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About Fan Modules
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
Displaying Module Temperature
Use the show environment temperature command to display temperature sensors for each module (see
Example
Example 9-4
switch# show environment temperature
---------------------------------------------------------------
Module
---------------------------------------------------------------
2
2
5
5
6
6
7
7
9
9
About Fan Modules
Hot-swappable fan modules (fan trays) are provided in all switches in the Cisco MDS 9000 Family to
manage airflow and cooling for the entire switch. Each fan module contains multiple fans to provide
redundancy. The switch can continue functioning in the following situations:
•
•
If one or more fans fail within a fan module, the Fan Status LED turns red. A fan failure could lead to
Tip
temperature alarms if not corrected immediately.
The fan status is continuously monitored by the Cisco MDS SAN-OS software. In case of a fan failure,
the following action is taken:
•
•
•
Cisco MDS 9000 Family Configuration Guide
9-10
9-4).
Displays Temperature Information
Sensor
MajorThresh
(Celsius)
Outlet
75
Intake
65
Outlet
75
Intake
65
Outlet
75
Intake
65
Outlet
75
Intake
65
Outlet
75
Intake
65
One or more fans fail within a fan module—Even with multiple fan failures, switches in the Cisco
MDS 9000 Family can continue functioning. When a fan fails within a module, the functioning fans
in the module increase their speed to compensate for the failed fan(s).
The fan module is removed for replacement—The fan module 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 module in a running switch, be sure to replace the new fan
module within five minutes.
System messages are displayed.
Call Home alerts are sent (if configured).
SNMP notifications are sent (if configured).
MinorThres
CurTemp
(Celsius)
(Celsius)
60
35
50
33
60
44
50
36
60
42
50
35
60
33
50
30
60
34
50
39
Chapter 9
Managing System Hardware
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OL-6973-03, Cisco MDS SAN-OS Release 2.x
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