Cisco Unified Border Element (Enterprise) SIP Support Configuration Guide, Cisco IOS XE Release 3S
Configuring SIP 181 Call is Being Forwarded Message
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Configuring SIP 181 Call is Being Forwarded Message

Configuring SIP 181 Call is Being Forwarded Message

You can configure support for SIP 181 Call is Being Forwarded messages either globally or on a specific dial-peer. Use the block command in voice service SIP configuration mode to globally configure Cisco IOS voice gateways and Cisco UBEs to drop specified SIP provisional response messages. To configure settings for an individual dial peer, use the voice-class sip block command in dial peer voice configuration mode. Both globally and at the dial peer level, you can also use the sdp keyword to further control when the specified SIP message is dropped based on either the absence or presence of SDP information.

Additionally, you can use commands introduced for this feature to configure a Cisco UBE, either globally or at the dial peer level, to map specific received SIP provisional response messages to a different SIP provisional response message on the outgoing SIP dial peer. To do so, use the map resp-code command in voice service SIP configuration mode for global configuration or, to configure a specific dial peer, use the voice-class sip map resp-code in dial peer voice configuration mode.

This section contains the following tasks:

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for SIP 181 Call is Being Forwarded Message

Cisco Unified Border Element

Cisco IOS Release 15.0(1)XA or a later release must be installed and running on your Cisco Unified Border Element.

Cisco Unified Border Element (Enterprise)

  • Cisco IOS XE Release 3.1S or a later release must be installed and running on your Cisco ASR 1000 Series Router.

Configuring SIP 181 Call is Being Forwarded Message Globally

Perform this task to configure support for SIP 181 messages at a global level in SIP configuration (conf-serv-sip) mode.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    voice service voip

    4.    sip

    5.    block {180 | 181 | 183} [sdp {absent | present}]

    6.    exit


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Router> enable
     

    Enters privileged EXEC mode, or other security level set by a system administrator.

    • Enter your password if prompted.
     
    Step 2 configure terminal


    Example:
    Router# configure terminal
     

    Enters global configuration mode.

     
    Step 3 voice service voip


    Example:
    Router(config)# voice service voip
     

    Enters voice service VoIP configuration mode.

     
    Step 4 sip


    Example:
    Router(conf-voi-serv)# sip
     

    Enters SIP configuration mode.

     
    Step 5 block {180 | 181 | 183} [sdp {absent | present}]


    Example:
    Router(conf-serv-sip)# block 181 sdp present
     

    Configures support of SIP 181 messages globally so that messages are passed as is. The sdp keyword is optional and allows for dropping or passing of SIP 181 messages based on the presence or absence of SDP.

     
    Step 6 exit


    Example:
    Router(conf-serv-sip)# exit
     

    Exits the current mode.

     

    Configuring SIP 181 Call is Being Forwarded Message at the Dial-Peer Level

    Perform this task to configure support for SIP 181 messages at the dial-peer level, in dial peer voice configuration (config-dial-peer) mode.

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    dial-peer voice tag voip

      4.    voice-class sip block {180 | 181 | 183} [sdp {absent | present}]

      5.    exit


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 enable


      Example:
      Router> enable
       

      Enters privileged EXEC mode, or other security level set by a system administrator.

      • Enter your password if prompted.
       
      Step 2 configure terminal


      Example:
      Router# configure terminal
       

      Enters global configuration mode.

       
      Step 3 dial-peer voice tag voip


      Example:
      Router(config)# dial-peer voice 2 voip
       

      Enters dial peer VoIP configuration mode.

       
      Step 4 voice-class sip block {180 | 181 | 183} [sdp {absent | present}]


      Example:
      Router(config-dial-peer)# voice-class sip block 181 sdp present
       

      Configures support of SIP 181 messages on a specific dial peer so that messages are passed as is. The sdp keyword is optional and allows for dropping or passing of SIP 181 messages based on the presence or absence of SDP.

       
      Step 5 exit


      Example:
      Router(config-dial-peer)# exit
       

      Exits the current mode.

       

      Configuring Mapping of SIP Provisional Response Messages Globally

      Perform this task to configure mapping of specific received SIP provisional response messages at a global level in SIP configuration (conf-serv-sip) mode.

      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    voice service voip

        4.    sip

        5.    map resp-code 181 to 183

        6.    exit


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 enable


        Example:
        Router> enable
         

        Enters privileged EXEC mode, or other security level set by a system administrator.

        • Enter your password if prompted.
         
        Step 2 configure terminal


        Example:
        Router# configure terminal
         

        Enters global configuration mode.

         
        Step 3 voice service voip


        Example:
        Router(config)# voice service voip
         

        Enters voice service VoIP configuration mode.

         
        Step 4 sip


        Example:
        Router(conf-voi-serv)# sip
         

        Enters SIP configuration mode.

         
        Step 5 map resp-code 181 to 183


        Example:
        Router(conf-serv-sip)# map resp-code 181 to 183
         

        Enables mapping globally of received SIP messages of a specified message type to a different SIP message type.

         
        Step 6 exit


        Example:
        Router(conf-serv-sip)# exit
         

        Exits the current mode.

         

        Configuring Mapping of SIP Provisional Response Messages at the Dial-Peer Level

        Perform this task to configure mapping of received SIP provisional response messages at the dial-peer level, in dial peer voice configuration (config-dial-peer) mode.

        SUMMARY STEPS

          1.    enable

          2.    configure terminal

          3.    dial-peer voice tag voip

          4.    voice-class sip map resp-code 181 to 183

          5.    exit


        DETAILED STEPS
           Command or ActionPurpose
          Step 1 enable


          Example:
          Router> enable
           

          Enters privileged EXEC mode, or other security level set by a system administrator.

          • Enter your password if prompted.
           
          Step 2 configure terminal


          Example:
          Router# configure terminal
           

          Enters global configuration mode.

           
          Step 3 dial-peer voice tag voip


          Example:
          Router(config)# dial-peer voice 2 voip
           

          Enters dial peer VoIP configuration mode.

           
          Step 4 voice-class sip map resp-code 181 to 183


          Example:
          Router(config-dial-peer)# voice-class sip map resp-code 181 to 183
           

          Enables mapping of received SIP messages of a specified SIP message type on a specific dial peer to a different SIP message type.

           
          Step 5 exit


          Example:
          Router(config-dial-peer)# exit
           

          Exits the current mode.

           

          Feature Information for Configuring SIP 181 Call is Being Forwarded Message

          The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

          Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

          Feature History Table entry for the Cisco Unified Border Element.

          Table 1 Feature Information for SIP 181 Call is Being Forwarded Messages

          Feature Name

          Releases

          Feature Information

          SIP 181 Call is Being Forwarded Message

          12.2(13)T

          This feature allows users to configure support for SIP 181 Call is Being Forwarded messages either globally or on a specific dial-peer.

          This feature includes the following new or modified commands: block, map resp-code, voice-class sip block, voice-class sip map resp-code.

          Feature History Table entry for the Cisco Unified Border Element (Enterprise).

          Table 2 Feature Information for SIP 181 Call is Being Forwarded Messages

          Feature Name

          Releases

          Feature Information

          SIP 181 Call is Being Forwarded Message

          Cisco IOS XE Release 3.1S

          This feature allows users to configure support for SIP 181 Call is Being Forwarded messages either globally or on a specific dial-peer.

          This feature includes the following new or modified commands: block, map resp-code, voice-class sip block, voice-class sip map resp-code.