strange problem FreeBSD-8.1-Release

[Mike Tancsa]

On 8/17/2011 7:46 AM, Sami Halabi wrote:
> Hi,
> I have a FBSD router base on version 8.1-RELEASE-p4.
> Today at 13:00 approx i had a sudden fall down of the traffic on the graphs
> on all ports.
> the strange thing is that no connection was lost, but the traffic like went
> down.
> on the logs i had these lines only:
> Aug 17 12:59:45 bgpServer kernel: em2: Watchdog timeout -- resetting
> Aug 17 12:59:45 bgpServer kernel: em2: link state changed to DOWN
> Aug 17 12:59:48 bgpServer kernel: em2: link state changed to UP
> 
> anyone ever faced this problem? any ideas how i can track down what happened
> there?

Until I saw the em errors, I was thinking you are just running into the
32bit counter limitations of snmp.  e.g. an example graph at
http://www.tancsa.com/overflow.png

more info at

http://www.cisco.com/en/US/tech/tk648/tk362/technologies_q_and_a_item09186a00800b69ac.shtml

However, the em2 suggests a possible driver error.  There have been a
number of bug fixes to the em driver since 8.1-R. If possible, going to
8.2 or even RELENG_8 might help.
also,
what does
sysctl -a dev.em
show ?


	---Mike



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Mike Tancsa, tel +1 519 651 3400
Sentex Communications, mike at sentex.net
Providing Internet services since 1994 www.sentex.net
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