Juniper QFX10016, Руководство по оборудованию

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Table 8: QFX10016-FAN Fan Tray Specifications
Specification Value
Height 36.6 in. (92.97 cm)
Width 6.6 in. (16.8 cm)
Depth 4.0 in. (10.2 cm) without handles, 5.3 in. (13.46 cm) with handles
Weight 19.8 lb. (8.98 kg)
Only remove one fan tray when replacing an existing fan tray while the switch is running. The switch
continues to operate for a limited time with a single operating fan tray without triggering a thermal
alarm.
CAUTION: To avoid a thermal alarm, do not remove both fan trays while the switch is
operating.
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.
Fan Tray Controller
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
show chassis fan command to
see the status of individual fans and fan speed. For example:
35