Maintaining The Mx2020 Air Baffle; Maintaining The Mx2020 Fan Trays - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide

Maintaining the MX2020 Air Baffle

Purpose
Action

Maintaining the MX2020 Fan Trays

Purpose
Action
152
For optimum cooling, verify the condition of the air baffle. Redirect the exhaust air to the
desired direction to dissipate air away from the router.
On a regular basis, check the air baffle and adjust accordingly to redirect exhaust air.
For optimum cooling, verify the condition of the fans.
Monitor the status of the fans. The fan trays each contain multiple fans that work in
unison to cool the router components. If one fan fails, the host subsystem adjusts the
speed of the remaining fans to maintain proper cooling. A red alarm is triggered when
a fan fails, and a yellow alarm is triggered when a fan tray is removed. During normal
operation, the fans in each fan tray function at normal speed.
To display the status of the cooling system, issue the
command,
show chassis environment monitored
temperature-thresholds
For the fan trays, the output for the
the following:
user@host> show chassis environment
Class Item
Temp PSM 0
PSM 1
PSM 2
PSM 3
PSM 4
PSM 5
PSM 6
PSM 7
PSM 8
PSM 9
PSM 10
PSM 11
PSM 12
PSM 13
PSM 14
PSM 15
PSM 16
PSM 17
PDM 0
PDM 1
PDM 2
PDM 3
CB 0 IntakeA-Zone0
CB 0 IntakeB-Zone1
CB 0 IntakeC-Zone0
CB 0 ExhaustA-Zone0
CB 0 ExhaustB-Zone1
CB 0 TCBC-Zone0
CB 1 IntakeA-Zone0
command,
command, or show chassis fan
show chassis environment
Status
Absent
Absent
Absent
Absent
OK
OK
OK
OK
OK
Absent
Absent
Absent
Absent
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
show chassis environment
show chassis
command.
command is similar to
Measurement
34 degrees C / 93 degrees F
31 degrees C / 87 degrees F
30 degrees C / 86 degrees F
30 degrees C / 86 degrees F
31 degrees C / 87 degrees F
32 degrees C / 89 degrees F
31 degrees C / 87 degrees F
30 degrees C / 86 degrees F
30 degrees C / 86 degrees F
30 degrees C / 86 degrees F
25 degrees C / 77 degrees F
29 degrees C / 84 degrees F
28 degrees C / 82 degrees F
27 degrees C / 80 degrees F
28 degrees C / 82 degrees F
32 degrees C / 89 degrees F
30 degrees C / 86 degrees F
Copyright © 2013, Juniper Networks, Inc.