From: "David S. Miller" <davem@redhat.com>
To: sp@scali.com
Cc: linux-kernel@vger.kernel.org, beowulf@beowulf.org
Subject: Re: Channel bonding GbE (Tigon3)
Date: Wed, 28 Aug 2002 01:15:09 -0700 (PDT) [thread overview]
Message-ID: <20020828.011509.29049124.davem@redhat.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0208280933250.9999-100000@sp-laptop.isdn.scali.no>
From: Steffen Persvold <sp@scali.com>
Date: Wed, 28 Aug 2002 10:06:19 +0200 (CEST)
> I have an idea that this happens because the packets are comming out of
> order into the receiving node (i.e the bonding device is alternating
> between each interface when sending, and when the receiving node gets the
> packets it is possible that the first interface get packets number 0, 2,
> 4 and 6 in one interrupt and queues it to the network stack before packet
> 1, 3, 5 is handled on the other interface).
That is exactly what is happening. Packets are being reordered.
Welcome to one of the flaws of round-robin trunking. :-)
> If this is the case, any ideas how to fix this...
Don't use round-robin, choose the output device based upon
hashing of some bits in the IP/TCP headers :-)
You won't get 2Gb/sec for a single TCP stream, but you will
for 2 or more.
prev parent reply other threads:[~2002-08-28 8:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-08-27 18:22 Steffen Persvold
2002-08-27 19:27 ` your mail Willy Tarreau
2002-08-28 8:06 ` Channel bonding GbE (Tigon3) Steffen Persvold
2002-08-28 8:15 ` David S. Miller [this message]
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