netdev - Re: vrf and multicast problem

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Date:   Wed, 9 Mar 2022 20:54:31 -0700
From:   David Ahern <dsahern@...il.com>
To:     Ben Greear <greearb@...delatech.com>,
        netdev <netdev@...r.kernel.org>
Subject: Re: vrf and multicast problem

On 3/9/22 3:31 PM, Ben Greear wrote:
> [resend, sorry...sent to wrong mailing list the first time]
> 
> Hello,
> 
> We recently found a somewhat weird problem, and before I go digging into
> the kernel source, I wanted to see if someone had an answer already...
> 
> I am binding (SO_BINDTODEVICE) a socket to an Ethernet port that is in a
> VRF with a second
> interface.  When I try to send mcast traffic out that eth port, nothing is
> seen on the wire.
> 
> But, if I set up a similar situation with a single network port in
> a vrf and send multicast, then it does appear to work as I expected.
> 
> I am not actually trying to do any mcast routing here, I simply want to
> send
> out mcast frames from a port that resides inside a vrf.
> 
> Any idea what might be the issue?
> 

multicast with VRF works. I am not aware of any known issues