I have two endpoints configured to register with a Cisco VCs over a WAN connection however the endpoints have failed to register with the H323 id as I always get the error "gatekeeper registrations retries expired". though it registers with the SIP protocol but automatically unregisters after about a 60sec.
I have checked the Cisco VCS event logs and could not find any h323 registration request for the endpoint in the event log, for the sip registrations, it actually shows that the endpoint registered unregistered because endpoint became unresponsive.
I agree with Andrey. You will need to verify all the messages are sent and received on each end. You can do this by taking a tcpdump on each side or by taking a debug diagnostic log on the VCS and depending on what protocol you are troubleshooting and the endpoint the logs vary:
For a TC endpoint you can log in as admin
log output on
to debug H323
log ctx H323Packet debug 9
to debug SIP
log ctx SipPacket debug 9
and of course a tcpdump or port span can also be done.
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