Cisco Systems Switch Cisco Nexus Switch User Manual

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6-24
Cisco Nexus 7000 Series Hardware Installation and Reference Guide
OL-18634-01
Chapter 6 Managing the Device Hardware
Information About Fan Trays
DETAILED STEPS
Information About Fan Trays
Hot-swappable fan trays are provided in all devices in the Cisco Nexus 7000 Series to manage airflow
and cooling for the entire device. Each fan tray contains multiple fans to provide redundancy. The device
can continue functioning in the following situations:
• One or more fans fail within a fan tray—Even with multiple fan failures, the Cisco Nexus 7000
Series device can continue functioning. When a fan fails within a tray, the functioning fans in the
module increase their speed to compensate for the failed fans.
• 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. 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, these actions occur:
• System messages are displayed.
• Call Home alerts are sent (if configured).
• SNMP notifications are sent (if configured).
Use the show environment fan command to display the fan module status (see Example 6-8).
Example 6-8 Displays Chassis Fan Information
switch# show environment fan
------------------------------------------------------
Fan Model Hw Status
------------------------------------------------------
Chassis DS-9SLOT-FAN 1.2 ok
PS-1 -- -- ok
PS-2 -- -- absent
Command Purpose
Step 1
config t
Example:
switch# config t
switch(config)#
Enters configuration mode.
Step 2
poweroff module
slot_number
Example:
switch(config)# poweroff module 1
switch(config)#
Powers off the specified module (fabric module 1) in the
device.
no poweroff module
slot_number
Example:
switch(config)# no poweroff module 1
switch(config)#
Powers up the specified module (fabric module 1) in the
device.

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