•
Troubleshooting the M7i Power System When the LEDs on All M7i Power Supplies Are
Blinking or Off on page 81
Maintaining the M7i Cooling System
Purpose
For optimum cooling, verify the condition of the fans.
Action
The router has a single fan tray that installs into the back of the chassis, as shown in
Figure 2 on page 6.
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 in the fan tray:
user@host>
show chassis environment
Class Item Status Measurement
Power Power Supply 0 OK
Power Supply 1 OK
Temp Intake OK 24 degrees C / 75 degrees F
PICs OK 27 degrees C / 80 degrees F
Power Supplies OK 27 degrees C / 80 degrees F
CFEB Intake OK 27 degrees C / 80 degrees F
CFEB Exhaust OK 33 degrees C / 91 degrees F
Routing Engine OK 26 degrees C / 78 degrees F
Fans Left Fan Tray Present
Left Tray front fan OK Spinning at normal speed
Left Tray second fan OK Spinning at normal speed
Left Tray third fan OK Spinning at normal speed
Left Tray fourth fan OK Spinning at normal speed
For further description of the output from the command, see the
Junos OS System Basics
and Services Command Reference
.
Related
Documentation
•
M7i Cooling System Overview on page 24
•
Replacing the M7i Fan Tray on page 117
Copyright © 2010, Juniper Networks, Inc.
74
M7i Multiservice Edge Router Hardware Guide
All manuals and user guides at all-guides.com