Motorola BSR 64000 Guía para resolver problemas descargar pdf (Pagina 131)

Troubleshooting SONET

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6. Check for a Path Remote Error Indication (P-REI) failure by viewing the Active

Defect field in the show controllers pos command output. A P-REI failure is

generated by the SONET device and sent out its transmit port when a failure is

detected on its receive port. A P-REI indicates a LOP failure condition, and

indicates high bit error rates coming from the transmitting (upstream) device.

Refer to the section Handling Data Loss on SONET Link for more information.

LOP Resolution

Follow these steps to resolve an LOP condition once you have isolated the cause or

problem area:

1. Check the fiber cabling for damage or improper use. For example, SONET cables

may be turned beyond their bending radius.

2. Ensure that both SONET terminal devices are operating at the same data rate. For

example, ensure that the SONET terminal devices are operating at either an OC3

or OC12 data rate.

3. Check for signal degradation.

4. Check fiber optic connectors for damage, and make sure they are clean.

Failed POS Module

A red fail LED indicates a POS module failure.

Perform one or more of the following tasks to try to re-enable the POS module:

1. Ensure that the POS module is firmly seated in the chassis.

2. Reinsert the POS module.

3. Replace the POS module.

4. Insert the POS module in another slot.

Fail LED Blinks and Lights Repeatedly

Follow these steps to resolve the POS module failure:

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Motorola BSR 64000 Guía para resolver problemas Pagina 131