac:1f:6b:61:55:b4 94
> 1 0 48:5a:0d:31:88:ef 46
> 1 0 ac:1f:6b:61:72:94 27
> 1 0 ac:1f:6b:61:72:fe 25
> 1 0 48:5a:0d:31:15:20 16
> LOCAL 0 ac:1f:6b:6c:44:92 5
> 1 0 48:5a:0d:31:88:20 0
>
> This makes parsing this output (in C) much more difficult, as I can't
> just use sscanf().
>
> Is this expected behavior?
This mac somehow comes from the OFPP_LOCAL port, bridge. Depending on how you
set up your flows/network this could happen.
> (I don't suppose that there's a secret, undocumented, way to get actual
> machine-parseable output from the server?)
Currently, there is no machine-readable output for this command. However, the
infrastructure has been present since commit 4935e8932, so if you need it, you
could go ahead and submit a patch ;).
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