[cisco-voip] SIP trunk failover question

[Robert Kulagowski]

On Tue, May 14, 2013 at 1:32 PM, Ryan Ratliff <rratliff at cisco.com> wrote:
> You may also want to look at the behavior available to you by having
> multiple route groups in a route list vs multiple devices in the RG.
> http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/6_0_1/ccmsys/a03rp.html#wp1045311
> does a decent job of covering this.

Can you dive a little deeper into this?

For my SIP testing, I've got a single route group, and in that route
group I have the SIP trunk first, then H.323 gateways after it. During
my testing the 2851 stopped responding; even with the ethernet port
shut down on the switch side (thereby removing any traffic if it was
due to a DOS), I still couldn't get a response on the console port,
and had to have remote hands reboot it. It was still "up" enough to
respond to pings (even though they were taking 2000ms instead of 2ms),
so CM was still sending it calls, but the caller was just hearing dead
air.

Since then we've been watching it like a hawk.

If the SIP trunk is moved to its own RG, and the RL is updated so that
it now has two RGs in it, would that have mitigated what happened?

Thanks.