Mailinglist Archive: opensuse (1693 mails)

["Greg Freemyer" <greg.freemyer@xxxxxxxxx>]

On 9/29/08, John Andersen <jsamyth@xxxxxxxxx> wrote:
> Kain, Becki (B.) wrote:
>  >
>  >
>  >
>  > These are the settings:
>  >
>  > root@bob1 # ethtool -k eth0
>  > Offload parameters for eth0:
>  > rx-checksumming: on
>  > tx-checksumming: on
>  > scatter-gather: on
>  > tcp segmentation offload: on
>  >
>  > We have this issue where a linux box is talking to anything and throwing
>  > some checksum errors:
>  >
>  > tcp.checksum == 0x4b52 should be 0x2bac
>  >
>  > Ethereal states that it might be "tcp checksum offload?" but we
>  > confirmed that it's on.
>
>  So have you tried with it Offload OFF?
>
>  I've had problems with it in the past, which I ultimately tracked
>  to an application problem, but which only manifested itself when
>  offload was switched on using a gigabit nic.

Agreed the Offload does not always work under Linux.  There was a long
thread on the DRBD list that ended up being caused by a faulty Offload
issue.  I don't recall if it was bug in the firmware, or in the Linux
driver, but either way it was resolved by disabling the offload
(iirc).

Greg
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