linux-kernel - Re: [patch v4, kernel version 3.2.1] net/ipv4/ip

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Message-ID: <CAEP_g=9H9dV9=qtFPh4YeTNQ-t+UZGw-YqZ6hFWVNXjFy+GCZg@mail.gmail.com>
Date:	Tue, 24 Jan 2012 23:11:06 -0800
From:	Jesse Gross <jesse@...ira.com>
To:	David Miller <davem@...emloft.net>
Cc:	joseph.glanville@...onvm.com.au, steweg@...t.sk,
	eric.dumazet@...il.com, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch v4, kernel version 3.2.1] net/ipv4/ip_gre: Ethernet
 multipoint GRE over IP

On Tue, Jan 24, 2012 at 8:02 PM, David Miller <davem@...emloft.net> wrote:
> From: Joseph Glanville <joseph.glanville@...onvm.com.au>
> Date: Wed, 25 Jan 2012 14:48:37 +1100
>
>> The reason why this patch is useful is that it stands to be the only
>> true mulitpoint L2 VPN with a kernel space forwarding plane.
>
> So what you're telling me is that I added this huge openvswitch
> thing essentially for nothing?

I think it's actually the opposite - Open vSwitch can be used to
implement this type of thing as well as for many other use cases.  On
the other hand, even when implementing a multipoint L2 solution it can
be useful to have additional levels of control but you can't do that
with this patch because it essentially statically glues together
tunneling and bridging.
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