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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Garamond",serif;color:#1F497D">I’m not sure if two SRST boxes would trigger this, but I know when you create a loop which doesn’t resolve on both ends (context: a DP to your SIP trunk that matches
all, followed by a DP to your CM that matches all) it’ll loop back and forth until a timeout period, after which is goes busy.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Garamond",serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Garamond",serif;color:#1F497D">I am curious though, why do you need SRST for the upgrades? Do you not have a publisher and subscriber that you could fail between?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Garamond",serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:10.0pt;font-family:"Garamond",serif;color:#3B3838">Ben Amick<o:p></o:p></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:9.0pt;font-family:"Garamond",serif;color:#3B3838">Telecom Analyst</span><span style="font-size:9.0pt;font-family:"Garamond",serif;color:#666666"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Garamond",serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>From:</b> cisco-voip [mailto:cisco-voip-bounces@puck.nether.net]
<b>On Behalf Of </b>Lelio Fulgenzi<br>
<b>Sent:</b> Thursday, May 04, 2017 1:30 PM<br>
<b>To:</b> voyp list, cisco-voip (cisco-voip@puck.nether.net) <cisco-voip@puck.nether.net><br>
<b>Subject:</b> [cisco-voip] using two 3945s for SRST during upgrades - how to create voip dial-peer statements without causing a loop?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello folks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Question regarding voip dial-peers. I’ve had some experience, but my design skills are lacking, especially when it comes to something like I’m trying to do.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Basically, I’d like to take advantage of our two 3945 routers and failover as many phones as possible. Problem is, it will be too difficult to fail them over in ranges.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Can I create a dial-peer that says “5…. Pointer to router A” on router B, and “5…. Pointer to router B” on router A and not cause any routing loops?
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is there a built in mechanism that prevents this? Is there something I need to configure?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If it’s too complicated and requires testing and time, I may have to forfeit the idea of using two routers and use just one and selectively pick those who failover. I mean, we have to do it anyways, since we have more than the two routers
could handle. And it’s a migration model that I might chose to use anyways, i.e. keep one router connected to the cluster and one not.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thoughts?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Lelio<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">---<o:p></o:p></p>
<p class="MsoNormal">Lelio Fulgenzi, B.A.<o:p></o:p></p>
<p class="MsoNormal">Senior Analyst, Network Infrastructure<o:p></o:p></p>
<p class="MsoNormal">Computing and Communications Services (CCS)<o:p></o:p></p>
<p class="MsoNormal">University of Guelph<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">519-824-4120 Ext 56354<o:p></o:p></p>
<p class="MsoNormal"><a href="mailto:lelio@uoguelph.ca">lelio@uoguelph.ca</a><o:p></o:p></p>
<p class="MsoNormal"><a href="http://www.uoguelph.ca/ccs">www.uoguelph.ca/ccs</a><o:p></o:p></p>
<p class="MsoNormal">Room 037, Animal Science and Nutrition Building<o:p></o:p></p>
<p class="MsoNormal">Guelph, Ontario, N1G 2W1<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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