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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Lelio,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">So the phones will still get an ITL file in a “Prepare Cluster for Rollback” scenario but it should be a blank ITL allowing the phones to trust everything.
If you open the trust list on the phone, you should see there are no TFTP servers defined in that scenario.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">That explains the first thing you saw.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">For the 2<sup>nd</sup> issue, it sounds like your offline cluster possibly was still serving out the blank ITL. Restarting TFTP service may help there. You’d
need to check the trust list on the phones and actually see what the phones got in that scenario.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Brian<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> cisco-voip [mailto:cisco-voip-bounces@puck.nether.net]
<b>On Behalf Of </b>Lelio Fulgenzi<br>
<b>Sent:</b> Wednesday, February 19, 2014 4:38 PM<br>
<b>To:</b> cisco-voip voyp list<br>
<b>Subject:</b> [cisco-voip] unexpected behaviour with "Prepare Cluster for Rollback" and migrating phones between v9 and v7 cluster<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><br>
OK, now I am officially confused. ;)<br>
<br>
I was under the impression that once a phone has registered to a v9 cluster, it downloads an ITL trust list/file which prevents it from registering to a v7 cluster. To help with this, the "Prepare Cluster for Rollback" enterprise parameter was introduced.<br>
<br>
Here's what I did:<o:p></o:p></span></p>
<ul type="disc">
<li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">upgraded offline cluster (all servers had same hostname and IP address)<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">set the "Prepare Cluster for Rollback" parameter to True and clicked Save (because there were no phones registered, I did not "Apply Changes")<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">plugged phones into the offline network<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">phones registered to the new offline v9 cluster<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">checked phone security pages - they showed ITL files listed (that long string of numbers)<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">thinking it was the "Apply Changes" that missed something, I clicked that<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">phones restarted, but still showed an ITL file<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">brought a phone back to the live network, phone registered to the v7 cluster (still has an ITL file listed)<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">on offline cluster, change the "Prepare Cluster for Rollback" to False, clicked Save, clicked Apply Changes (phones restarted, and showed an ITL file)<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">I picked up one of the phones from the offline network (now in rollback=false mode) and brought it to the live network. It registered to the v7 cluster.<o:p></o:p></span></li></ul>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">So what I see are a few things confusing me:<o:p></o:p></span></p>
<ul type="disc">
<li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Why do phones still have ITL files if the cluster is in rollback mode. This is not a big deal, but I'd like to be able to tell from the phone when it's registered with the "Prepare Cluster for
Rollback" set to TRUE.<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Why does a phone that registers to a v7 cluster still have it's ITL file set?<o:p></o:p></span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Why (and this is the one that gets me) does a phone that was on v9 with "Prepare Cluster for Rollback" set to FALSE successfully register to the v7 cluster?<o:p></o:p></span></li></ul>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Is the ITL trust list a simple hash of the IP addresses and host names of the cluster members? If I don't change anything, things will continue to work?<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Is something wrong with my logic and steps? I was testing with a 7942 and a 7962.<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Lelio<o:p></o:p></span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">---<br>
Lelio Fulgenzi, B.A.<br>
Senior Analyst, Network Infrastructure<br>
Computing and Communications Services (CCS)<br>
University of Guelph<br>
<br>
519</span><span style="font-size:10.0pt;font-family:"Cambria Math","serif";color:black">‐</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">824</span><span style="font-size:10.0pt;font-family:"Cambria Math","serif";color:black">‐</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">4120
Ext 56354<br>
<a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a><br>
<a href="http://www.uoguelph.ca/ccs">www.uoguelph.ca/ccs</a><br>
Room 037, Animal Science and Nutrition Building<br>
Guelph, Ontario, N1G 2W1<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><o:p> </o:p></span></p>
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