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Subjecte1000, sshd, and the infamous "Corrupted MAC on input"
Hey all,

I've been having quite a time with the e1000 driver running at gigabit
speeds. Running it at 100Fdx has never been a problem, which I've done
done for a long time. Last week I picked up a gigabit switch, and that's
when the trouble began. I find that transferring large amounts of data
using scp invariably ends up with sshd spitting out "Disconnecting:
Corrupted MAC on input." After deciding I must have purchased a bum
switch, I grabbed another model.. only to get the same error.
Finally, I used a crossover cable between the two boxes, which resulted
in the same error from sshd again.

Both systems are 2.6.10, with 4k stacks, and regparm enabled. system 1
has an onboard Intel 82547EI, system 2 has an onboard Intel 82545EM,
both have NAPI enabled... Oddly, running the nics at 100Fdx does not
generate this error no matter how much pressure I put on them. I've
found a lot of scuttlebutt regarding these problems with sshd on the
net, but this appears a hardware/driver problem. There's mention of a
specific problem with e1000 here:
http://www.psc.edu/networking/projects/hpn-ssh but no apparent resolution.

Any suggestions are greatly appreciated.

-E
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