The following information will help you how to perform a basic call control analysis for a Telepresence call between 2 CTS Endpoints (1 single screen each), in this call we have 1 CTS 500 and 1 CTS-1000 system and no ts4.local (Presentation codec).
Versions:
CUCM 7.1.3.32900-4 Single server
CTS 1.6.4
- Now where your devices are registered.
Each Cisco CallManager log traces files locally. If a phone or gateway is registered to a particular CallManager, then the call is processed on that CallManager if the call is initiated there. You must capture traces on that Cisco CallManager in order to debug a problem. A common mistake is to have devices register on a Subscriber, but capture traces on the Publisher. These trace files are nearly empty (and most definitely do not have the call in them). Another common problem is to have Device 1 registered to Cisco CallManager 1 and Device 2 registered to Cisco CallManager 2. If Device1 calls Device 2, the call trace is in Cisco CallManager 1; if Device 2 calls Device1, the trace is in Cisco CallManager 2. If you troubleshoot a two-way calling issue, you need both traces from both Cisco CallManagers in order to get the full picture.
- Include DNs (phone numbers) or IP addresses (if gateways) for all devices involved in the problem.
This enables the Technical Support engineer to quickly locate the phones and other devices involved in the problem calls.
- Know the approximate time of the problem in the traces.
Multiple calls are probably made, so it helps to know the approximate time of the call that Cisco Technical Support needs to focus on.
Once you have downloaded both CUCM SDI/SDL detailed traces and both CTS traces, its time to start the analysis
Call from 3004 to 3006 around 15:45 PST time
Get the files from this location and look for the word:
+++++DEBUG+++++
You will find details in CUCM SDI and CTS traces (CCA, CMR, OSD and TSPS) for each call
What to check?
CTS point to point
Use CTS SYSOP logs
Check CCA logs (SIP messages are included in CCA in human readable timestamps)
Check SIP logs (Epoch time)
Check CMA
Check CMR
If Security is configured check:
- SECD
- KeyExchange
- SRTP
Check CUCM Configuration/Infraestructure (i.e. BEA, SBCs, etc)
Check CUCM Traces SDI/SDL traces
Troubleshooting
•Verify TelePresence SW Compatibility matrix
•From CTS CLI, verify Calling Services are up
•Verify System status in CTS GUI
•Verify system is registered
•Verify Region Bandwidth in CUCM (Check Video and Audio BW)
•Verify Location
•Verify CSS (Calling Search Space (Use Dial Number Analyzer)
•Check Route Patterns
•Check packet flow
•Use sniffer capture (Span port is recommended)
No comments:
Post a Comment