Brocade Communications Systems NetIron MLXe Series, Hardware Installation Manual

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After you enter this command, enter the write -memory command and restart the router.
Managing the cooling system
This section provides configuration, management, and monitoring information about router cooling systems.
Configuring the cooling system
Your router is pre-configured with default settings for all cooling system parameters. Although no initial configuration of the cooling
system is necessary, you can change the settings of the following cooling system parameters:
• Low and high temperature thresholds for modules and fan speeds
• Interval at which the system polls the temperature sensors on the module for a reading
NOTE
Auto control of fan speed is not monitored when cards are in interactive mode. Set fan speed to high to prevent over-temp
condition.
NOTE
Adjusting fan controls out of the default setting can negatively affect the efficient cooling of blades and may cause a blade to
overheat and shutdown.
Changing temperature thresholds for modules and fan speeds
The cooling system includes fans that operate at four speeds: low, medium, medium-high, and high. In general, each fan speed, (except
for low), has a low and high temperature threshold associated with it, as shown in the following figure. The low fan speed has a high
temperature threshold only.
NOTE
Adjusting fan controls out of the default setting can negatively affect the efficient cooling of blades and may cause a blade to
overheat and shutdown.
FIGURE 107 Fan speeds and temperature thresholds
The low and high temperature thresholds allow the router to determine the speed at which the fans should operate. In general, the fans
operate according to these guidelines:
• If the temperature of all modules falls between the low and high thresholds for a fan speed, the fan continues to operate at that
speed.
• If the temperature of a management module, switch fabric module, or one interface module exceeds the high threshold
specified for a fan speed, the fan changes to the next higher speed. If the temperature of any of the modules exceeds the high
Managing the cooling system
Brocade NetIron MLXe Series Hardware Installation Guide
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