[Ilugc] Weird network problem
- From: joe_steeve@xxxxxxx (Joe Steeve)
- Date: Mon Jul 31 15:33:00 2006
Girish Venkatachalam wrote:
Try clearing the ARP caches completely once in a while. You can try
clearing the Cisco router ARP entry then.
Other than that what does ifdown/ifup do? It might do much more but
this seems to be a good reason to me.
Hmm., I'll have to check the ARP cache of the 'cisco router' next time
this happens. But when the issue happens., the 'Cisco router' routes all
other packets correctly to the 'ISP router'., so that address could not
be screwed. It is possible that the cache entry for the 'mailserver' is
screwed. However, when the issue happens., the 'Cisco router' responds
to pings from the 'mailserver'. That means., it does have the correct
MAC address entry in the cache.
Anywayz., I'll check this the next time the issue happens.
One good thing to do would be to figure out how often ur mail server
talks out on the network. Dumping tcpdump to a file and analyzing
what goes wrong when would help.
This is something that should be helpful. I did not try this. I can do
this on the 'firewall' box.
--
.o. A proud GNU user
..o
ooo [W]
http://www.joesteeve.org/
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