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Troubleshooting SONET

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Introduction

This chapter describes how to troubleshoot the Packet Over SONET (POS) access

module. When SONET network problems occur, the major failure conditions and

their associated alarm indicators occur.

The next sections describe how to respond to the following:

• Resolving Fault LED Issues

• Failed POS Module

• Handling Data Loss on SONET Link

Resolving Fault LED Issues

If the SONET port fault LED on the POS module is red, the port is not operational

and a loss of signal (LOS), loss of frame (LOF), and or loss of pointer (LOP)

condition exists.

LOS Determination

When a LOS condition occurs, follow these steps to resolve the LOS condition on a

POS module port:

1. Locate the SONET termination equipment.

2. To view the status of the SONET link, use the show controllers pos command in

Privileged EXEC mode, as shown in the following example:

BSR64000#show controllers pos <slot/port>

If the SONET link is down, the message

pos <slot>/<port> is down

appears.

3. View the Active Alarm field in the show controllers pos command output to

determine if there is an LOS failure on the POS module port.

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Motorola BSR 64000 Guía para resolver problemas Pagina 127