CUCM PUB and TFTP Server IP address change

[mannycho]

Hello,

I am changing the IP address of a Publisher and TFTP server, but the hostname and FQDN will not be changing. I would not have to generate new tomcat certs or have any concerns with ip phones registering with the TFTP server after ip address change after updating option 150

[Leonardo Santana]

Hi,

Check this link because there are pre checks and post checks of this change.

https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/install/12_5_1/ipchange/cucm_b_change-ip-address-hostname-1251.html 

[mannycho]

Thanks for sharing the link, i was aware of the system health, pre and post checks. i was looking for confirmation from someone that has done this, that the process did not cause an issue with the tftp server, phone registering and re-issuing of certificates. if you have not done this before please do not reply

[Roger Kallberg · Accepted solution]

We have done a change of IP that you ask about and apart from the IP changes and updates for the DHCP scopes for option 150 there was nothing more to be done. The certificates would not be affected as your not changing the FQDN and the phones would still trust the cluster as the ITL is not changing, given that you have your CM setup with FQDN and not IP as was the pre-dominant way of setup prior to Jabber being a thing.

[mannycho]

Thanks Roger, servers are configured with FQDN in CUCM.