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Beginner

Emergency Responder not finding all switchports on Catalyst 9300 stack

We are running Cisco Emergency Responder version 11.5.4.50000-6 and trying to discover phones connected to a Catalyst 9300 stack (C9300-48P) on version 16.08.01a.  There are three member switches connected via StackWise and the stack is fully operational.   CER detects the switchports and phones connected to the switch 1 and 2, but it doesn't even detect the ports of switch 3.  I re-ran "Locate switch-port", but no success.  It's as if this stack only had two members.  I check the logs on CER and there's no indication of discovery errors.  Running CDP command on switch shows ports and phones of all members of the stack.

 

I should mention that switch 3 was added later to the stack, after switches 1 and 2 were stacked and fully operational for a while beforehand.

 

What could be causing CER to miss switch 3 of this stack?  Is there a potential compatibility issue?  Or, do one or more CER services need to be restarted?

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VIP Advisor

Re: Emergency Responder not finding all switchports on Catalyst 9300 stack

Did you see this?

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq17310

It's not much help, but at least it let's you know that others are having the same problem. I'd recommend opening a TAC case and asking about this defect, or if you have a good relationship with your Cisco SE, talk to them.

Anthony Holloway

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3 REPLIES 3
VIP Advisor

Re: Emergency Responder not finding all switchports on Catalyst 9300 stack

Did you see this?

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvq17310

It's not much help, but at least it let's you know that others are having the same problem. I'd recommend opening a TAC case and asking about this defect, or if you have a good relationship with your Cisco SE, talk to them.

Anthony Holloway

Please use the star ratings to help drive great content to the top of searches.
Beginner

Re: Emergency Responder not finding all switchports on Catalyst 9300 stack

Thanks Anthony for the quick response. I did indeed open a case with TAC.  After collecting logs and configs from both CER and the switch, they recommended that we reboot the switch stack to resolve the problem.  Apparently, this is what others did to resolve the problem.  Probably has something to do with how the 3rd member of the stack was initially brought on-line.  We'll be doing that later this week. If it doesn't resolve the problem, I'll update this posting. 

VIP Advisor

Re: Emergency Responder not finding all switchports on Catalyst 9300 stack

Ok, cool. I hope that does resolve it for you in the short term, but I also hope there's a long term fix in there somewhere too. Perhaps you can even convince TAC to update the bug with a workaround stating reboot the whole stack. I look forward to the conclusion of your adventure. Good luck!

Anthony Holloway

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