Cabletron Systems 9A000 Hardware Maintenance Procedures, Network Module Replacement, Overview

CHAPTER 5

Hardware Maintenance Procedures

This chapter discusses various hardware maintenance procedures for the Cabletron ATM switches. Items discussed include the following:

•Network Module Replacement

•Power Supply Replacement

•Fan Tray Replacement

•Switch Control Processor Replacement

•Switch Board Replacement

5.1Network Module Replacement

5.1.1Overview

The network modules in all Cabletron ATM switches are hot-swappable, meaning that they can be removed and replaced with the unit under power. Network modules should only be hot-swapped for purposes of replacing a failed unit. Therefore, they should be replaced with a network module of the same type, the same Series, and with the same number of ports. A network module’s type is the class to which the network module belongs (e.g., OC-3, E3, TAXI, etc.).

If a network module is removed and replaced by a network module of another type or by a network module with fewer ports, all configuration information for that network module’s slot will be deleted, and the new net- work module will be configured with the defaults for its type. For example, if a 4-port Series A OC-3c is replaced by a 4-port Series C OC-3c, the Series C network module will use the same configuration of the Series A network module. Any additional configurable variables will contain OC-3c defaults. If a 4-port OC-3c is replaced by a 4-port DS3, all configuration information for that slot will be deleted and the DS3 will be initialized with DS3 defaults. If a 6-port DS3 is replaced by a 2-port DS3, all configuration information for the slot will be deleted, and the new DS3 initialized with DS3 defaults. If a net- work module is placed into a previously vacant slot, it will be initialized into the default state appropriate to that type of network module.

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