Installation Guide

Brocade MLX Series and Brocade NetIron XMR Installation Guide 37
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Router modules
DRAFT: BROCADE CONFIDENTIAL
FIGURE 30 Rear fan locations for Brocade MLX and NetIron XMR 32-slot routers
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:
• Leave the fan speed as is
• Increase the fan speed
• Decrease the fan speed
• Shut down a module to prevent damage
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 <Link>“Changing temperature
thresholds for modules and fan speeds” on page 222.
1 - 10 Fan modules 1 - 10, numbered as labeled