Juniper Networks M5 - Manual (Page 95)

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.
•
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
...
Maintain Hardware Components 75