Subject: Re: Odd behavior--explainable?
To: None <tech-net@NetBSD.ORG>
From: Allen Briggs <firstname.lastname@example.org>
Date: 06/19/1998 08:24:43
> It would be interesting to know what the collision rate was like.
Nil. I ran netstat -i 5 on the -current machine and got on the order of
300 packets in 5 seconds with 6-10 collisions, then nothing for the next
interval, then another 300 / 6-10, then nothing, etc...
I should mention that I ran tcpdump on the -current machine (the
one running ftpd), not the 1.3.1 machine (running the ftp client). I
don't know if running ping would have had the same effect. I can try to
reproduce the behavior. Both systems do hard-code the media type to
100baseTX, but I have seen the odd behavior with the media auto-detection.
I'm seeing the de0 driver change the Tx threshold a couple times:
de0: abnormal interrupt: transmit underflow (raising TX threshold to 8|512)
de0: abnormal interrupt: transmit underflow (raising TX threshold to 1024)
Does this help?
Allen Briggs - email@example.com