Juniper Networks M5, M10 manual Maintain Hardware Components, Routine Maintenance Procedures

Chapter 9

Maintain Hardware Components

This chapter describes how to maintain hardware components installed in the router. For information about returning a part to Juniper Networks for repair or replacement, see “Return the Router or Its Components” on page 163.

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Routine Maintenance Procedures on page 75

Maintain the Fan Tray on page 75

Maintain Packet Forwarding Engine Components on page 76

Maintain the Power Supplies on page 78

Maintain the Routing Engine on page 79

Routine Maintenance Procedures

For optimum router performance, perform the following preventive maintenance procedures on a regular basis:

•Inspect the installation site for potential problems caused by moisture, loose wires or cables, and excessive dust. Make sure that airflow around the router is unobstructed.

•Check the LEDs on the craft interface and on hardware components. See “Craft Interface” on page 14.

Maintain the Fan Tray

The fan tray installs into the rear of the chassis, as shown in Figure 3. To check the status of the fans in the fan tray, issue the show chassis environment command. The output includes an entry for each fan, as shown in this example:

user@host> show chassis environment

Class Item	Status	Measurement
...
Fans Left Fan 1	OK	Spinning at normal speed
Left Fan 2	OK	Spinning at normal speed
Left Fan 3	OK	Spinning at normal speed
Left Fan 4	OK	Spinning at normal speed
...

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