[Beowulf] tcp error: Need ideas!

Scott Atchley atchley at myri.com
Sun Jan 25 07:35:48 PST 2009

On Jan 25, 2009, at 10:13 AM, Gerry Creager wrote:

> -bash-3.2# ethtool -K rx off
> no offload settings changed

You missed the interface here. You should try:

-bash-3.2# ethtool -K eth1 rx off

> -bash-3.2# ethtool -k eth1
> Offload parameters for eth1:
> rx-checksumming: on
> tx-checksumming: on
> scatter-gather: on
> tcp segmentation offload: on
> udp fragmentation offload: off
> generic segmentation offload: off
> But here's the one I love:
> -bash-3.2# ethtool -K tso off
> no offload settings changed

Again, you are missing the interface:

-bash-3.2# ethtool -K eth1 tso off

> I apparently can't control things with ethtool...

Ethtool provides -S to let the driver report additional information.  
Does this report anything:

# ethtool -S eth1


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