network dropouts

["Jan Kundrát" <jan.kundrat@fzu.cz>]

Hi,
I had two ssh connection idle for some time, and suddenly the connection 
"broke", no responses from ping. Using 3c59x NIC.

Kernel log:

after calling `wm destroy ttylinux`:

Dec 12 20:30:52 zirafa device vif3.0 left promiscuous mode
Dec 12 20:30:52 zirafa xen-br0: port 2(vif3.0) entering disabled state
Dec 12 20:30:52 zirafa xen-br0: port 2(vif3.0) entering disabled state
Dec 12 20:33:23 zirafa xen-br0: port 1(eth0) entering disabled state
Dec 12 20:34:23 zirafa xen-br0: port 1(eth0) entering learning state
Dec 12 20:34:23 zirafa xen-br0: topology change detected, propagating
Dec 12 20:34:23 zirafa xen-br0: port 1(eth0) entering forwarding state


...machine worked ok, I can see messages from cron in syslog...

maybe this is the time I tried to press some key in ssh connection to 
domain0, +/- 1 minute or so:

Dec 12 21:12:23 zirafa xen-br0: port 1(eth0) entering disabled state
Dec 12 21:13:23 zirafa xen-br0: port 1(eth0) entering learning state
Dec 12 21:13:23 zirafa xen-br0: topology change detected, propagating
Dec 12 21:13:23 zirafa xen-br0: port 1(eth0) entering forwarding state

(login from serial console to see what happens)

Dec 12 21:13:31 zirafa login(pam_unix)[7594]: session opened for user 
root by (uid=0)

(network connectivity restored)

I have no idea why is there 1 minute delay, according to syslog. Network 
cable was *not* unplugged.



BTW, this is what happens when I unplug cable from eth0 (unplugged at 
21:27:50, re-plugged at 21:28:33):

Dec 12 21:28:23 zirafa xen-br0: port 1(eth0) entering disabled state
Dec 12 21:29:23 zirafa xen-br0: port 1(eth0) entering learning state
Dec 12 21:29:23 zirafa xen-br0: topology change detected, propagating
Dec 12 21:29:23 zirafa xen-br0: port 1(eth0) entering forwarding state

Is it normal?

j.



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