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Re: Ethernet bridge performance

To: Ben Greear <greearb@xxxxxxxxxxxxxxx>
Subject: Re: Ethernet bridge performance
From: Andi Kleen <ak@xxxxxxx>
Date: Sun, 10 Aug 2003 21:47:23 +0200
Cc: Felix Radensky <felix@xxxxxxxxx>, Robert Olsson <Robert.Olsson@xxxxxxxxxxx>, netdev@xxxxxxxxxxx, "Feldman, Scott" <scott.feldman@xxxxxxxxx>
In-reply-to: <3F368B3A.3070009@candelatech.com>
References: <3F3217E7.2080903@allot.com> <3F3284EA.5050406@candelatech.com> <3F328A0F.3040005@allot.com> <16178.41976.3643.584516@robur.slu.se> <3F3601F3.6000001@allot.com> <3F368B3A.3070009@candelatech.com>
Sender: netdev-bounce@xxxxxxxxxxx
> >Speaking of checksumming. This can be a problem indeed. ethtool -S shows 
> >a lot
> >of rx_csum_offload errors. Scott, what could possibly be a problem ? The 
> >NIC
> >is dual port 82546, driver is 5.1.13-k1.
> 
> Why would a bridge be checksumming anything?

A NIC normally checksums every incoming packet when hardware checksumming
is enabled.  But of course the bridge doesn't use that information.

-Andi

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