netdev - Re: IGMP joins come from the wrong SA/interface

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Message-ID: <20140130141747.GC25336@order.stressinduktion.org>
Date:	Thu, 30 Jan 2014 15:17:47 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	"Steinar H. Gunderson" <sgunderson@...foot.com>
Cc:	netdev@...r.kernel.org
Subject: Re: IGMP joins come from the wrong SA/interface

On Thu, Jan 30, 2014 at 11:47:09AM +0100, Steinar H. Gunderson wrote:
> On Mon, Jan 20, 2014 at 07:40:25PM +0100, Steinar H. Gunderson wrote:
> >> I currently only remember one commit 0a7e22609067ff ("ipv4: fix
> >> ineffective source address selection") which did affect multicast source
> >> address selection in recent times.
> > I tried 3.10.27, just to check something older. I also tried 3.10.27 with
> > 0a7e22609067ff reverted, and it's still wrong.
> > 
> > I am thinking this might have something to do with the machine switching to
> > systemd, presumably changing the order of DHCP and static addresses being
> > assigned...
> 
> Anything more I can do here?

Can you give a bit more background what multicast application you are running
on the box and also post a cat /proc/net/igmp?

(For the application info an strace how the join to the multicast address would be
interesting.)

I guess a workaround would be to bind the join to a specific interface.

Greetings,

  Hannes

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