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Brocade BigIron RX Series Hardware Installation Guide 85
53-1002483-03
Managing the cooling system
4
Syntax: fan-threshold <module> [low <high-threshold>] [med <low-threshold> <high-threshold>]
[med-hi <low-threshold> <high-threshold>] [hi <low-threshold> <high-threshold>]
For the <module> parameter, you can specify the following:
• lp – Changes low and high temperature thresholds for the interface modules.
• mp – Changes low and high temperature thresholds for the active and standby management
modules.
• mp-cpu – Changes low and high temperature thresholds for the active and standby
management module’s CPU.
• switch fabric – Changes low and high temperature thresholds for the switch fabric module.
For the <low-threshold> and <high-threshold> parameters, you can specify any temperature in
Centigrade. However, when changing low and high temperature thresholds for a module’s 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 establishes this guideline to
ensure the fan speed stability.
For example, if you are changing the temperature thresholds for a management module’s high and
medium-high fans speeds, the BigIron RX Series system will accept the following values because
the low temperature threshold for the high speed (77 C) is lower than the high temperature
threshold (79 C) for the medium-high speed.
BigIron RX(config)# fan-threshold mp med-hi 67 79
BigIron RX(config)# fan-threshold mp hi 77 85
However, the BigIron RX Series system will not accept the following values because the low
temperature threshold being entered for the high speed (77× C) is higher than the high
temperature threshold (76× C) for the medium-high speed.
BigIron RX(config)# fan-threshold mp med-hi 67 76
BigIron RX(config)# fan-threshold mp hi 77 85
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 following command at any level of the CLI:
BigIron RX# 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 = 3
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 - 60
Fan Speed Med: 57 - 70
Fan Speed Med-Hi: 67 - 80
Fan Speed Hi: 72 - 85
state = 0 (FAN_STATE_LOW)
max_ts_shut_off_count = 3
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