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This chapter describes the Catalyst 8540, a 13-slot, modular chassis, and provides an overview of the chassis components. The following sections describe the chassis components:
The chassis ships populated specifically to your order. Figure 1-1 shows an example of a fully populated Catalyst 8540 chassis.
The route processor contains most of the system memory components and the main system processor, which includes the network management processor for the system software. You can install up to two route processors in slots 4 and 8 of the chassis. The chassis supports fault tolerance by allowing a secondary (or redundant) route processor to take over if the primary route processor fails. This redundant route processor runs in standby mode. Figure 1-2 shows the route processor, which maintains and executes the management functions that control the chassis.
You can install up to three switch modules in slots 5 to 7 of the chassis. Two switch modules are required for operation. By default, switch modules 5 and 7 are primary and switch module 6 runs in standby. The third switch module provides redundancy for only one of the two active modules in the chassis. The standby switch module automatically becomes active in the event that you remove one of the switch modules from the system. To force the standby switch module to become active, use the redundancy preferred-switch-card-slots command. Figure 1-3 shows the switch module.
The Catalyst 8540 is a 13-slot, modular chassis with optional dual, fault-tolerant, load-sharing AC or DC power supplies. In the event of a failure of source power to one supply, or the failure of one power supply, the redundant power option ensures uninterrupted operation. Table A-1 lists system power specifications, including input voltage and operating frequency ranges. Before connecting each unit, note its power consumption rating in Table A-1.
Each power supply monitors its own output voltage and shuts down if it detects a critical condition within the power supply. The reporting functions retrieve and display the present values of measured parameters. If any of the monitored parameters exceed defined thresholds, the reporting functions display alarms on the console.
The power supply monitors its own internal temperature and voltages. It is either within tolerance (normal, 0 to 55ºC) or out of tolerance (alarm, > 55ºC). If an internal power supply temperature or voltage reaches the alarm level, the Output Fail LED may turn red and the power supply can shut down the system. Each power supply contains a power supply fan. Cool air enters the power supply from the front and exhausts at the rear. (See Figure 1-4 .)
The chassis fan assembly provides cooling air for the internal chassis components. The fans exhaust air from the left of the chassis. Fresh air enters from the right of the chassis. (See Figure 1-4 .)
Posted: Thu Sep 21 13:35:18 PDT 2000
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