Brocade Communications Systems MLX Series Installation Manual page 352

7
Managing the cooling system
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) ===
Fan Speed Low: -1 - 50
Fan Speed Med: 46 - 55
Fan Speed Med-Hi: 51 - 60
Fan Speed Hi: 56 - 95
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_LP_XPP) ===
Fan Speed Low: -1 - 50
Fan Speed Med: 45 - 65
Fan Speed Med-Hi: 60 - 75
334
C) is lower than the high temperature threshold (82

Low temperature threshold
79C
69C
C) is higher than the high temperature threshold (82

Low temperature threshold
83C
69C
Brocade MLX Series and Brocade 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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