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Managing the cooling system
This section provides configuration, management, and monitoring information for the cooling system in FastIron X Series chassis
devices.
Configuring the cooling system
Since FastIron X Series chassis devices provide default settings for all cooling system parameters, 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
•
Temperature at which the device will shut down
•
Fan speed
Thermal planes
The FSX 800 and FSX 1600 have three thermal planes:
•
Thermal Plane 1 (also called Rule 1/3) - This thermal plane includes the temperature sensors on the management module or
modules only. Each management module has two temperature sensors.
•
Thermal Plane 2 (also called Rule 2/3) - This thermal plane includes all of the temperature sensors on all of the interface
modules. Each interface module has one temperature sensor.
•
Thermal Plane 3 (also called Rule 3/3) - This thermal plane includes all of the temperature sensors on the switch fabric
modules. Each switch fabric module has one temperature sensor.
All thermal planes, along with temperature thresholds, help determine at which speed the fans should operate. For each thermal plane,
you can define separate temperature thresholds for fan speeds. Each thermal plane can have different temperature thresholds.
For each thermal plane, the Brocade device records the highest temperature based on the temperature reading of all of the modules in
the thermal plane. The system uses this information and the current configured temperature thresholds to adjust the fan speed. You can
view the temperature of each thermal plane using the show chassis command.
Fan speed modes
The fans can operate in automatic or manual mode. The default is automatic mode. This section describes both methods.
Automatic mode
By default, the fans operate in automatic mode, self-adjusting their speed based on both of the following factors:
•
The current temperature of each thermal plane
•
The current configured temperature threshold ranges for all fan speeds
The Brocade device has default temperature threshold ranges for fan speeds
fan speeds
on page 100). If desired, you can change these settings.
The software regularly polls the chassis to obtain the temperature of each thermal plane, then uses this information to decide whether or
not to switch the fan speed. By default, the Brocade device polls the chassis every 60 seconds for temperature data. You can change this
interval using the CLI command chassis poll-time .
Brocade FastIron SX Series Chassis Hardware Installation Guide
Part Number: 53-1003613-04
(Changing temperature thresholds for thermal planes and
Managing the cooling system
99
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