Bug#666386: igb + bnx2 + ifenslave + brctl + vconfig = largely broken

[Josip Rodin <joy@debbugs.entuzijast.net>]

On Mon, Apr 02, 2012 at 05:22:37AM +0100, Ben Hutchings wrote:
> On Sun, 2012-04-01 at 12:40 +0200, Josip Rodin wrote:
> > On Sun, Apr 01, 2012 at 03:09:56AM +0100, Ben Hutchings wrote:
> > > I bet this is due to the combination of LRO plus bridging.  We try to
> > > turn off LRO in devices under a bridge, but that won't work if there's
> > > an intermediate bonding device.
> > > 
> > > If you run:
> > > 
> > > # ethtool -K eth0 lro off
> > > # ethtool -K eth2 lro off
> > > 
> > > does the bridge start working?
> > 
> > Err...
> > 
> > % sudo ethtool -K eth0 lro off
> > Cannot set large receive offload settings: Operation not supported
> > % sudo ethtool -K eth2 lro off
> > Cannot set large receive offload settings: Operation not supported
> 
> Hmm.  Well it shouldn't be a problem but you could try also turning off
> GRO (similar commands).

Ah, there we go. Once I ran sudo ethtool -K eth0 gro off,
sudo ifenslave bond54 eth0 produced a still-working bond54.

> > That's with eth0 removed from bonding, and eth2 inside.
> 
> So the bonding device has only one slave now?

Yes, it was like that.

> What if you take the bonding device out completely and add eth2 directly
> to the bridge?

I think I had already tested that and everything was fine, too.
Do you want me to test that or is the GRO removal conclusive?

-- 
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