Troubleshooting guide

BSR Troubleshooting Guide
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1. Check for bent pins on the backplane.
2. If there are no bent pins, replace the POS module with a new POS module, or try
inserting the POS module in a different slot.
If the POS module works in a different slot, the BSR 64000 backplane may be
defectivel
Handling Data Loss on SONET Link
Data loss can occur on a section, line, or path of a SONET link:
• A section may be between Customer Premises Equipment (CPE) and SONET
Service Provider Equipment (SPE).
• A line may be between a SONET SPE, regenerators and another SONET SPE.
• A path may be between a CPE, SONET SPE, regenerators and another SONET
SPE and CPE.
Data Loss Determination
Follow these steps to determine where data loss is occurring over the SONET link,
and to resolve problems with a specific section, line, or path:
1. Locate the SONET termination equipment.
2. Check the LEDs on each device. A red port LED on either device indicates a
Fault condition. Refer to the Resolving Fault LED Issues section of this chapter
for more information. If the LEDs on both SONET devices are green, and packet
loss is detected between the SONET terminating equipment, continue
troubleshooting the problem.
3. The B1 (bit 1), B2 (bit 2), and B3 (bit 3) SONET frame overhead identifies the
Bit Error Rate (BER) threshold crossing alarm associated with a different section,
line, or path.
To view b1-tca (bit 1 threshold crossing alarm), b2-tca (bit 2 threshold crossing
alarm), and b3-tca (bit 3 threshold crossing alarm) information, use the show
controllers pos command in POS Interface Configuration mode.