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Managing the Switch
Fan1(sys_fan1)
Fan2(sys_fan2)
Fan3(sys_fan3)
Fan_in_PS1
Fan_in_PS2
Fan_in_PS3
Fan_in_PS4
Fan_in_PS5
Fan_in_PS6
Fan_in_PS7
Fan_in_PS8
--More--2017 Mar 15 01:45:40 switch-m3100scale %$ VDC-1 %$ %PLATFORM-1-PFM_ALERT:
FAN_BAD: fan1
Fan Zone Speed %(Hex): Zone 1: 100.00(0xff)
switch#
• The fan tray is removed for replacement—The fan tray is designed to be removed and replaced while a
switch is operating, without presenting an electrical hazard or damage to the switch. Starting from Cisco
NX-OS Release 7.2(0)D1(1), use the hardware fan-tray maintenance-mode [long | medium | short]
command to put the switch in fan tray maintenance mode to prepare for fan tray removal and replacement.
For more information, see
as the switch air-inlet temperature does not exceed 86° Fahrenheit (30° C). If the temperature exceeds
86° Fahrenheit (30° C), the switch will shut down in 3 minutes.
• If you remove more than one fan tray at a time, the switch can operate up to three minutes before shutting
down. To prevent a shutdown, remove only one fan tray at a time.
Caution
If one or more fans fail within a fan tray, the Fan Status LED turns red. A fan failure could lead to temperature
alarms if not corrected immediately.
The fan status is continuously monitored by the software. In case of a fan failure, the following actions occur:
OL-30452-01.
N77-C7710-FAN-2
N77-C7710-FAN-2
N77-C7710-FAN-2
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Replacing a Fan
Note
The switch will shut down if a mix of Gen 1 (N77-C7710-FAN) and Gen 2
(N77-C7710-FAN-2) fan trays are present in the same switch for more than 21600
seconds (6 hours). The syslog message
"PLATFORM-0-FAN_MISMATCH_TIME: Mismatch of Fan modules. Both
Gen1 and Gen2 fans are present in the fantray for <number> seconds" will be
displayed at regular intervals when both Gen 1 and Gen 2 fan trays are present
in the same switch.
Note
• We recommend that you do not remove more than one fan tray at a time.
• When a fan fails or when you remove a fan tray, the remaining operating
fans speed up to compensate for the loss of fans. This can increase the noise
made by the fan trays until you replace the missing fan tray or replace the
defective fan tray.
• When replacing a failed fan tray in a running system, be sure to promptly
replace the fan tray.
Cisco Nexus 7710 Switch Site Preparation and Hardware Installation Guide
1.0
Failure(Failed Fanlets: 3 4 )
1.0
Ok
1.0
Ok
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Ok
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Ok
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Ok
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Ok
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Shutdown
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Shutdown
--
Ok
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Ok
Tray.You have up to 72 hours to replace a fan tray as long
Overview of Fan Trays
83
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