Figure 155: M7I Router Cooling System And Airflow; Figure 156: M10I Router Cooling System And Airflow - Juniper M Series Monitoring And Troubleshooting Manual

Figure 155: M7i Router Cooling System and Airflow

Related
Documentation
M10i Router Cooling System

Figure 156: M10i Router Cooling System and Airflow

M10i
Front of chassis
Fan tray
6" (15.2 cm)
for airflow
(recommended)
Related
Documentation
M20 Router Cooling System
Copyright © 2012, Juniper Networks, Inc.
Checklist for Monitoring the Cooling System on page 317
The M10i router cooling system consists of two fan trays, located along the left and right
side of the chassis that provide side-to-side cooling. The fan trays house eight fans that
draw room air into the chassis to maintain an acceptable operating temperature for the
Routing Engine, PICs, Compact Forwarding Engine Board (CFEB), and other components.
The fan trays connect directly to the router midplane. If a single fan fails, the remaining
fans continue to function indefinitely (see
Redundant fan tray
6" (15.2 cm)
for airflow
(recommended)
For proper airflow, the primary fan tray should be installed in slot
at the chassis from the rear) and must be installed for proper cooling at all times. The
redundant fan tray, if present, should be installed in slot
provides additional cooling and redundancy.
Checklist for Monitoring the Cooling System on page 317
The M20 router cooling system consists of the following components (see
page 322):
Chapter 11: Monitoring the Cooling System
Figure 156 on page
FAN TRA
Y 1 C-FE B 0
C-FE B 1
P/S 3
P/S 1
P/S 2
P/S 0
NOT E:
P/S 0 AND FAN TRA
P/S 1 MUS Y O
FOR NOR T BE PRE
MAL OPE
RAT ION. SEN T
Redundant fan tray Fan tray
321).
(the left slot looking
1
on the right. This fan tray
0
Figure 157 on
321