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Installing or Replacing Modules, Fan Trays, and Power Supplies
to prepare for fan tray removal. For more information about the hardware fan-tray maintenance-mode, see
Cisco Nexus 7000 Series NX-OS System Management Command
The fan tray maintenance mode will be cancelled in the following cases:
• If a temperature alarm is present.
• Hot-inlet temperature (Sup inlet temperature >= 30 degrees Celsius)
• Fan-tray is absent.
• Post-cool period (time elapsed after fan tray removal) has crossed 4 minutes.
• Pre-cool period (time elapsed before fan tray removal) has crossed 1 hour and 9 minutes—The fan tray
has not been removed since the past 1 hour and 9 minutes during which the switch was ready for fan tray
removal.
The following example shows the syslogs that are generated when the fan speed increases due to a minor
temperature alarm:
2017 Apr 3 16:46:07 SWITCH %CARDCLIENT-2-SSE: XBAR:5 FABRIC ONLINE
2017 Apr 3 16:46:07 SWITCH %PLATFORM-5-MOD_STATUS: Fabric-Module 5 current-status is
MOD_STATUS_ONLINE/OK
2017 Apr 3 16:46:07 SWITCH %MODULE-5-XBAR_OK: Xbar 5 is online (Serial number: JAE1921079X)
2017 Apr 3 16:47:00 SWITCH %PLATFORM-2-MOD_TEMPMINALRM: Xbar-5 reported minor temperature
alarm. Sensor=1 Temperature=48 MinT
hreshold=20
2017 Apr 3 16:47:00 SWITCH %VSHD-5-VSHD_SYSLOG_CONFIG_I: Configured from vty by admin on
vsh.12644
2017 Apr 3 16:47:35 SWITCH %PLATFORM-6-PFM_INFO: Fan Zone 1 : Fan Speed will change from
45.88(0x75) to 54.12(0x8a)
2017 Apr 3 16:54:50 SWITCH %PLATFORM-2-PFM_MODULE_POWER_OFF: Manual power-off of Xbar 5
from Command Line Interface
2017 Apr 3 16:54:50 SWITCH %PLATFORM-5-XBAR_PWRDN: Xbar 5 powered down (Serial number
JAE1921079X)
2017 Apr 3 16:54:50 SWITCH %PLATFORM-5-MOD_STATUS: Fabric-Module 5 current-status is
MOD_STATUS_CONFIGPOWERED_DOWN
2017 Apr 3 16:54:50 SWITCH %PLATFORM-5-MOD_STATUS: Fabric-Module 5 current-status is
MOD_STATUS_POWERED_DOWN
2017 Apr 3 16:58:40 SWITCH %PLATFORM-6-PFM_INFO: Fan Zone 1 : Fan Speed will change from
54.12(0x8a) to 45.88(0x75)
2017 Apr 3 17:00:41 SWITCH %PLATFORM-2-PFM_MODULE_POWER_ON: Manual power-on of Xbar 5 from
Command Line Interface
2017 Apr 3 17:00:41 SWITCH %PLATFORM-2-XBAR_DETECT: Xbar 5 detected (Serial number
JAE1921079X)
2017 Apr 3 17:00:41 SWITCH %PLATFORM-5-XBAR_PWRUP: Xbar 5 powered up (Serial number
JAE1921079X)
2017 Apr 3 17:00:41 SWITCH %PLATFORM-5-MOD_STATUS: Fabric-Module 5 current-status is
MOD_STATUS_POWERED_UP
2017 Apr 3 17:00:59 SWITCH %CARDCLIENT-2-SSE: XBAR:5 FABRIC ONLINE
OL-30452-01.
Note
Fan tray maintenance mode is cancelled and fan speed is set to normal if fan tray
migration or replacement is completed within 2 minutes of using the hardware
fan-tray maintenance-mode command. If fan tray migration or replacement is
not completed within 2 minutes, the remaining fan trays run at 85 percent speed
for the next 2 minutes, and at 100 percent speed from then on.
Cisco Nexus 7710 Switch Site Preparation and Hardware Installation Guide
Replacing a Fan Tray
Reference.
117
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