<div dir="ltr">Thanks Matt, <div><br></div><div>So it sounds like purely from database replication perspective enabling DNS by itself isn't an issue.</div><div><br></div><div>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.</div>
<div><br></div><div>Thanks!</div><div><br>Ed</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Aug 11, 2014 at 8:19 AM, Matthew Loraditch <span dir="ltr"><<a href="mailto:MLoraditch@heliontechnologies.com" target="_blank">MLoraditch@heliontechnologies.com</a>></span> wrote:<br>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><a href="https://supportforums.cisco.com/document/68701/communications-manager-security-default-and-itl-operation-and-troubleshooting#Changing_Host_Names_or_Domain_Names" target="_blank">https://supportforums.cisco.com/document/68701/communications-manager-security-default-and-itl-operation-and-troubleshooting#Changing_Host_Names_or_Domain_Names</a><u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">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.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Rebuild definitely not necessary.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Matthew G. Loraditch – CCNP-Voice, CCNA-R&S, CCDA<u></u><u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> cisco-voip [mailto:<a href="mailto:cisco-voip-bounces@puck.nether.net" target="_blank">cisco-voip-bounces@puck.nether.net</a>]
<b>On Behalf Of </b>Ed Leatherman<br>
<b>Sent:</b> Monday, August 11, 2014 8:00 AM<br>
<b>To:</b> Cisco VOIP<br>
<b>Subject:</b> [cisco-voip] Question about enabling DNS on CUCM cluster(s)<u></u><u></u></span></p><div><div class="h5">
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<p class="MsoNormal">Good morning!<u></u><u></u></p>
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<p class="MsoNormal">Was hoping someone with a little more experience on the jabber/collab edge side could point me in the right direction here.<u></u><u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal">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.<u></u><u></u></p>
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<p class="MsoNormal">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 ;)<u></u><u></u></p>
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<p class="MsoNormal">Appreciate any tips!<u></u><u></u></p>
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<p class="MsoNormal">Thanks,<u></u><u></u></p>
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<p class="MsoNormal">Ed<u></u><u></u></p>
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<p class="MsoNormal">-- <br>
Ed Leatherman<u></u><u></u></p>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>Ed Leatherman<br>
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