Atheros AR821 (Asus P5Q Pro) and 'ale' driver

Pyun YongHyeon pyunyh at gmail.com
Sun Feb 1 20:51:03 PST 2009


On Fri, Jan 23, 2009 at 10:36:34PM +0100, Giuseppe Pagnoni wrote:
> Dear all,
> 
> I am running freebsd 7.1 rel  on an Asus p5q pro motherboard with an
> onboard ethernet chip Atheros AR8121.  I am using the "ale" driver,
> which generally seems to work, although I noticed that when connecting
> via ssh to the machine, I get disconnected with "corrupted MAC on
> input" a little too often.
> 
> Does anybody know if this may be an issue related to the ethernet
> driver, or is it likely to be something totally unrelated?  (I don't
> get the same behavior, though, when the machine is booted in Ubuntu).
> 

AR8121/AR8113/AR8114 are known to have Rx checksum offloading bug
and ale(4) have a workaround for the bug. I'm not sure whether
you're seeing the same bug not handled in the workaround code,
though.

If you disable Rx checksum offloading(e.g. ifconfig ale0 -rxcsum)
does ssh still complain 'corrupted MAC'?

Since you seem to have a way to reproduce the issue, would you show
me the way to trigger the issue?

> thank you very much for any suggestions
> 
> giuseppe


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