Re: hw tcp v4 csum failed

From: David S. Miller (davem@redhat.com)
Date: Sun Jul 27 2003 - 17:26:20 EST


On Sun, 27 Jul 2003 10:02:46 +0300
Doruk Fisek <dfisek@fisek.com.tr> wrote:

> Hi,
>
> I am getting "hw tcp v4 csum failed" errors using a BCM5701 ethernet
> adapter with the tigon3 driver in a vanilla 2.4.20 kernel.
>
> There seems to be no apparent problem (probably because of low-load).
>
> What can be the cause of these errors?

Nothing need to be done.

They are usually happening because of one of two things:

1) The other host computed an incorrect checksum.
2) Something between the foreign host and your's corrupted
   the packet.

Both of which are normal events and so you can ignore the
message safely.
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