About Fan Modules - HP Cisco MDS 9020 - Fabric Switch Configuration Manual

Chapter 10 Managing System Hardware
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
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Example 10-5 Displays Temperature Information for Generation 2 Hardware
switch# show environment temperature
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Module
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1
1
1
1
1
1
6
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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:
•
•
•
Use the show environment fan command to display the fan module status (see
OL-16184-01, Cisco MDS SAN-OS Release 3.x
Outlet 75
Intake 65
Outlet 75
Intake 65
Sensor MajorThresh
(Celsius)
Outlet1 75
Outlet2 65
Intake1 65
LcFwdUp 65
LcFwdDn 65
FC-MAC 65
Outlet1 75
Outlet2 65
Intake1 65
Crosbar 65
Arbiter 65
CPU 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).
60 33
50 30
60 34
50 39
MinorThres CurTemp
(Celsius) (Celsius)
60 33
50 30
50 30
50 35
50 39
50 34
60 33
50 30
50 30
50 35
50 39
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Cisco MDS 9000 Family CLI Configuration Guide
About Fan Modules
ok
ok
ok
ok
Status
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
ok
Example 10-6).
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