[cisco-voip] Enable DNS

[Brian Meade]

Right.  But download a backup of the key before doing anything.  Usually
the phones will all register fine after an ITL issue.  You'll usually just
see new config updates not trusted.  This can be a really big deal if you
use Extension Mobility though and the phone configs are changing all the
time as people sign in/out.

On Tue, Nov 11, 2014 at 11:58 AM, Heim, Dennis <Dennis.Heim at wwt.com> wrote:

> With the recovery key thing, will that process work after you have screwed
> yourself and the phones won’t register?
>
>
>
> *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 11:49 AM
>
> *To:* Heim, Dennis
> *Cc:* cisco-voip at puck.nether.net
> *Subject:* Re: [cisco-voip] Enable DNS
>
>
>
> 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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