From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <Ian.Campbell@XenSource.com>
Subject: Re: Gratuitous/unsolicited ARP
Date: Thu, 10 Aug 2006 17:16:15 +0100
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To: Daniel Stodden <stodden@cs.tum.edu>
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On Thu, 2006-08-10 at 18:11 +0200, Daniel Stodden wrote:
> for domain migration, this is an obvious procedure in order to announce
> the relocation of the guest being bridged on a different host.
> 
> i've been grepping around the xen build tree to see whether and where
> this is covered. haven't found anything yet. is this covered by linux
> kernel bridging already, or is it just missing [read: left as a
> scripting exercise to administrators]?

See send_fake_arp() in
linux-2.6-xen-sparse/drivers/xen/netfront/netfront.c

Ian.