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Date:      Fri, 11 Oct 2002 02:06:01 -0500 (CDT)
From:      Hyong-Youb Kim <hykim@cs.rice.edu>
To:        <freebsd-net@freebsd.org>
Subject:   Tigon 3 bad checksums on TCP packets
Message-ID:  <Pine.GSO.4.33.0210110157260.6672-100000@frosty.cs.rice.edu>

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I have been recently testing 3C996B-T board in an Athlon system.
The system has TigerMP board and a single Athlon 2000+ and runs FreeBSD
4.7-RC. With bge driver, every thing works fine except that the NIC piles
up bad checksums on TCP receive packets. For instance,
netperf TCP_STREAM from another machine would pile up bad checksums.
What is most amazing to me is that NIC works fine with UDP receive
packets. As far as I have experienced, TCP/UDP checksumming in NIC should
have little or no difference. Too bad that the firmware is under NDA.

I am wondering if any one had this problem. Any help will be greatly
appreciated.


John


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