How to get the list of bridge interfaces configured in kernel using IPDB functionality.

[rishi narian]

Hi,

     I want to fetch the bridge information associated to the interfaces.

   

     1. How to get the list of bridge interfaces using IPDB functionality?

     2. How to identify the master (root) and slave bridge?

     3. How to get the associated vlans configured for the bridge?

     4. How to  get the information about the veth pairs configured in the kernel.

 >  brctl show command output

Thanks

--Muni

   

[Peter Saveliev]

1. Let's assume we have an IPDB instance as ipdb:

[x.ifname for x in ipdb.by_name.values() if x.kind == 'bridge']

-> ['br0', 'virbr0']

2. Every bridge has an attribute named ports, every port has an attribute named master. NB: it doesn't work for OVS!

3. Every bridge and every port has an attribute named vlans

4. Filter out objects of the kind veth as in 1., and every veth object will have an attribute named link that points to the pair, like that:

[(x.ifname, ipdb.interfaces[x.link].ifname) for x in ipdb.by_name.values() if x.kind == 'veth' and x.link != 0]

->  [('vethX0', 'vethX1'), ('vethY0', 'vethY1')]

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[rishi narian]

Hi Peter,

   Thanks a lot for your help.

   The provided information solves many of issues in my development.

Regards

-R

[Peter Saveliev]

You're welcome :)