[cisco-voip] Load Balance between SIP dial-peers

Fri Dec 11 10:43:58 EST 2009

Last time I used SRV records on dial-peers you had to assign the dial-peer's session target as 'sip-server' and configure the domain in the sip-ua.  Otherwise, if you make the session target dns within the dial-peer it did not use SRV records and randomly selected one of the A records. 

On Dec 10, 2009, at 7:37 PM, Nick Matthews wrote:

> It should.  
> 
> The only factors in an outgoing dial peer are:
> 
> destination-pattern
> match length against destination pattern
> cor list restrictions
> if the sip options are up
> and some other conditionals (CAC, etc)
> 
> IP addresses are not part of the process.  It should be a random load balance by default, which means it's possible for two consecutive calls to go to the same place that could give that impression.
> 
> -nick
> 
> On Thu, Dec 10, 2009 at 7:41 PM, Eric Pedersen <eric.pedersen at sait.ca> wrote:
> I used DNS SRV records for sip targets.  They work nice because then you don’t need to duplicate dial peers for each sip target, as long as you’re ok with a dependence on DNS.
> 
>  
> When I did it, I set one record to have a higher precedence, so I don’t know what the behaviour is if multiple targets have the same preference – i.e. if IOS load balances or not.
> 
>  
> 
> From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Ali El Moussaoui
> Sent: December 9, 2009 23:53
> 
> 
> To: Hussam Ahmad
> Cc: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] Load Balance between SIP dial-peers
> 
>  
> Its one router connected to 2 different targets and i think what Mark mentioned is true.
> 
> On Wed, Dec 9, 2009 at 7:03 PM, Hussam Ahmad <hahmad at sigma-it.net> wrote:
> 
> OK, could you please describe the topology?
> 
> do you have two routers with two links in-between or one router connected to two routers?
> 
>  
> Thanks and best regards,
> 
>  
> 
> HUSSAM AHMAD
> 
> Cisco Instructor | Sigma IT – Saudi Arabia
> 
> <image001.png>
> 
> Olaya St., Akaria 3, Entrance 13, 5th Floor, Office 509 | Riyadh | KSA
> 
> Tel: +966-1-2150100
> 
> Fax: +966-1-2151090
> 
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> 
> Email: hahmad at sigma-it.net
> 
> Website: www.sigma-it.net
> 
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>  
>  
> From: Mark Holloway [mailto:mh at markholloway.com] 
> Sent: Wednesday, December 09, 2009 7:57 PM
> To: Hussam Ahmad
> Cc: 'Ali El Moussaoui'; cisco-voip at puck.nether.net
> 
> 
> Subject: Re: [cisco-voip] Load Balance between SIP dial-peers
> 
>  
> Are you sure about that?  The expected behavior when creating two dial peers with identical destination patterns but different session targets is the lowest numbered dial peer is always used first and if the session target is not available the next dial peer is used.  Although this does provided redundancy it's not load balancing.
> 
>  
> On Dec 9, 2009, at 1:46 AM, Hussam Ahmad wrote:
> 
>  
> Configure the dial-peers without any preference and it will work as you want if the destination-pattern is the same.
> 
> Make it and use debug voice dial-peer in to verify it.
> 
>  
> Waiting for your reply.
> 
>  
> Thanks and best regards,
> 
>  
> 
> HUSSAM AHMAD
> 
>  
>  
>  
> From: Ali El Moussaoui [mailto:mousawi.ali at gmail.com] 
> Sent: Wednesday, December 09, 2009 11:43 AM
> To: Hussam Ahmad
> Cc: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] Load Balance between SIP dial-peers
> 
>  
> they have different session targets
> 
> On Wed, Dec 9, 2009 at 10:21 AM, Hussam Ahmad <hahmad at sigma-it.net> wrote:
> 
> You can but why do you need it, because how the first dial-peer will go down.
> 
>  
> Thanks and best regards,
> 
>  
> 
> HUSSAM AHMAD
> 
> Cisco Instructor | Sigma IT – Saudi Arabia
> 
> <image001.png>
> 
> Olaya St., Akaria 3, Entrance 13, 5th Floor, Office 509 | Riyadh | KSA
> 
> Tel: +966-1-2150100
> 
> Fax: +966-1-2151090
> 
> Mobile: +966-55-3266244
> 
> Email: hahmad at sigma-it.net
> 
> Website: www.sigma-it.net
> 
> ------------------------------------------------------------------------------------------------------
> 
> This e-mail communication and any attachments thereto contain information which is confidential and are intended only for the use of the individuals or entities named above. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution or the taking any action in reliance on the contents of these documents is strictly prohibited and may be illegal. Please notify us of your receipt of this e-mail in error and delete the e-mail and any copies of it
> 
>  
>  
> From: Ali El Moussaoui [mailto:mousawi.ali at gmail.com] 
> Sent: Wednesday, December 09, 2009 11:18 AM
> To: cisco-voip at puck.nether.net
> Subject: [cisco-voip] Load Balance between SIP dial-peers
> 
>  
> Hello Guys,
> 
> Is it possible to Load balance between 2 sip dial-peers ?
> 
> Ali
> 
>  
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