[cisco-voip] using two 3945s for SRST during upgrades - how to create voip dial-peer statements without causing a loop?

[NateCCIE]

You can use COR to limit the inbound dial-peer on the router from seeing the
outbound dial-peer that goes to the other SRST box.  Easy peasy.

-Nate

-----Original Message-----
From: cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of
Lelio Fulgenzi
Sent: Thursday, May 04, 2017 11:30 AM
To: voyp list, cisco-voip (cisco-voip at puck.nether.net)
<cisco-voip at 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
lelio at uoguelph.ca
www.uoguelph.ca/ccs
Room 037, Animal Science and Nutrition Building
Guelph, Ontario, N1G 2W1