Wednesday 22 January 2014

Useful Debugs

There's a multitude of debugs on Cisco routers, below are some that I frequently find useful for VoIP troubleshooting:


CommandPurpose
debug ccsip messagesShows the SIP messages being sent & received
debug gatekeeper call 5Shows gatekeeper call processing, including bandwidth requests
debug gatekeeper main 5Shows gatekeeper address resolution, including zone/prefix matching
debug h225 asn1Shows H225 messages being sent & received
debug isdn q931Shows ISDN Q931 messages, including calling & called number
debug rasShows summary of H225 RAS messages being sent & received
debug voice ccapi individual 2Shows a summary of call setup messages regardless of protocol, including calling & called number
debug voip ipipgwShows the CUBE processing, such as when it needs to invoke a transcoder

Don’t forget to add voice iec syslog to your configuration too, this enables a lot of useful information to be logged.

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