Ip phone stuck in registration state after asa cluster master role switchover

[jain.nitin]

Hi I am running asa cluster on my three sites. Each site has pair of asa working in cluster. These clusters are gateway for all vlans including ip phone vlans. What we noticed that when ever there is switchover of asa role say master reload or fails slave becomes master ip phones goes into phone is registering state and phones does not register until we reboot phone or we wait for an hour then phone registers automatically...any idea ? We are running 9.6.2.7 code and 9.4.2 mostly on every site.

[Manish Gogna]

To start with you can recreate the issue and take parallel packet captures from one of the IP phones , TFTP server and the primary cucm server to which it is trying to register. This will give an idea if all the packets exchanged between CUCM and IP phone are making it to respective destinations ( filter the SIP , SCCP , TFTP traffic to begin with ). You can set up a capture on ASA as well to see if it is allowing the signaling between CUCM and IP phone in both directions and determine which part of the topology has a problem.

Manish

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