netdev - Re: VRF leaking doesn't work

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Message-ID: <5b2595ed-bf5b-2775-405c-bb5031fd2095@gmail.com>
Date:   Sat, 6 Mar 2021 09:12:15 -0700
From:   David Ahern <dsahern@...il.com>
To:     Greesha Mikhalkin <grigoriymikhalkin@...il.com>,
        netdev@...r.kernel.org
Subject: Re: VRF leaking doesn't work

On 3/2/21 3:57 AM, Greesha Mikhalkin wrote:
> Main goal is that 100.255.254.3 should be reachable from vrf2. But
> after this setup it doesn’t work. When i run `ping -I vrf2
> 100.255.254.3` it sends packets from source address that belongs to
> vlan1 enslaved by vrf1. I can see in tcpdump that ICMP packets are
> sent and then returned to source address but they're not returned to
> ping command for some reason. To be clear `ping -I vrf1 …` works fine.

I remember this case now: VRF route leaking works for fowarding, but not
local traffic. If a packet arrives in vrf2, it should get forwarded to
vrf1 and on to its destination. If the reverse route exists then round
trip traffic works.