CHAPTER
Repair and Replacement 11-1
11
Repair and Replacement
This chapter describes periodic maintenance procedures, troubleshooting procedures, and the
replacement of major BPX switch components.
The chapter contains the following:
• Preventive Maintenance
• Troubleshooting the BPX switch
• Replacing Parts
Preventive Maintenance
Most monitoring and maintenance of the BPX switch is done via the BPX switch operating system
software. Preventive maintenance of the BPX switch hardware is minimal and requires only the
following:
1 Periodically check the node supply voltage and internal cabinet temperature with the dspasm
command. It should not exceed 50 C.
2 Periodically check the event log with the dsplog command.
3 Periodically check the network alarm status with the dspalms command.
Troubleshooting the BPX Switch
This section describes basic troubleshooting steps to be taken for some of the more obvious node
failures (refer to Table 11-1). This is not an exhaustive set of procedures, and does not take into
account any of the diagnostic or network tools available to troubleshoot the BPX switch. Refer to the
Cisco WAN Switching Command Reference for information on commands and command usage.
Caution Do not perform any disruptive tests or repairs to the BPX switch on your own. Before proceeding
with troubleshooting, call Customer Service so they can provide you with assistance in locating the fault and
provide repair information.
General Troubleshooting Procedures
The BPX switch runs self tests continuously to ensure proper function. When the node finds an error
condition that affects its operation, it downs the card or trunk affected. It then selects a standby card
or alternate trunk if one is available.
