Re: TCP checksum and device driver eri0
From: Martin Paul (martin_at_par.univie.ac.at)
Date: Mon, 30 Jun 2003 10:20:49 +0200 (MEST) To: firstname.lastname@example.org
> During a snoop session on a 280R with solaris 9 and network interface
> eri0, I noticed that the TCP checksum field of every outgoing packet was
> The same packet snooped on the network has the correct checksum value.
> I believe that something happens between the snoop point on the machine
> and the network interface eri0 output.
I guess that's the same effect that's described in the ethereal FAQ at:
It's because the checksum is added to the packet by the network
interface, and not by the TCP/IP stack.
-- Martin Paul | Systems Administrator Institute for Software Science | email@example.com Liechtensteinstrasse 22, A-1090 Wien | Tel: 01 4277 38803 http://www.par.univie.ac.at/ | Fax: 01 4277 9388