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
Bouncing SS7 Links
Usually, mismatched signaling link codes (SLCs) or DPCs/OPCs between the Cisco PGW 2200
Softswitch and the far end cause this condition. To resolve a bouncing SS7 condition, 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 Verify that the SLC, OPC, and DPC provisioning settings match with the settings used on the far end.
To verify settings, enter the prov-rtrv MML command for the SS7 link, OPC, and DPC components, as
described in the “Retrieving Provisioning Data” section on page 3-69. Compare the values that are
retrieved with the settings used by the far end.
If the provisioning settings for the SLC, OPC, and DPC match the settings that are used on the far end,
proceed to Step 3. Otherwise, modify the settings to match the settings that are used on the far end. See
the “Invoking Dynamic Reconfiguration” section on page 3-66 for more information about modifying
the settings of a provisioned component. If that clears the problem, the procedure is complete.
Otherwise, proceed to Step 3.
Step 3 Ensure that the local MTP3 timer settings match the network defaults by following the instructions in
the “Verifying MTP3 Timers” section on page 6-108.
If the local MTP3 timer settings match the network defaults, proceed to Step 4. Otherwise, contact the
far-end to determine whether they can change timer settings to match your settings. If that clears the
problem, the procedure is complete. Otherwise, proceed to Step 4.
Step 4 View the system logs, as described in the “Viewing System Logs” section on page 6-90, looking for
excessive alignment error monitoring (AERM) logs. If large numbers of AERM logs are present, proceed
to Step 5.
If no AERM logs are present, proceed to Step 6.
Step 5 Determine why the link is not aligning properly by checking the alignment status on the Cisco ITP-L
associated with the affected link, as described in the “Verifying the Link Alignment Status” section on
page B-6.
If the condition clears, the procedure is complete. Otherwise, proceed to Step 6.
Step 6 Contact the Cisco TAC to analyze the problem further and to determine a solution. For more information
about contacting the Cisco TAC, see the “Obtaining Documentation and Submitting a Service Request”
section on page xviii.
Configuration Errors
If the SS7 DPC is fully associated, it can have the same SLTM/SLTA problems that were described in
the preceding section.
If the SS7 DPC is quasi-associated, the most common cause for failure is a route misconfiguration.
Review the route information between the Cisco PGW 2200 Softswitch and the DPC to ensure that the
APCs are valid, the route priorities are set correctly, and the route uses the appropriate linkset.