[ovs-dev] exporting port-to-ifindex mapping

Neil Mckee neil.mckee at inmon.com
Fri Jun 7 22:19:28 UTC 2013

Want to make sure I get off on the right foot...  should the read-only ifindex field go
into "Port" or "Interface" ?  It seems like ovsrec_interface is the one with the pointer to netdev.

So I just need to:

1. change the schema to add ifindex as a new field (with mutable: false),
2. update the schema checksum and rebuild vswitch-idl.[ch],  then
3.  edit bridge.c to make sure the ifindex from the netdev is pushed into
ovsrec_interface whenever one of those is created.

Does this sound like a plan?

Is there an existing read-only field that behaves in a similar way so I can nose around?


On May 28, 2013, at 5:01 PM, Ben Pfaff <blp at nicira.com> wrote:

> On Tue, May 28, 2013 at 12:17:39PM -0700, Neil Mckee wrote:
>> It would be helpful if ovs-vsctl(1) had a way to write out the
>> netdev ifIndex numbers, where applicable, of the bridge ports.  This
>> would help to harmonize integration with SNMP, sFlow, LLDP and more.
>> Could it be an extra column in the output from "ovs-vsctl list Port"
>> ?  Or a key-value pair in the "External-IDs" column?
> It would be easy enough to add it to the "status" column,
> e.g. status:ifindex.  It might even be reasonable to add a standalone
> "ifindex" column, since ifindex is a pretty universal concept.  I
> think I lean that way.
> Are you willing and able to propose a patch?

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