[Bug 785668] Re: bonding inside a bridge does not update ARP correctly when bridged net accessed from within a VM

[Serge Hallyn]

Thanks for reporting this bug and the detailed reproduction
instructions.  I would mark it high, but since you offer a workaround
I'll mark it medium instead.

What does your /etc/modprobe.d/bonding show?

I've not used this combination myself, but from those who have, a few
things do appear fragile, namely:

1. if you are using 802.3ad, you need trunking enabled on the physical
switch

2. some people find that turning stp on helps
(http://www.linuxquestions.org/questions/linux-
networking-3/bridging-a-bond-802-3ad-only-works-when-stp-is-
enabled-741640/)

But I'm actually wondering whether this patch:

http://permalink.gmane.org/gmane.linux.network/159403

may be needed.  If so, then even the natty kernel does not yet have that
fix.

I am marking this as affecting the kernel, since I believe that is where
the bug lies.

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https://bugs.launchpad.net/bugs/785668

Title:
  bonding inside a bridge does not update ARP correctly when bridged net
  accessed from within a VM