[cisco-voip] SIP Trunk Redundancy

[Mark Holloway]

Cisco Press has a SIP Trunking book coming out in January 2010.

It's really up to the ITSP to test and certify each IP PBX for their SIP network.  It's a painful process but if done correctly, it will work as expected and customers are happy. 


On Nov 23, 2009, at 5:49 PM, Thomas LeMay wrote:

> Hi, Mark,
>  
> Can you suggest any best business practices for the design and deployment of SIP trunking?  Can you point me to any good books on SIP design and deployment?
>  
> Thanks,
>  
> Tom
>  
> From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Mark Holloway
> Sent: Monday, November 23, 2009 7:21 PM
> To: Lelio Fulgenzi
> Cc: Cisco VoIPoE List
> Subject: Re: [cisco-voip] SIP Trunk Redundancy
>  
> SIP Trunking works great when designed and deployed correctly. 
>  
> On Nov 23, 2009, at 12:39 PM, Lelio Fulgenzi wrote:
> 
> 
> Every day, I think to myself, man, SIP isn't all it's cracked up to be......
> 
> OK, not _every_ day, but when I read posts like this I do.
> 
> Seems like there will be some "re-edumacating" necessary when moving to SIP.
> 
> 
> ---
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> "Bad grammar makes me [sic]" - Tshirt
> 
> 
> ----- Original Message -----
> From: "Chris Ward (chrward)" <chrward at cisco.com>
> To: "Ted Nugent" <tednugent73 at gmail.com>, "Cisco VoIPoE List" <cisco-voip at puck.nether.net>
> Sent: Monday, November 23, 2009 2:21:05 PM GMT -05:00 US/Canada Eastern
> Subject: Re: [cisco-voip] SIP Trunk Redundancy
> 
> You would need to look at the traces to verify, but it may just be the time it takes to failover. You probably need to mess with the SIP profiles and timers to get the trunks to failover in a timely manner. I think by default it may take 15+ seconds (depends on # of retires and time between retries) for a SIP trunk call to failover to the next member of a route group.
>  
> -Chris
>  
> From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Ted Nugent
> Sent: Monday, November 23, 2009 2:14 PM
> To: Cisco VoIPoE List
> Subject: [cisco-voip] SIP Trunk Redundancy
>  
> I'm working with a client that has 3 sites where the PRIs were replaced by SIP trunks. Everything appears to be running fine with the exception of outbound trunk redundancy. The appear to have just removed the PRIs from the existing RGs and replaced them with the SIP trunks. The problem is that if a SIP trunk goes down its not rerouting to the next trunk, they are just getting dead air. I'm assuming that this is similar to the issue seen with H323 trunks and why a gatekeeper would be needed for this but what are the options for SIP? I can probably get by with using Locations CAC for FO if the trunks fills but not sure about if it actually goes down and CUCM can determine that. CUCM 7.12 and no CUBE.
>  
>  
> 
> 
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