[K12OSN] iptraf - ip checksum errors?

[Michael C Wescott]

On Wed, 2005-10-05 at 11:44 -0700, Robert Arkiletian wrote:
> Having recently discovered iptraf I  found "ip checksum errors" being
> generated at around 1000/sec when a full class is using the lab.
> 
> Any idea how to track down this problem? Is there any way to find out
> which clients are reporting bad packets?

My first inclination would be to use ethereal to collect a few seconds
of traffic and then scan it for checksum errors. The IP address or
ethernet address would then identify the offending machine. If there are
alot of culprits then the server's NIC or the switch might be at fault.