Cisco MDS 9000 Series Configuration Manual page 172

About Fan Modules
replacing a failed fan module in a running switch, be sure to replace the new fan module within five
minutes.
If one or more fans fail within a fan module, the Fan Status LED turns red. A fan failure could lead to
Note
temperature alarms if not corrected immediately.
The fan status is continuously monitored by the Cisco MDS NX-OS software. In case of a fan failure, the
following action is taken:
• 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.
This example shows the chassis fan information.
switch# show environment fan
------------------------------------------------------
Fan
------------------------------------------------------
Chassis
PS-1
PS-2
The possible Status field values for a fan module on the Cisco MDS 9500 Series switches are as follows:
• If the fan module is operating properly, the status is ok.
• If the fan is physically absent, the status is absent.
• If the fan is physically present but not working properly, the status is failure.
On the Cisco MDS 9513 Director, the front fan module has 15 fans. If the front fan module (DS-13SLT-FAN-F)
State field contains "failure" in the show environment fan command output, it also displays the numbers of
the failing fans.
This example shows a Cisco MDS 9513 front fan module failure.
switch# show environment fan
------------------------------------------------------
Fan
------------------------------------------------------
Chassis
Chassis
PS-1
PS-2
Cisco MDS 9000 Family NX-OS Fundamentals Configuration Guide
154
Model Hw
DS-9SLOT-FAN 1.2
-- --
-- --
Model Hw
DS-13SLT-FAN-F 0.3
DS-13SLT-FAN-R 0.3
-- --
-- --
Managing System Hardware
Status
ok
ok
absent
Status
failure 3 5 6 13
ok
ok
ok
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