Brocade Communications Systems MLX Series Hardware Installation Manual page 254

6
Managing the cooling system
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•
•
•
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For the low-threshold and high-threshold parameters, you can specify any temperature in
Centigrade. However, when changing low and high temperature thresholds for module fan speeds,
remember that the low temperature threshold of a higher fan speed must be lower than the high
temperature threshold of the lower fan speed. Brocade has established this guideline to ensure fan
speed stability.
For example, if you are changing the temperature thresholds for a management module high and
medium-high fan speeds, the system will accept the following values because the low temperature
threshold for the high speed (79
medium-high speed.
Fan speed
High
Medium-high
The device will not accept the following values because the low temperature threshold for the high
speed (83
Fan speed
High
Medium-high
Displaying temperature thresholds for modules and fan speeds
To check the current settings of the low and high temperature thresholds for modules and fan
speeds, you can enter the show fan-threshold command at any level of the CLI.
Brocade# show fan-threshold
=== Thermal Sensor Control Block (THERMAL_SENSOR_TEST_RULE_MP) ===
Fan Speed Low: -1 - 60
Fan Speed Med: 57 - 70
Fan Speed Med-Hi: 67 - 80
Fan Speed Hi: 77 - 85
state = 0 (FAN_STATE_LOW)
max_ts_shut_off_count = 1
shut_off_count = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
=== Thermal Sensor Control Block (THERMAL_SENSOR_TEST_RULE_SNM) ===
Fan Speed Low: -1 - 30
Fan Speed Med: 27 - 40
Fan Speed Med-Hi: 37 - 50
Fan Speed Hi: 47 - 75
state = 2 (FAN_STATE_MED_HI)
max_ts_shut_off_count = 1
shut_off_count = 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
=== Thermal Sensor Control Block (THERMAL_SENSOR_TEST_RULE_LP) ===
238
lp2 – Changes low and high temperature thresholds for Gen 2 interface modules
mp – Changes low and high temperature thresholds for management modules
mp-cpu – Changes low and high temperature thresholds for the management module CPU
switch-fabric – Changes low and high temperature thresholds for non-high-speed switch fabric
modules
switch-fabric-g2 – Changes low and high temperature thresholds for high speed switch fabric
modules (hSFM)
Low temperature threshold
79° C
69° C
C) is higher than the high temperature threshold (82
°
Low temperature threshold
83° C
69° C
C) is lower than the high temperature threshold (82
°
Brocade MLX Series and NetIron XMR Hardware Installation Guide
C) for the
°
High temperature threshold
87° C
82° C
C) for the medium-high speed.
°
High temperature threshold
87° C
82° C
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