linux-kernel - Re: [PATCH] net/bridge: Add 'hairpin' port forwarding mode

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Message-Id: <200908131906.21916.arnd@arndb.de>
Date:	Thu, 13 Aug 2009 19:06:21 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	"Fischer, Anna" <anna.fischer@...com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	Stephen Hemminger <shemminger@...ux-foundation.org>,
	"Paul Congdon (UC Davis)" <ptcongdon@...avis.edu>,
	"evb@...oogroups.com" <evb@...oogroups.com>,
	"bridge@...ts.linux-foundation.org" 
	<bridge@...ts.linux-foundation.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"virtualization@...ts.linux-foundation.org" 
	<virtualization@...ts.linux-foundation.org>,
	"kaber@...sh.net" <kaber@...sh.net>,
	"Dickson, Mike (ISS Software)" <mike.dickson@...com>,
	"adobriyan@...il.com" <adobriyan@...il.com>,
	"bridge@...l.org" <bridge@...l.org>
Subject: Re: [PATCH] net/bridge: Add 'hairpin' port forwarding mode

On Thursday 13 August 2009, Fischer, Anna wrote:
> This patch adds a 'hairpin' (also called 'reflective relay') mode
> port configuration to the Linux Ethernet bridge kernel module.
> A bridge supporting hairpin forwarding mode can send frames back
> out through the port the frame was received on.
> 
> Hairpin mode is required to support basic VEPA (Virtual
> Ethernet Port Aggregator) capabilities.
> 
> You can find additional information on VEPA here:
> http://tech.groups.yahoo.com/group/evb/
> http://www.ieee802.org/1/files/public/docs2009/new-hudson-vepa_seminar-20090514d.pdf
> http://www.internet2.edu/presentations/jt2009jul/20090719-congdon.pdf
> 
> An additional patch 'bridge-utils: Add 'hairpin' port forwarding mode'
> is provided to allow configuring hairpin mode from userspace tools.
> 
> Signed-off-by: Paul Congdon <paul.congdon@...com>
> Signed-off-by: Anna Fischer <anna.fischer@...com>

Acked-by: Arnd Bergmann <arnd@...db.de>
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