Dedug SIP trunk from CM to CUBE

From TAC

The link below outlines how to enable detailed traces on CUCM cluster and collect them:
Set Up Cisco CallManager Traces for Cisco Technical Support:

Now this is the best bit of code i have seen in a long time! Enable SIP debugs, stores them in a txt file on the flash and when the error condition “503 Service Unavailable” happens do some show cmd and turn debugs off.

conf t
service timestamps debug datetime msec localtime
service timestamps log datetime msec localtime
service sequence-numbers
no logging queue-limit
logging buffered 12000000
no logging rate-limit
no logging console

event manager applet Capture_503
event syslog pattern "503 Service Unavailable"
action 0.1 syslog msg "503_Error_has been_Encountered"
action 1.0 cli command "ena"
action 1.4 cli command "show clock | append flash:503.txt"
action 2.0 cli command "show proc cpu sort | append flash:503.txt"
action 3.0 cli command "show log | append flash:503.txt"
action 4.0 cli command "show voice call sum | append flash:503.txt"
action 5.0 cli command "show voice call active voice br | append flash:503.txt"
action 6.0 cli command "un all"

clear log
debug ccsip mess
debug voip ccapi inout

once you encounter an error condition copy the file from flash to PC

copy flash tftp
"ip address of your tftp server"

About Alexis Katsavras

Working as Freelance Cisco Unified Communications Consultant in the UK.