[cisco-voip] loopback SIP trunk for failover calls

[Lelio Fulgenzi]

OK ... this just clicked. It doesn't have to be a SIP trunk. Can I create a non-gatekeeper Intercluster trunk loopback? 

----- Original Message -----

From: "Lelio Fulgenzi" <lelio at uoguelph.ca> 
To: "Cisco VOIP" <cisco-voip at puck.nether.net> 
Sent: Tuesday, April 29, 2014 1:53:34 PM 
Subject: loopback SIP trunk for failover calls 



We've built SIP trunks to our Nuance Speech Attendant servers, but have been told that in order to ensure failover in the event the servers are not responding, we need to build a loopback SIP trunk back to the CallManager servers so the call is handled. 

I'm not sure of all the SIP parameters we need, I'm gonna start with defaults, but heeding the old rule of "never allow a trunk to dial a number that can reach itself" I was going to do the following: 

    * create a SIP trunk with all cluster members as Destinations 
    * check "Run On All Active Unified CM Nodes" 
    * create a "SIP Loopback" partition and put only that partition into a "SIP Loopback" search space 
    * in the "SIP Loopback" partition, create a translation for each route pattern with the failover destination 


Any thoughts, will this give me what I need? 


Thanks, 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 


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