Brocade Communications Systems S3-1002483-03 manual Managing the cooling system

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		80
Fan Speed	Med-Hi:	67 -
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		80
Fan Speed	Med-Hi:	67 -
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

Brocade BigIron RX Series Hardware Installation Guide	85
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