About Module Temperature Monitoring - Cisco MDS 9000 Series Configuration Manual

About Module Temperature Monitoring

Supervisor-2 module switchovers do not occur when removing crossbar switch modules on a Cisco MDS
Note
9513 that has only Generation 2 modules installed.
About Module Temperature Monitoring
Built-in automatic sensors are provided in all switches in the Cisco MDS 9000 Family to monitor your switch
at all times.
Each module (switching and supervisor) has four sensors: 1 (outlet sensor), 2 (intake sensor), 3 (onboard
sensor), and 4 (onboard sensor). Each sensor has two thresholds (in degrees Celsius): minor and major.
A threshold value of –127 indicates that no thresholds are configured or applicable.
Note
• Minor threshold—When a minor threshold is exceeded, a minor alarm occurs and the following action
• Major threshold—When a major threshold is exceeded, a major alarm occurs and the following action
Cisco MDS 9000 Family NX-OS Fundamentals Configuration Guide
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is taken for all four sensors:
◦ System messages are displayed.
◦ Call Home alerts are sent (if configured).
◦ SNMP notifications are sent (if configured).
is taken:
◦ For sensors 1, 3, and 4 (outlet and onboard sensors):
System messages are displayed.
Call Home alerts are sent (if configured).
SNMP notifications are sent (if configured).
◦ For sensor 2 (intake sensor):
If the threshold is exceeded in a switching module, only that module is shut down.
If the threshold is exceeded in an active supervisor module with HA-standby or standby present,
only that supervisor module is shut down and the standby supervisor module takes over.
If you do not have a standby supervisor module in your switch, you have an interval of 2 minutes
to decrease the temperature. During this interval the software monitors the temperature every five
(5) seconds and continuously sends system messages as configured.
To realize the benefits of these built-in automatic sensors on any switch in the Cisco
Tip
MDS 9500 Series, we highly recommend that you install dual supervisor modules. If
you are using a Cisco MDS 9000 Family switch without dual supervisor modules, we
recommend that you immediately replace the fan module if even one fan is not working.
Managing System Hardware
OL-29291-02