Re: [linux-vrf-core] One interface with multiple vrfs

[James R. L. <jl...@mi...>]

Hello,

This is not a case I had thought about when implementing, so help me
understand the motivation:

Why would you want an interface to be in multiple VRFs?
How would you want incoming packets on said interface to be routed?

Currently, there is a many-to-one relationship (multiple interfaces can
be added to a VRF, but only one VRF per interface).  This is so that
IP packets coming in an interface only need to be looked up in one routing
table. If there were multiple VRFs associated with an interface what
routing table would incoming packets be routed according to?

If you have a userland application that needs to transmit IP packets
'in' different VRFs then that application should either use the 'chvrf'
utility to set the VRF associated with a process, or use the VRF socket
option to set the VRF associated with a socket.

On Wed, Sep 20, 2006 at 01:49:14PM +0200, mat...@ne... wr=
ote:
> First I tried to add multiple vrf to one interface. But it doesn't run.=
=20
> Then I tried to add multiple vrf to a vlan, but I get the message: no suc=
h=20
> device.
>=20
> Is it possible to run one interface in multiple vrfs?=20
>=20
>=20
> Regards,
>=20
> Matthias Flittner=20

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--=20
James R. Leu
jl...@mi...