<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: verdana,helvetica,sans-serif; font-size: 10pt; color: #000000'><br>Thanks for the clarification Brian. This really helps. <br><br>I was able to confirm that:<br><ul><li>I could change the PC port setting to 100 Full on the phone with the empty ITL file</li><li>I could NOT change the PC port setting to 100 Full on the phone with the non-empty ITL file</li></ul><div><br>For the heck of it, I compared to the two CallManager.pem files and they are, in fact, different. There was no TVS certificate on the v7 cluster members, so no comparison there. <br><br>I think I have everything I need to continue with my testing scenarios.<br><br>I hope this thread proves useful for others.<br><br>Lelio<br><br>---<br>Lelio Fulgenzi, B.A.<br>Senior Analyst, Network Infrastructure<br>Computing and Communications Services (CCS)<br>University of Guelph<br><br>519‐824‐4120 Ext 56354<br>lelio@uoguelph.ca<br>www.uoguelph.ca/ccs<br>Room 037, Animal Science and Nutrition Building<br>Guelph, Ontario, N1G 2W1<span name="x"></span><br></div><br><hr id="zwchr"><div style="color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><b>From: </b>"Brian Meade (brmeade)" <brmeade@cisco.com><br><b>To: </b>"Lelio Fulgenzi" <lelio@uoguelph.ca>, "cisco-voip voyp list" <cisco-voip@puck.nether.net><br><b>Sent: </b>Thursday, February 20, 2014 11:21:03 AM<br><b>Subject: </b>RE: [cisco-voip] unexpected behaviour with "Prepare Cluster for Rollback" and migrating phones between v9 and v7 cluster<br><br>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Lelio,</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The trust list definitely contains the certificates. The actual ITL will be signed by the CallManager.pem certificate of the TFTP node the phone downloaded
it from. It will also have a TFTP entry for that node with the same CallManager.pem certificate. The ITL should then have a bunch of TVS certificates for all of your nodes in order to be used for authenticating any unknown certificates.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">So you said the old cluster it was registering to was 7.x, right?</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If so, the phones with a valid ITL should be requesting signed config files which the 7.x should be responding to with File Not Found errors.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If the phones used their cached config files, they would probably be able to register to the old cluster since the IP addresses are the same and there’s nothing
preventing the phone from sending SCCP register messages to the old cluster. Things like line changes are done via SCCP so adding a second DN would probably work but any changes on the device itself would probably fail such as enabling or disabling web access
since that is set in the actual config file.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks,</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Brian Meade</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> Thursday, February 20, 2014 10:50 AM<br>
<b>To:</b> cisco-voip voyp list<br>
<b>Subject:</b> Re: [cisco-voip] unexpected behaviour with "Prepare Cluster for Rollback" and migrating phones between v9 and v7 cluster</span></p>
</div>
</div>
<p class="MsoNormal"> </p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><br>
As a follow up to this, I'm still a little confused.<br>
<br>
I have confirmed</span></p>
<ul type="disc">
<li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">that the phone that I removed after setting the "Prepare Cluster for Rollback" to True, had an empty trust list</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">that the phone that I removed after setting the "Prepare Cluster for Rollback" to False, had an non-empty trust list</span></li></ul>
<ul type="disc">
<ul type="circle">
<li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level2 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">TFTP: fqdn of TFTP server</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level2 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">TVS: fqdn of PUB</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level2 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">TVS: fqdn of SUB1</span></li></ul>
</ul>
<ul type="disc">
<li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l3 level1 lfo1">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">this was with only changing the parameter and resetting phones, no restarts of TFTP or TVS services.</span></li></ul>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">I was also able to confirm that:</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"">both the phone with an empty trust list AND non-empty trust list were able to register to the old cluster</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"">I was able to change the configuration (adding a secondary DN) to both phones and they both accepted them</span></li></ul>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Is the trust list simply a _list_ of acceptable hosts? And because the (fqdn) hostnames and IP addresses are the same on both clusters the phones are still able to register and
accept changes?</span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> </span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">If not simply a list, and it uses the host certificates, i.e. it uses host certificates to either build the list hash or push the certificates down to the phones, is what I am
seeing the same certificate being generated on each host? I mean, I'm using all the same information, could that be possible? I don't know which certificates to compare, or I would have provided the results of that test.</span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> </span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Thoughts?</span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> </span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Lelio</span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> </span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> </span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> </span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"> </span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black"><br>
<br>
</span></p>
<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">---</span></p>
<div>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">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" target="_blank">lelio@uoguelph.ca</a><br>
<a href="http://www.uoguelph.ca/ccs" target="_blank">www.uoguelph.ca/ccs</a><br>
Room 037, Animal Science and Nutrition Building<br>
Guelph, Ontario, N1G 2W1</span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-family:"Helvetica","sans-serif";color:black">From:
</span></b><span style="font-family:"Helvetica","sans-serif";color:black">"Lelio Fulgenzi" <<a href="mailto:lelio@uoguelph.ca" target="_blank">lelio@uoguelph.ca</a>><br>
<b>To: </b>"cisco-voip voyp list" <<a href="mailto:cisco-voip@puck.nether.net" target="_blank">cisco-voip@puck.nether.net</a>><br>
<b>Sent: </b>Wednesday, February 19, 2014 4:37:35 PM<br>
<b>Subject: </b>unexpected behaviour with "Prepare Cluster for Rollback" and migrating phones between v9 and v7 cluster</span></p>
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OK, now I am officially confused. ;)<br>
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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>
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Here's what I did:</span></p>
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<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">upgraded offline cluster (all servers had same hostname and IP address)</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo3">
<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")</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo3">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">plugged phones into the offline network</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo3">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">phones registered to the new offline v9 cluster</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo3">
<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)</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo3">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">thinking it was the "Apply Changes" that missed something, I clicked that</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo3">
<span style="font-size:10.0pt;font-family:"Verdana","sans-serif"">phones restarted, but still showed an ITL file</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo3">
<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)</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo3">
<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)</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l2 level1 lfo3">
<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.</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:</span></p>
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<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.</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo4">
<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?</span></li><li class="MsoNormal" style="color:black;mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo4">
<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?</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?</span></p>
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<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.</span></p>
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<p><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Lelio</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>
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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" target="_blank">lelio@uoguelph.ca</a><br>
<a href="http://www.uoguelph.ca/ccs" target="_blank">www.uoguelph.ca/ccs</a><br>
Room 037, Animal Science and Nutrition Building<br>
Guelph, Ontario, N1G 2W1</span></p>
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