Collecting Traces from CUCM

Hello this post is about how to collect traces for CUCM, it is focused in 10.5 version. We can check the signaling across the CUCM to check detailed logs from processed calls. These traces must be turn on before, after we finish it is recommended to turn off them.

Configure Traces

First, go to CUCM and log into Unified CM Serviceability.

Then go to Trace -> Configuration

Select your Communications Manager and CM Services -> Cisco CallManager (Active)

Check Trace On and set the Debug Trace Level to Detailed. Check the traces that you need and relevant to the problem. The most important is probably Enable SIP Call Processing Trace.

Make a Test Call

With all your traces enabled, make a call. Note the timestamps when you start and stop for that call so you can find the problem quickly in the traces.

Collect the Traces

CUCM traces are collected with the Real-Time Monitoring Tool(RTMT). You have to download this from Unified CM Administration -> Application -> Plugins.

Click Find then scroll down to the bottom and download Cisco Unified Real-Time Monitoring Tool – Windows

Install RTMT and launch it. Enter your CUCM IP Address. Click Accept if a certificate error appears. It will then prompt you to log-in.

Go to Trace & Log Central -> Collect Files

In the next window check Cisco CallManager under All Servers. Click Next.

You can just click Next on the System Services/Applications window that appears without selecting anything.

On the next screen choose the range when you made the test call. Start 10 minutes before and end 10 minutes late to ensure everything is downloaded.

Choose the Download File Directory (at this location your logs will be downloaded) and select Zip Files. Click Finish, the logs will begin downloading. Depending on how many traces were selected, the activity on the CUCM, and the time range. Wait until you see completed.