3750 stack loss of console/telnet, but still running

drumrb0y · ‎06-16-2008

This morning, we lost the ability to access our 3750 stack via *any* means - telnet, ssh, console access are all dead. The master of the stack has also moved from #1 to #4(the bottom)

However, the stack continues to operate normally and we're going to attempt to reboot the stack during an off-hours time to see if this fixes the problem.

Any theories as to a possible cause?

Thanks,

Marc

glen.grant · ‎06-16-2008

Once you regain ability to get to the stack I would check to see if the switch priority was ever set for the stackmaster . IT shouldn't change on its own if this was done. Priority should be 15 for the stackmaster and backup should be 14 or a number lower than 15 . The stackmaster could have rebooted itself and thus a different switch became stackmaster. Look for bugs for the version you are running.

drumrb0y · ‎06-16-2008

I think these were set; I can verify later.

Even so, if the stack master were to change, that shouldn't disable telnet, ssh or even console; losing console access, to me, is a clear indicator of software error - we just don't want to reboot the stack in the middle of a business day to find out.