CUCM System Version 9.1.2

[Ronald Marx]

Have a centralized call processing cluster over an IP WAN.

When you go to CUCM Admin / System / Server, you see Host Name / IP Address with IP addresses and the cooresponding names / descriptions.

Does anyone have the process steps for changing the existing DNS server IPs ?

Is this just a matter of accessing the CUCM Pub / Subs and via CLI and doing a " set dns primary <ip addrs> and then settting the secondary via "set dns secondary <ip addrs> and then do the same for each subscriber?

Is there any required changes for the cluster ELM ?

[Nadeem Ahmed]

hello Ronald,

This might help  you.

https://supportforums.cisco.com/discussion/12089806/changing-dns-server-addrresses-cucm-9-cluster

Br,

nadeem

[Ronald Marx]

Hello Nadeem,

Thank you for the super responsive reply..!

I see a couple different comments about having to make any changes to the ELM and if a license rehost would be needed or not...  was there a conclusion  or consenus on having to rehost license files?

Thx... Ron

[Nadeem Ahmed]

as already mentioned but yes last post was really make chaos out here. but this does not required to re-host the license you just need remove PI and re-add before and after changes

admin:set network dns primary X.X.X.X

WARNING: To avoid license synchronization failures, delete the 
         product instance from the Enterprise License Manager 
         managing this server's licenses before changing network
         settings.You will have to re-add the product instance
         after the network settings have been changed.

[pkinane]

Hey Ron,

I hope all is well. Here is a little more information for you and others that might have the same questions.

CSCul10528 and CSCuj83605