Both machines have hung their network interfaces for 2-3 minutes at a time,
to the point that I have a script that runs and downs then re-ups them if a
ping to the router fails.
What networking card are you using?
Also, when you get the machine into such a state of stuck TCP sockets,
two pieces of data are extremely useful:
1) Whether the kernel is printing out "socket destroy delayed"
messages into the logs/console.
2) Raw /proc/net/tcp output, so that I can see which timers are active
which should be destroying the sockets after some time.
Thanks.
Later,
David S. Miller
davem@dm.cobaltmicro.com
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