Odd ethnetnet problem

Paul Mackerras paulus at cs.anu.edu.au
Fri Aug 6 15:41:18 EST 1999

bob at kunk.jriver.com wrote:

> When the iMac talked to either Unix box from linux-ppc (several kernels
> tested), I would get nearly 100 percent on receive but REALLY slow
> response on transmit (like about 40k/sec). Watching the lights on the hub,
> it appears that there is a really big delay restarting transmit after
> a collision occurs. Perhaps duplex set wrong?

I have seen this too but I haven't figured out what's going wrong yet.
My suspicion is that some packets are getting corrupted somehow on
transmission and then we are having to wait for a TCP retransmit.  A
tcpdump might yield some interesting information.


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