Brocade Communications Systems MLX Series Hardware Installation Manual page 55

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At startup, the fans operate at high speed. After a period of time, the management module
changes the fan speed to low.
By default, the router polls the temperature sensor on each module every 60 seconds for a
temperature reading. Depending on the results, the router will:
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If the temperature of a module exceeds specified high temperature thresholds, the system
generates a Syslog message and SNMP trap. The system can also shut down the module if the
temperature exceeds the highest threshold.
You can change default low and high temperature thresholds for modules and fan speeds. Refer to
"Changing temperature thresholds for modules and fan speeds"
Brocade MLX Series and NetIron XMR Hardware Installation Guide
53-1003821-01
Fan modules 1 - 10, numbered as labeled
Leave the fan speed as is
Increase the fan speed
Decrease the fan speed
Shut down a module to prevent damage
Router modules
on page 235.
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