[cisco-voip] Question about enabling DNS on CUCM cluster(s)

[Ryan Ratliff (rratliff)]

Kind of makes me want to enable mixed-mode on the 2nd cluster.

If you've got the eTokens handy then it will certainly make you life a lot easier when it comes to SBD and endpoints.

-Ryan

On Aug 11, 2014, at 8:41 AM, Ed Leatherman <ealeatherman at gmail.com<mailto:ealeatherman at gmail.com>> wrote:

Thanks Matt,

So it sounds like purely from database replication perspective enabling DNS by itself isn't an issue.

If I do need to change the domain or hostnames on the cluster then it becomes a certificate operation of some variety depending on the security state of the particular cluster - in addition to minding replication. Kind of makes me want to enable mixed-mode on the 2nd cluster.

Thanks!

Ed


On Mon, Aug 11, 2014 at 8:19 AM, Matthew Loraditch <MLoraditch at heliontechnologies.com<mailto:MLoraditch at heliontechnologies.com>> wrote:
https://supportforums.cisco.com/document/68701/communications-manager-security-default-and-itl-operation-and-troubleshooting#Changing_Host_Names_or_Domain_Names

Take a look there, pretty much covers every scenario, I just did a multi-node with ITL only for the same reasons as you and it worked like a charm.

Rebuild definitely not necessary.


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From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net>] On Behalf Of Ed Leatherman
Sent: Monday, August 11, 2014 8:00 AM
To: Cisco VOIP
Subject: [cisco-voip] Question about enabling DNS on CUCM cluster(s)

Good morning!

Was hoping someone with a little more experience on the jabber/collab edge side could point me in the right direction here.

I have 2 CUCM clusters that I am researching configuring jabber and/or collab edge for. Up till now I've never had a need for DNS resolution on the either. One of them has been operational since version 3 dot something and back then it seemed the recommendation to stay away from DNS in general on CUCM unless there was a good reason otherwise.

I see there are just a few commands to enable it and setup servers etc - are there any gotchas with database replication or security that I need to be aware of? I don't plan on changing the hostname of the servers themselves or their IP addresses.

The old cluster has CTLs/USB tokens. The "slightly" newer cluster is just running in security-by-default mode. Both clusters are @ version 9.1.

My research thus far seems to say turning DNS up on earlier versions of CUCM required rebuilds but seems to not be the case now, but I haven't turned up anything in the official docs. I have a TAC case open to ask about it but I'm still at the explain DNS and what my business case is stage ;)

Appreciate any tips!

Thanks,
Ed



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Ed Leatherman



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Ed Leatherman
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