[cisco-voip] Enable DNS

[Brian Meade]

Since you're on 10.5, you can also take a backup of the ITL recovery key
that you can use to recover with if anything goes wrong:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/rel_notes/10_0_1/delta/CUCM_BK_C206A718_00_cucm-new-and-changed-1001/CUCM_BK_C206A718_00_cucm-new-and-changed-1001_chapter_010.html#CUCM_RF_S1EF9820_00

Make sure all the devices are using a CM Group with both servers in it so
they have a 2nd TVS server they can use and just do one server at a time
making sure the phones get the updated ITLs before doing the next server.

You could be really safe and set "Prepare Cluster for Rollback to 8.x" to
"True", make your DNS changes, then change it back to "False".

Brian

On Tue, Nov 11, 2014 at 11:21 AM, Heim, Dennis <Dennis.Heim at wwt.com> wrote:

> I meant ITL’s. We are in non-secure mode, so ITL’s only. This is 10.5SU1.
>
>
>
> *Dennis Heim | Collaboration Solutions Architect*
>
> World Wide Technology, Inc. | +1 314-212-1814
>
> [image: twitter] <https://twitter.com/CollabSensei>
>
> [image: chat][image: Phone] <+13142121814>[image: video]
>
>
>
>
>
> *From:* bmeade90 at gmail.com [mailto:bmeade90 at gmail.com] *On Behalf Of *Brian
> Meade
> *Sent:* Tuesday, November 11, 2014 11:08 AM
> *To:* Heim, Dennis
> *Cc:* cisco-voip at puck.nether.net
> *Subject:* Re: [cisco-voip] Enable DNS
>
>
>
> What CUCM version?  Also you mention CTLs so is this a mixed-mode cluster?
>
>
>
> On Tue, Nov 11, 2014 at 10:39 AM, Heim, Dennis <Dennis.Heim at wwt.com>
> wrote:
>
> I have a 2 node cluster that currently has DNS disabled. My intention is
> to configure and enable DNS. I know this will regenerate all the
> certificates at once. My understanding is that as long as I do not do both
> nodes at the same time and all the endpoints register with the other server
> all will be well. However, any endpoints that are offline will require
> their CTL’s to be cleared.
>
>
>
> Has anyone seen anything different?
>
>
>
> *Dennis Heim | Collaboration Solutions Architect*
>
> World Wide Technology, Inc. | +1 314-212-1814
>
> [image: twitter] <https://twitter.com/CollabSensei>
>
> [image: chat][image: Phone] <+13142121814>[image: video]
>
>
>
>
>
>
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>
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