Maintaining The T320 Fan Trays; Maintaining The T320 Host Subsystem - Juniper Core Router T Series Hardware Manual

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Maintaining the T320 Fan Trays

Purpose
Action
Related
Documentation

Maintaining the T320 Host Subsystem

Purpose
Copyright © 2018, Juniper Networks, Inc.
T320 Cooling System Description on page 25
T320 Clearance Requirements for Airflow and Hardware Maintenance on page 91
Replacing a T320 Air Filter on page 193
For optimum cooling, verify the condition of the fans.
On a regular basis:
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.
To display the status of the fans, issue the
output is similar to the following:
user@host> show chassis environment
Class Item
...
Fans Top Left Front fan
Top Left Middle fan
Top Left Rear fan
Top Right Front fan
Top Right Middle fan
Top Right Rear fan
Bottom Left Front fan
Bottom Left Middle fan
Bottom Left Rear fan
Bottom Right Front fan
Bottom Right Middle fan OK
Bottom Right Rear fan
Fourth Blower from top
Bottom Blower
Middle Blower
Top Blower
Second Blower from top
...
T320 Cooling System Description on page 25
Troubleshooting the T320 Cooling System on page 297
Replacing a T320 Fan Tray on page 199
For optimum router performance, verify the condition of the host subsystem. The router
can have one or two host subsystems. Each host subsystem consists of a Routing Engine
and an adjacent control board.
Chapter 31: Maintaining Components
show chassis environment
Status Measurement
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
OK Spinning at normal speed
command. The
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