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Table Of Contents
13.2 Initial Troubleshooting Checklist
13.3 Troubleshooting PSM Interface Problems
13.3.1 Wdmsplit Interface Down
13.3.2 Wdmsplit Interface Power Level Indicates Loss of Light
13.3.3 Wdmsplit Interface Receives Light But End Wave Interface Shows Loss of Light
13.3.4 Wdm Interface Loses Topology Neighbor Learning Via CDP
13.3.5 Automatic CDP Learning Is Not Enabled on Wdmsplit Interface
Troubleshooting PSM Problems
This chapter describes how to troubleshoot PSM problems. This chapter includes the following sections:
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Overview
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13.1 Overview
The PSM (protection switch module) provides trunk fiber protection for Cisco ONS 15530 systems configured in point-to-point topologies. The PSM sends the signal from an OADM module, a transponder line card, or an ITU trunk card to both the west and east directions. It receives both the west and east signals and selects one to send to the OADM module, the transponder line card, or ITU trunk card. When a trunk fiber cut occurs on the active path, the PSM switches the received signal to the standby path. The PSM can protect up to 32 data channels and the OSC.
The PSM also has an optical monitor port for testing the west and east receive signals. This port samples one percent of the receive signals that can be monitored with an optical power meter.
13.2 Initial Troubleshooting Checklist
Follow this initial checklist before proceeding with the troubleshooting procedures:
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13.3 Troubleshooting PSM Interface Problems
This section contains troubleshooting procedures for PSM interface problems.
13.3.1 Wdmsplit Interface Down
Symptom The wdmsplit interface is down.
Table 13-1 describes the potential causes of the symptom and the solutions.
13.3.2 Wdmsplit Interface Power Level Indicates Loss of Light
Symptom The wdmsplit interface is down and shows Loss of Light.
Table 13-2 describes the potential causes of the symptom and the solutions.
13.3.3 Wdmsplit Interface Receives Light But End Wave Interface Shows Loss of Light
Symptom The wdmsplit interface receives light but the end wave interface shows Loss of Light.
Table 13-3 describes the potential causes of the symptom and the solutions.
13.3.4 Wdm Interface Loses Topology Neighbor Learning Via CDP
Symptom The wdm interface loses topology neighbor learning through CDP after the patch between the wdmrelay and wdm interfaces is configured.
Table 13-4 describes the potential cause of the symptom and the solution.
13.3.5 Automatic CDP Learning Is Not Enabled on Wdmsplit Interface
Symptom Automatic CDP learning is not enabled on the wdmsplit interfaces after a patch between the wdmrelay and wdm interfaces is configured.
Table 13-5 describes the potential cause of the symptom and the solution.
Posted: Mon Apr 30 12:11:37 PDT 2007
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