This document covers the overview of SIP debugging commands which are helpful while examining the status of SIP components and troubleshooting.


SIP debugging overview

debug ccsip: This has various options

Feature Design of SIP Debug Output Filtering Support

Prior to the SIP Debug Output Filtering Support feature, debugging and troubleshooting on the VoIP gateway was made more challenging by the extensive amounts of raw data generated by debug output.

This feature allows the debug output for a SIP call to be filtered according to a variety of criteria. The SIP Debug Output Filtering Support feature provides a generic call filtering mechanism that does the following:

  • Allows you to define a set of matching conditions for filtering calls.
  • Identifies the desired calls based on the configured matching conditions inside VoIP gateways.
  • Coordinates the filtering effort on traced calls between multiple modules inside VoIP gateways.
  • Displays the debugging trace for calls that match the specified conditions.

SIP Debug Commands that Support Output Filtering

Configuring Call Filters

This task configures the conditions for filtering SIP calls.


  1. enable
  2. configure terminal
  3. call filter match-list number voice
  4. incoming calling-number string
  5. incoming called-number string
  6. incoming signaling {local | remote} ipv4 ip-address
  7. incoming media {local | remote} ipv4 ip-address
  8. incoming dialpeer tag
  9. outgoing calling-number string
  10. outgoing called-number string
  11. outgoing signaling {local | remote} ipv4 ip-address
  12. outgoing media {local | remote} ipv4 ip-address
  13. outgoing dialpeer tag
  14. end



Enabling SIP Debug Output Filtering: Example