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.
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?
Ben Amick
Telecom Analyst
From: cisco-voip [mailto:cisco-voip-boun...@puck.nether.net] On Behalf Of Lelio
Fulgenzi
Sent: Thursday, May 04, 2017 1:30 PM
To: voyp list, cisco-voip (cisco-voip@puck.nether.net)
<cisco-voip@puck.nether.net>
Subject: [cisco-voip] using two 3945s for SRST during upgrades - how to create
voip dial-peer statements without causing a loop?
Hello folks,
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.
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.
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?
Is there a built in mechanism that prevents this? Is there something I need to
configure?
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.
Thoughts?
Lelio
---
Lelio Fulgenzi, B.A.
Senior Analyst, Network Infrastructure
Computing and Communications Services (CCS)
University of Guelph
519-824-4120 Ext 56354
le...@uoguelph.ca<mailto:le...@uoguelph.ca>
www.uoguelph.ca/ccs<http://www.uoguelph.ca/ccs>
Room 037, Animal Science and Nutrition Building
Guelph, Ontario, N1G 2W1
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