On Sun, Feb 11, 2001 at 06:27:09PM +0100, Deim Agoston wrote:
> > Deim, you should troubleshoot this by running tcpdump at various points in
> > the network. (A Linux laptop is very handy for this.) OTOH, the quick
> > solution might be to just power-cycle all the switches...
> Ah, yes. I've done it three times and once I halted the server. But it
> didn't help. Any other ideas ?
Try tcpdump at various points and see if ARP requests are being fully
propogated around the network. Take two machines that can't ping
each other. Start one of them pinging. Check that you can see the
ARP requests at other ports on the same switch. Then check if you
can see the ARP requests at ports on other switches. (You should be
able to, since these are broadcast frames.) Then check if the target
machine is answering these ARP requests. Then see how far these
ARP requests get on their way back to the source host.
This might help to isolate the problem to a single switch or host or
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