Fan Tray Controller; Cooling System Components And Descriptions - Juniper QFX10016 Hardware Manual

Fan Tray Controller

Copyright © 2017, Juniper Networks, Inc.
CAUTION: The chassis will shut down if a thermal alarm is raised for more
than three minutes.
The internal fan Control Board in each fan tray contains the LEDs for the associated fan
tray controllers and the LEDs for the three SIBs directly behind the fan tray.
The two fan tray controllers provide the control logic and power to hot-insert and
hot-remove a fan tray. The fans in each fan tray are numbered 0 through 20.
The system continually monitors the temperature of critical parts across the chassis and
adjusts the chassis fan speed according to the temperature.
Software controls the fan speed. Under normal operating conditions, the fans in the fan
tray run at less than full speed. If one fan tray controller fails or appears missing (such
as when a SIB is being replaced) the other fan tray controller sets the fans to full speed.
This allows the switch to continue to operate normally as long as the remaining fans cool
the chassis sufficiently. Use the
fans and fan speed. For example:
user@device> show chassis fan
Item
Fan Tray 0 Fan 0
Fan Tray 0 Fan 1
Fan Tray 0 Fan 2
Fan Tray 0 Fan 3
Fan Tray 0 Fan 4
Fan Tray 0 Fan 5
Fan Tray 0 Fan 6
Fan Tray 0 Fan 7
Fan Tray 0 Fan 8
Fan Tray 0 Fan 9
Fan Tray 0 Fan 10
Fan Tray 0 Fan 11
Fan Tray 0 Fan 12
Fan Tray 0 Fan 13
Fan Tray 0 Fan 14
Fan Tray 0 Fan 15
Fan Tray 0 Fan 16
Fan Tray 0 Fan 17
Fan Tray 0 Fan 18
Fan Tray 0 Fan 19
Fan Tray 0 Fan 20
Fan Tray 1 Fan 0
Fan Tray 1 Fan 1
Fan Tray 1 Fan 2
Fan Tray 1 Fan 3
Fan Tray 1 Fan 4
Fan Tray 1 Fan 5
Fan Tray 1 Fan 6
Fan Tray 1 Fan 7
Fan Tray 1 Fan 8
Fan Tray 1 Fan 9
Fan Tray 1 Fan 10
Chapter 4: Cooling System Components and Descriptions
command to see the status of individual
show chassis fan
Status RPM
OK 4500
OK 4650
OK 4650
OK 4800
OK 4650
OK 4650
OK 4650
OK 4500
OK 4500
OK 4650
OK 4650
OK 4500
OK 4500
OK 4500
OK 4650
OK 4350
OK 4500
OK 4500
OK 4350
OK 4500
OK 4500
OK 4500
OK 4650
OK 4500
OK 4500
OK 4650
OK 4650
OK 4650
OK 4500
OK 4500
OK 4650
OK 4500
Measurement
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
Spinning at normal speed
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