Maintaining The Mx240 Fan Tray - Juniper MX240 Hardware Manual

Figure 82: Installing the Air Filter
SEE ALSO
Preventing Electrostatic Discharge Damage to an MX240 Router | 467
SEE ALSO
MX240 Cooling System Description | 44
Preventing Electrostatic Discharge Damage to an MX240 Router | 467

Maintaining the MX240 Fan Tray

Purpose
For optimum cooling, verify the condition of the fans.
Action
Monitor the status of the fans. A fan tray contains 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 and red alarm is triggered
when a fan tray is removed.
To display the status of the cooling system, issue the show chassis environment command. The output
is similar to the following:
user@host> show chassis environment
279