Hello all,
We are in a scenario where our customer has IP phones on WAN-A with CUCM cluster hosted in a DC. Customer will be moving to a new WAN-B and there will be NO IP connectivity for the IP phones in WAN-A to WAN-B (customer choice) except for the CUCM servers in the DC.
When moving to WAN-B customer will be deploying new laptops with Jabber on so we need to change the CUCM server name to FQDN's in the DC. WAN-B will be a public cloud & users will use Jabber access the CUCM through MRA on Expressways.
There will be seperate DNS servers in WAN-A & WAN-B (both having entries for the CUCM servers) and we need both to work at the same time as it will be a phased migartion for users over a few months (again - customer choice). IP phones & WAN-A will then be redundant at the end of the migration.
If we configure the CUCM servers with the DNS servers in WAN-B, will the IP phones be able to resolve the CUCM hostnames from the DNS servers in WAN-A or will the IP phones attempt to resolve the FQDN's through the DNS servers configured on CUCM?
Many thanks in advance.
