CUBE-SIP trunks

[Bekzod Fakhriddinov]

Hi guys,  if SIP Carrier provided plan to install 3 sip trunk to 1 site where I have 1 CUBE and CUCM , does this mean that I will just have 3 different dial-peers with 3 different IPs of Carrier ? 

If yes, how can I separate those dial-peers ?

thank you 

[R0g22]

You can make use of multi-tenant for that purpose. Read on -
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/cube/configuration/cube-book/voi-cube-multi-tenants.pdf

[Bekzod Fakhriddinov]

what about my first question is it true or not ?

[R0g22]

Yes to your question. That document should answer all your questions.

[Bekzod Fakhriddinov]

I think i don't need multi-tenant configuration because we will use those 3 sip trunks for 1 company only. Is this correct ? 

1 sip tg is active as backup go to backup switches of the Carrier, so if I create dial-peer 9 for active, then 92 and 93 for backup with different IPs it should work. Right ?   

[R0g22]

Multi-Tenant is for multiple SIP trunks terminating on a single CUBE like you mentioned in your post. If your ITSP requires trunk registration, you would need to use multi-tenant. Read the doc please to understand what is it used for.

I did not get your second question. Can you re-iterate please ?

[Bekzod Fakhriddinov]

Looks at this  document:

https://www.cisco.com/c/dam/en/us/solutions/collateral/enterprise/interoperability-portal/ucm-centurylink-sip-trunks-unified-border-element.pdf

They programmed 2 sip trunks by using different dial-peers BUT not multi-tenant feature . 

So I think I can do same thing with 3 sip trunks.

[R0g22]

That document is out of scope wrt your question.
1. It is for a CUBE HA setup.
2. The SIP Trunks are not being configured for registration. Look at the "sip-ua" section.

Like I said, if your ITSP requires registration or does proxy authentication differently, you will have to use the multi-tenant feature to get everything working correctly. If your ITSP does not need registration/authentication, you can get away with a single dial-peer if you need it to be very brief and use "voice class server group" -

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/voice/dialpeer/configuration/xe-3s/vd-xe-3s-book/multiple-server-groups.html

[Bekzod Fakhriddinov]

ITSP doesn't require registration or proxy auth. So I can have 3 dialpeers with 3 IP of ITSP or voice class server group . 

Thank you 

[R0g22 · Accepted solution]

Yes you can.

[Chris Deren]

First question would be why would you need 3 separate SIP trunk from the same carrier at the same location?

[Bekzod Fakhriddinov]

we connect to 1 sip carrier, kinda their cloud, they have 3 or 4 switches in LA, NY, somewhere else , and they proposed this plan for redundancy. So I was thinking if i set up 3 dial-peers with diff preferences and diff carrier ip's then that will be considered as 3 sip trunks .

Never had experience with multipple sip trunks on 1 cube, so i was confused a little bit when i saw their proposal and trying to figure it out myself.   

[Chris Deren]

So, one SIP trunk with multiple SBCs.

The easiest way to handle it assuming you are on IOS version supporting this feature is to use

"voice class server-group" feature where you can define all of the destinations and apply to one dial-peer, alternatively you can use the old school method with 3 dial-peers with different preferences.

[Bekzod Fakhriddinov]

no, 1 cube and 3 sip trunks to the same sip carrier .