Inbound voip dial-peer matching criterias - "From" IP of INVITE message

[pat.mar.paj]

Hi all,

I have some doubts about matching criterias in inbound voip dial-peers, specifically when I need to configure two different inbound voip dial-peers for receiving messages from different SIP servers.

I have the following configuration (summarized) in a voice gateway (not SBC):

voice class server-group 1

  ipv4 CUCMIP1 port 5060 preference 1
  ipv4 CUCMIP2 port 5060 preference 2

 !

voice class server-group 2
  ipv4 SBCIP1 port 5060 preference 1
  ipv4 SBCIP2 port 5060 preference 2

!

dial-peer voice 1000 voip
  translation-profile incoming IncomingCalllegHCS
  session protocol sipv2
  incoming called-number .T
  session server-group 1

 !

dial-peer voice 1100 voip
  session protocol sipv2
  incoming called-number .T
  session server-group 2
!

I am not sure if I can use the "session server-group" command to match the IP servers from which the SIP messages must be received, to associate the incoming call-leg to the correct dial-peer (take into account that I have to apply a translation-profile in dial-peer 1000, but I haven't in dial-peer 1100).

According some info resources, "session server-group" command is used in outbound dial-peers, and the correct way to match IP servers in an inbound dial-peer is creating a "voice class uri <tag>" and apply it to the dial-peer ("incoming uri via <tag>").

But according other resources, if I apply a voice class to an inbound voip dial-peer, I lost number information and I couldn't apply a translation-profile to change calling or called number. The basis for saying that is the matching priority criteria for an inbound voip dial-peer:

1. Match based on URI of an incoming INVITE message.

2. Match based on Called Number

3. Match based on Calling Number

4. Default Dial-Peer = 0

Which would be the correct configuration, really?

Thank you very much. Best regards.

[Daniele Giordano]

The correct way is to use 'voice class uri'.

See this post and test the dial-peer with voice translation rule. Should work.

https://community.cisco.com/t5/collaboration-voice-and-video/incoming-dial-peer-matching-on-ip-address-cube-tdm-sip/ta-p/3127349

I'va a question. Is the traffic from different IPs received on the same interface?

Regards.

[pat.mar.paj]

Thank you Daniele.

No, the SIP traffic from different IPs is received on different interfaces.

Best regards,

Patricia

[Daniele Giordano]

Have you try 'voice calss uri'?

Is it working?

Is this a voice gateway with TDM interfaces (isdn, fxs, fxo)?

Or is it a ip2ip gateway?

Have you configure 'allow-connections sip to sip?

In the past I used a trink in an ip2ip gateway to apply PBR and translation rule to a specific traffic received from a specific interface. I don't know if you can use this trick but you can study it on this link:

https://community.cisco.com/t5/voice-over-ip/solved-how-to-apply-a-pbr-to-an-rtp-flow-on-cube-two-default/td-p/2988008

Regards.