Brocade Communications Systems Brocade MLX Series and Brocade Netlron XMR 53-1002373-02 - Manual (Page 349)

Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide 331
53-1002373-02
Managing the cooling system
7
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
Figure 227 . 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 227 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.
Operating
Temperature
Medium
Speed
Low Speed Med-High
Speed
High
Speed
50 55 60 65 70 75 80 85 90 95
High, 60 deg.
Low 57, deg. High, 70 deg.
Low, 67 deg. High, 80 deg.
Low, 77 deg. High, 85 deg.