Cisco OL-9420-01 - Manual
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Table of Contents:
- Page 2 – Cisco Unified IP Phone Initialization Process
- Page 3 – Cisco Unified CallManager Initialization Process; Self-Starting Processes
- Page 4 – Cisco Unified CallManager Registration Process
- Page 5 – Cisco Unified CallManager KeepAlive Process
- Page 9 – Troubleshooting Intercluster Cisco Unified IP Phone Calls; Sample Topology
- Page 10 – Failed Call Flow
B-1
Troubleshooting Guide for Cisco Unified CallManager Release 5.0(2)
OL-9420-01
A P P E N D I X
B
Case Study: Troubleshooting
Cisco Unified IP Phone Calls
This appendix contains two case studies:
•
Troubleshooting Intracluster Cisco Unified IP Phone Calls
•
Troubleshooting Intercluster Cisco Unified IP Phone Calls
Troubleshooting Intracluster Cisco Unified IP Phone Calls
The case study in this section discusses in detail the call flow between two Cisco Unified IP Phones
within a cluster, called an intracluster call. This case study also focuses on Cisco Unified CallManager
and Cisco Unified IP Phone initialization, registration, and keepalive processes. A detailed explanation
of an intracluster call flow follows the discussion. The explanation of the processes are explained using
the trace utilities and tools discussed in
Chapter 2, “Troubleshooting Tools.”
This section contains the following topics:
•
•
Cisco Unified IP Phone Initialization Process
•
Cisco Unified CallManager Initialization Process
•
•
Cisco Unified CallManager Registration Process
•
Cisco Unified CallManager KeepAlive Process
•
Cisco Unified CallManager Intracluster Call Flow Traces
Sample Topology
Given that you have two clusters named Cluster 1 and Cluster 2, the two Cisco Unified CallManagers in
Cluster 1 are called Unified CM3 and Unified CM4, while the two Cisco Unified CallManagers in
Cluster 2 are called Unified CM1 and Unified CM2.
The traces collected for this case study come from Unified CM1, which is located in Cluster 2, as shown
in
. The basis for the call flow are the two Cisco Unified IP Phones in Cluster 2. The IP
addresses of these two Cisco IP Phones are 172.16.70.230 (directory number 1000) and 172.16.70.231
(directory number 1001), respectively.
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Summary
B-2 Troubleshooting Guide for Cisco Unified CallManager Release 5.0(2) OL-9420-01 Appendix B Case Study: Troubleshooting Cisco Unified IP Phone Calls Troubleshooting Intracluster Cisco Unified IP Phone Calls Figure B-1 Sample Topology of Intracluster Cisco IP Phone-to-Cisco IP Phone Calls Cisco Unif...
B-3 Troubleshooting Guide for Cisco Unified CallManager Release 5.0(2) OL-9420-01 Appendix B Case Study: Troubleshooting Cisco Unified IP Phone Calls Troubleshooting Intracluster Cisco Unified IP Phone Calls Step 6 Once the Cisco Unified IP Phone connects and registers with Cisco Unified CallManager...
B-4 Troubleshooting Guide for Cisco Unified CallManager Release 5.0(2) OL-9420-01 Appendix B Case Study: Troubleshooting Cisco Unified IP Phone Calls Troubleshooting Intracluster Cisco Unified IP Phone Calls 16:02:51.031 CCM|UnicastBridgeManager - Started 16:02:51.031 CCM|MediaTerminationPointManage...
