Debugging SIP

Basic SIP message flow

Make sure that asterisk full logging is enabled

> nano /etc/asterisk/logger.conf

In logger.conf make sure that "full => notice,warning,error,debug,verbose" is uncommented.

If the line is not initially uncommented, uncomment the line, and reload the asterisk logger service:

> sudo asterisk rx " logger reload"

To Debug a specific SIP extension: e.g. extension '1000'

>sudo asterisk -rx "sip set debug peer 1000"

The same command could be used to debug a particular trunk.

Viewing the SIP message sequence for extension '1000'

> tail -f /var/log/asterisk/full | grep "CSeq:"

You should be able to see the basic sip message sequence: e.g.

CSeq: 102 NOTIFY

CSeq: 1862292122 INVITE

CSeq: 1862292122 ACK

CSeq: 1862292123 INVITE

CSeq: 1862292123 ACK

CSeq: 102 BYE

CSeq: 102 OPTIONS

With sip debugging enabled and while a sip call is in progress:

> tail -f /var/log/asterisk/full | grep -i "Allow-Events:"

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