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Message-ID: <C20D94CC.3237%Keir.Fraser@cl.cam.ac.uk>
Date:	Fri, 02 Mar 2007 08:46:04 +0000
From:	Keir Fraser <Keir.Fraser@...cam.ac.uk>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	<xen-devel@...ts.xensource.com>, Jeff Garzik <jeff@...zik.org>,
	Ian Pratt <ian.pratt@...source.com>, <netdev@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Chris Wright <chrisw@...s-sol.org>,
	Andi Kleen <ak@....de>, <Zachary@...p.osdl.org>,
	<virtualization@...ts.osdl.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC] Arp announce (for Xen)

On 2/3/07 01:30, "Stephen Hemminger" <shemminger@...ux-foundation.org>
wrote:

> What about implementing the unused arp_announce flag on the inetdevice?
> Something like the following.  Totally untested...
> 
> Looks like it either was there (and got removed) or was planned but
> never implemented.

This would be acceptable. It only needs a simple script to poke the correct
value, and that could be easily integrated into vendor scripts. The general
idea of being able to have a callback to userspace is okay but we'd like
something lighter weight for live migration, which is typically done only
within the scope of a single layer-2 network and hence all that is really
required is the gratuitous ARP to kick the switch hardware.

 -- Keir


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