Installation Guide

Brocade MLX Series and Brocade NetIron XMR Installation Guide 225
53-1004195-02
Managing the cooling system
DRAFT: BROCADE CONFIDENTIAL
• 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)
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 C) is lower than the high temperature
threshold (82 C) for the medium-high speed.
The device will not accept the following values because the low temperature threshold for the high speed (83 C) is higher than the high
temperature threshold (82 C) for the medium-high speed.
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 Low temperature threshold High temperature threshold
High 79C87C
Medium-high 69C82 C
Fan speed Low temperature threshold High temperature threshold
High 83C87 C
Medium-high 69C82 C