[Beowulf] ssh connection problem

Greg Lindahl lindahl at pbm.com
Tue May 29 12:16:18 PDT 2007

On Sun, May 27, 2007 at 12:17:54PM +0330, Ruhollah Moussavi Baygi  wrote:

> 'Disconnecting: Corrupted MAC on input'
> 'Disconnecting: bad packet

Well, as the links you posted said, you need to:

1) Make sure everyone has the latest version of ssh installed, and
2) Figure out if there is a bad ethernet NIC somewhere

ssh works over tcp, so, if there is corrupted data being sent, it is
probably because the NIC on your front-end is bad. This is a pretty
rare problem, normally a bad component (e.g. a bad cable) causes the
IP checksum to be bad, and the packets are discarded.

You can look on the front-end at the output of "netstat -i" and
"netstat -s" to see if lots of bad checksums are being caused, too.

-- greg

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