From owner-freebsd-questions  Mon Jan 28  7:57:52 2002
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Date: Mon, 28 Jan 2002 07:57:23 -0800 (PST)
From: FreeBSD Questions <freebsdquestions@yahoo.com>
Subject: fxp0: SCB timeout errors
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I am using FreeBSD-4.4-STABLE

Every few days, my Dell PowerEdge 1550 with integrated
dual Intel Pro/100+ NICs (only one of which is plugged
in currently) gets VERY slow, with the CPU going to
100% utilized (normally it is around 25-50% utilized)
and my "syslogd" process is taking up a lot of
processor time, and I get tons of entries in my
/var/log/messages file, like this:

bob# tail /var/log/messages
Jan 23 16:55:12 bob /kernel: fxp0: SCB timeout: 0x70
0x0 0x50 0x0
Jan 23 16:55:12 bob /kernel: fxp0: SCB timeout: 0x80
0x0 0x50 0x0
Jan 23 16:55:13 bob last message repeated 5 times
Jan 23 16:55:13 bob /kernel: fxp0: SCB timeout: 0x70
0x0 0x50 0x0
Jan 23 16:55:13 bob /kernel: fxp0: SCB timeout: 0x80
0x0 0x50 0x0
Jan 23 16:55:16 bob last message repeated 29 times
Jan 23 16:55:16 bob /kernel: fxp0: SCB timeout: 0x70
0x0 0x50 0x0
Jan 23 16:55:17 bob /kernel: fxp0: SCB timeout: 0x80
0x0 0x50 0x0
Jan 23 16:55:19 bob last message repeated 15 times
Jan 23 16:55:19 bob /kernel: fxp0: SCB timeout: 0x70
0x0 0x50 0x0

And it just goes on and on, generating a ton of
messages until a reboot.

After a reboot, the system comes up just fine and runs
for a few more days without any SCB timeout errors in
the log. Then without any indication of why it
happened, it just gets flooded with these timeouts
again and the system becomes very slow until I reboot.

Can anyone tell me what might be the problem, or give
me some hints on where to start diganosing it?

Thanks in advance for your help.

Chad

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