netdev - Linux L4-Load Balancing with ECMP

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Message-Id: <201104131724.10822.christoph.paasch@uclouvain.be>
Date:	Wed, 13 Apr 2011 17:24:10 +0200
From:	Christoph Paasch <christoph.paasch@...ouvain.be>
To:	netdev@...r.kernel.org
Cc:	Gregory Detal <gregory.detal@...ouvain.be>
Subject: Linux L4-Load Balancing with ECMP

Hi all,

we were trying to do L4-load-balancing with the Linux Kernel (by configuring 
multiple nexthops for the default-route) , and were surprised to see that the 
Linux Kernel load-balances the traffic based only on the IP-addresses and does 
not consider the 5-tuple, when forwarding the traffic.

As L4 load-balancing with ECMP is quite common, I was wondering, if it has 
ever been considered to include this in the Kernel?
Or, what are the reasons that it is not inside?

Thanks,
Christoph Paasch

--
Christoph Paasch
PhD Student

IP Networking Lab --- http://inl.info.ucl.ac.be
MultiPath TCP in the Linux Kernel --- http://inl.info.ucl.ac.be/mptcp
Université Catholique de Louvain

www.rollerbulls.be
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