Troubleshooting guide

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Cisco PGW 2200 Softswitch Release 9.8 Operations, Maintenance, and Troubleshooting Guide
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Chapter 6 Troubleshooting the Cisco PGW 2200 Softswitch Platform
Resolving SS7 Network Related Problems
The following sections describe signaling channel problems:
• SS7 Link is Out-of-Service, page 6-96
• SS7 Load Sharing Malfunction, page 6-97
• Physical Layer Failures, page 6-98
• Configuration Errors, page 6-98
• Supporting Entity Failures, page 6-99
• Incomplete Signaling, page 6-99
• Changing Service States, page 6-99
SS7 Link is Out-of-Service
If an SS7 link is out-of-service on your system, perform the following steps:
Step 1 If you have not already collected system data, refer to the method that is described in the “Collecting
System Data for Cisco TAC” section on page 6-93.
Step 2 Change the service state of the SS7 link to in-service, as described in the “Setting the Service State of a
C7/SS7 Link or Linkset” section on page 6-105.
If the SS7 link returns to service, the procedure is complete. Otherwise, proceed to Step 3.
Step 3 Verify that MTP1 is working correctly on the affected Cisco ITP-L, as described in the “Identifying
MTP1 Communication Problems” section on page B-12.
If MTP1 is working correctly on the affected Cisco ITP-L, proceed to Step 4. Otherwise, correct the
MTP1 problems according to instructions in the “Resolving MTP1 Communication Problems” section
on page B-12.
Repeat Step 2. If the link returns to service, the procedure is complete. Otherwise, proceed to Step 7.
Step 4 Search for excessive SUREM/AERM errors and link failure messages in the active system log file, as
described in the “Viewing System Logs” section on page 6-90.
If MTP2 is working correctly on the Cisco PGW 2200 Softswitch, proceed to Step 5. Otherwise, correct
the MTP2 problems according to instructions in the “Resolving MTP2 Communication Problems”
section on page B-13.
Repeat Step 1. If the link returns to service, the procedure is complete. Otherwise, proceed to Step 5.
Step 5 Verify that MTP2 is working correctly on the affected Cisco ITP-L, as described in the “Identifying
MTP2 Communication Problems” section on page B-13.
If MTP2 is working correctly on the affected Cisco ITP-L, proceed to Step 6. Otherwise, correct the
MTP2 problems according to instructions in the “Resolving MTP2 Communication Problems” section
on page B-13.
Repeat Step 1. If the link returns to service, the procedure is complete. Otherwise, proceed to Step 6.
Step 6 Troubleshoot the SS7 link by following the instructions in the “Troubleshooting SS7 Link Problems”
section on page B-5.
If you do not find any problems, proceed to Step 7. Otherwise, repeat Step 2. If the link returns to
service, the procedure is complete. Otherwise, proceed to Step 7.