Call Admission Control (CAC) Enhancement

The call admission control (CAC) Enhancement feature enhances the CAC mechanism to update the maximum number of incoming or outgoing connections for a dial peer and the bandwidth based on the media flow.

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.

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.

Information About CAC Enhancement

The CAC enhancement accounts for local call and bandwidth based on the media flowing locally or to the WAN side. In NanoCUBE call flows, if the media flows locally in NanoCUBE then the call is accounted as a local call and the maximum connections and bandwidth values are not updated. The local calls on NanoCUBE do not increment the count of the maximum connections counter.

How to Configure CAC Enhancement

Configuring CAC Enhancement

Perform the following task to exempt local media calls and bandwidth from being updated on a dial peer.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    dial-peer voice tag voip

    4.    max-conn number exempt-local-media

    5.    session protocol sipv2

    6.    max-bandwidth value exempt-local-media

    7.    end


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
     Device> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.

     
    Step 2configure terminal


    Example:
    Device# configure terminal
     

    Enters global configuration mode.

     
    Step 3dial-peer voice tag voip


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

    Enters dial peer configuration mode.

     
    Step 4max-conn number exempt-local-media


    Example:
    Device(config-dial-peer)# max-conn 10 exempt-local-media
     

    Sets the maximum connections value for the dial peer to be not updated for local media calls.

     
    Step 5session protocol sipv2


    Example:
    Device(config-dial-peer)# session protocol sipv2
     

    Specifies the SIP Version 2 protocol for calls between local and remote routers using the packet network.

     
    Step 6max-bandwidth value exempt-local-media


    Example:
    Device(config-dial-peer)# max-bandwidth 20 exempt-local-media
     

    Sets the bandwidth threshold value to be not accounted for local media calls.

     
    Step 7end


    Example:
    Device(config-dial-peer)# end
     

    Returns to privileged EXEC mode.

     

    Verifying CAC Enhancement

    Perform this task to verify the configuration for the CAC enhancement. The show commands can be entered in any order.

    SUMMARY STEPS

      1.    enable

      2.    show dial-peer voice tag

      3.    show dial-peer voice tag


    DETAILED STEPS
      Step 1   enable

      Enables privileged EXEC mode.



      Example:
      Device> enable
      Step 2   show dial-peer voice tag

      Displays the information for voice dial peers.



      Example:
      Device# show dial-peer voice 302 include | bandwidth/maximum

         bandwidth/maximum = 0/200 Kilo bits per second
      Step 3   show dial-peer voice tag

      Displays the information for voice dial peers.



      Example:
      Device# show dial-peer voice 302 include | connections/maximum

         connections/maximum = connections/maximum = 0/2

      Configuration Examples for CAC Enhancement

      Example: Configuring the CAC Enhancement

      Device> enable
Device# configure terminal
Device(config)# dial-peer voice 2 voip
Device(config-dial-peer)# max-conn 10 exempt-local-media
Device(config-dial-peer)# session protocol sipv2
Device(config-dial-peer)# max-bandwidth 20 exempt-local-media
Device(config-dial-peer)# end

      Feature Information for CAC Enhancement

      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.
      Table 1 Feature Information for CAC Enhancement

      Feature Name

      Releases

      Feature Information

      Nano CUBE -- CAC Enhancement

      15.3(3)M

      The call admission control (CAC) Enhancement feature enhances the CAC mechanism to update the maximum number of incoming or outgoing connections for a dial peer and the bandwidth based on the media flow.