[cisco-voip] DNS Change - CUCM/UNITY/IMP/EPRESSWAY

[Matthew Loraditch]

For the first two no, for the last three if they are using DNS on those things then yes you will need to update them. For the gateways, look at your MGCP/SCCP/CCM-Manager configs if they have hostnames in them and/or a sh ccm-manager shows hostnames, you will need to update for sure.

For the handsets that would go along with DHCP, DHCP would be handing out DNS, if you can run both DNSs in parallel for a bit you can just update the scope and all will get it at the next lease update. If not you'd want to schedule a reset in order to force them to pull the new data.


Matthew Loraditch
Sr. Network Engineer
p: 443.541.1518
w: www.heliontechnologies.com  |  e: MLoraditch at heliontechnologies.com
From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Jon Fox
Sent: Tuesday, November 14, 2017 5:22 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] DNS Change - CUCM/UNITY/IMP/EPRESSWAY


Hello all.


Just looking for a little guidance

We are potentially looking at changing our DNS Servers that our voice servers use.
I am looking for some advice/guidance/ clarification and the process of each of our voice servers.

For example will i need to re-host the licenses.
Will i need to re-generate certificates.
Will i need to make changes on our VGs/MGCP Gateways?
Will i need to reboot all the handsets?
Will i need to make changes to the DHCP Server and its options.


Server Versions below:
CUCM - 10.5.1 (Mixed Mode)
IMP 10.5.1
UNITY 9.1.2
EXPRESSWAY C/E - 8.7


Many thanks
JF
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