Re: hw tcp v4 csum failed on 2.4.23-rc2 with e100

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Hi, Rask

The counter of bad TCP segments in netstat -s is growing.
It happens with almost every site I access, e.g. www.ora.com.
Heavier sites generate more bad segments.

Thanks.

Felix.


Rask Ingemann Lambertsen wrote:


On Sun, Nov 23, 2003 at 09:12:23PM +0200, Felix Radensky wrote:


Hi, Rask

Rask Ingemann Lambertsen wrote:



It could be neither. It just means that the checksum in the packet was in
disagreement (for lack of better word) with the checksum calculated by the
hardware. If I read the tcp_ipv4 code right, then all it takes for that
message to be printed is a packet with an incorrect checksum to be received
by a device which supports hardware checksum calculation.


[cut]


It's a plain IP over Ethernet, WWW traffic.



Are you receiving data from a WWW server? If so, what is the URL? I should be getting the same error when receiving from it since I use an i82559 for my Internet connection.



What does "netstat -s | grep -F -e 'bad segments received'" give (with and
without hardware checksumming)?



I get nonzero value with and without hardware checksumming.



What I should have asked for, is: Do they increase?


I think the problem here is with the sender of those packets, not with your
box.




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