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Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-23069-06
Appendix 8 Managing the Switch Hardware
Information About Fan Trays
• The fan tray is removed for replacement—The fan tray is designed to be removed and replaced while
the system is operating without presenting an electrical hazard or damage to the system. Depending
on the type of fan tray that you remove, one of the following will occur:
–
Cisco Nexus 7004 or 7009 Series fan tray—The switch can function without a fan tray for up
to two minutes by which time you must replace the missing fan tray.
–
Cisco Nexus 7010 Series system fan tray—The fans in the remaining system fan tray increase
their speeds as needed for the current temperature until you replace the missing fan tray.
–
Cisco Nexus 7010 Series fabric fan tray—The fan in the remaining fabric fan tray increases its
speed to the maximum speed until you replace the missing fabric fan tray.
–
Cisco Nexus 7018 Series fan tray—If you do not replace the fan tray within three minutes, the
system shuts down the modules cooled by the removed fan tray. For the top fan tray, that means
that the system would shut down the supervisor in slot 9, the I/O modules in slots 1 through 8,
and the fabric modules. For the bottom fan tray, that means that the system would shut down the
supervisor in slot 10 and the I/O modules in slots 11 through 18.
Note When replacing a failed fan tray in a running system, be sure to promptly replace the fan tray.
Tip 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:
• System messages are displayed.
• Call Home alerts are sent (if configured).
• SNMP notifications are sent (if configured).
To display the fan module statuses, use the show environment fan command as shown inExample 8-8
(Cisco Nexus 7004 switch), Example 8-9 (Cisco Nexus 7009 switch), Example 8-10 (Cisco Nexus 7010
switch), or Example 8-11 (Cisco Nexus 7018 switch).
Example 8-8 Displaying Fan Information for a Cisco Nexus 7004 Series Chassis
switch# show environment fan
Fan:
-------------------------------------------------------
Fan Model Hw Status
-------------------------------------------------------
Fan1(sys_fan1) N7K-C7004-FAN 0.110 Ok
Fan_in_PS1 -- -- Ok
Fan_in_PS2 -- -- Ok
Fan_in_PS3 -- -- Absent
Fan_in_PS4 -- -- Absent
Fan Zone Speed: Zone 1: 0x7f
Fan Air Filter : Absent
Example 8-9 Displaying Fan Information for a Cisco Nexus 7009 Series Chassis
switch# show environment fan
Fan:
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