[dpdk-dev] [PATCH v2 2/2] net/virtio: support GUEST ANNOUNCE

Wang, Xiao W xiao.w.wang at intel.com
Wed Jan 3 09:42:29 CET 2018



> -----Original Message-----
> From: Wang, Xiao W
> Sent: Wednesday, January 3, 2018 9:37 AM
> To: Bie, Tiwei <tiwei.bie at intel.com>
> Cc: yliu at fridaylinux.org; dev at dpdk.org; stephen at networkplumber.org
> Subject: RE: [PATCH v2 2/2] net/virtio: support GUEST ANNOUNCE
> 
> Hi,
> 
> > -----Original Message-----
> > From: Bie, Tiwei
> > Sent: Monday, December 4, 2017 4:47 PM
> > To: Wang, Xiao W <xiao.w.wang at intel.com>
> > Cc: yliu at fridaylinux.org; dev at dpdk.org; stephen at networkplumber.org
> > Subject: Re: [PATCH v2 2/2] net/virtio: support GUEST ANNOUNCE
> >
> > On Mon, Dec 04, 2017 at 06:02:08AM -0800, Xiao Wang wrote:
> > > When live migration is done, for the backup VM, either the virtio
> > > frontend or the vhost backend needs to send out gratuitous RARP packet
> > > to announce its new network location.
> > >
> >
> > To support GUEST ANNOUNCE, do we just need to send a RARP packet?
> > Will it work in an IPv6-only network?
> 
> Will try to send out another one for IPv6 in next version.

Checking kernel's implementation on IPv6, it's associated with netdev configuration, in DPDK there's no such concept.

BRs,
Xiao


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