Re: CUCM Pub and Sub IP Change

Flo.Matalis · ‎04-19-2019

Hi Experts,

Need your advice.

CUCM: 10.5 (1)

I am currently doing hostname and IP change on my 3 nodes. Done doing the hostname and IP change on Pub.

Next is the Sub, hostname and IP change was successful however, when I checked from PUB the utils dbreplication runtimestate, I can still the old name but I can see from show tech network hosts on PUB that it populated the new name of the SUB.

I followed the document so not sure if there is missing or what. Please help. Thanks.

Regards,

Flo

HARIS_HUSSAIN · ‎04-20-2019

Reboot the whole cluster once more and check again.

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Thanks,
Haris

jferris1979 · ‎04-25-2019

As HARIS_HUSSAIN mentioned you could try a full reboot and see if that lines things backup but to be honest I've never had luck changing the ip/hostname of cucm servers even when following the guide. Every time I've done it, I ended up having to open a TAC case and they needed to login as root and fix the host file and some other things. The IP and hostname are referenced in many places and it doesn't seem to update them all correctly. Most of the time for a subscriber I'll opt to blow it away and just rebuild it with the new IP.

Flo.Matalis · ‎05-08-2019

Thanks for your replies. I tried to do full reboot on the cluster but still no good. What I did was I changed the IP address first, then once done, change the hostname. Kind of double work but it was successful. Had to coordinate with the DNS team to change the entries again and again.

Mike_Brezicky · ‎05-08-2019

If the entries are not updating, you can try to run through repairing the database and replication.
https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/200396-Steps-to-Troubleshoot-Database-Replicati.html

Its a very sensitive and tricky aspect, so if you are not 100% comfortable working with the dbreplication, I highly suggest opening a TAC case for assistance. I know I have even blown up a database and entire cluster by being over confident.