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

[Ed Leatherman]

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> 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.
>
>
>
>
>
> [image: cid:image001.jpg at 01C95158.4441E1B0]
>
> Matthew G. Loraditch – CCNP-Voice, CCNA-R&S, CCDA
>
> 1965 Greenspring Drive
> Timonium, MD 21093
>
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> fax.  410.252.9284
>
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>
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>
>
> *From:* cisco-voip [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
>
>
>
>
>
>
>
> --
> Ed Leatherman
>



-- 
Ed Leatherman
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