routing time for Route Group (CUCM 11x)

[bernards.lx]

Greetings, 

I've tried to search everywhere but found nothing about it.  

Let's say I have a Route Group with 2 SIP Trunks members, Top Down.

SIP-Trunk1(all ports)

SIP-Trunk2(all ports)

route, group, Unified Communications

what if the SIP-Trunk1 goes down... how long does it take for the call being routed to SIP-Trunk2? 

is there any available documentation for that? 

Thank you

[jason-mcgee]

If it is in the current route group members on the route group configuration and it is top down, there is no delay. It won't be searching for it, because it is already available. Same scenario would be if all members in SIP 1 are busy, there is no discernable delay before the first member is used on SIP 2

[TONY SMITH]

This issue is really how quickly CUCM will realise that the first trunk has gone down.  By default it will take a ridiculously long time, something like 30 seconds.   You need to look at timeouts and retries, so that it can "give up" on the failed trunk within a reasonable time. 

Also consider enabling keepalives (Options Ping) on the trunks so that when a trunk goes down CUCM stops even trying it until it comes back.  Otherwise those timeouts will apply to every call attempt as each has to fail on the first trunk before going onto the second.