Brocade Communications Systems FastIron SX, Руководство по установке оборудования

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• If the temperature of any thermal plane falls below the low threshold for a fan speed, the fan decreases its speed to the next
lower speed. If the temperature of any thermal plane falls below the high threshold for the low speed, the fan operates at the low
speed.
If the temperature of any thermal plane exceeds the high temperature threshold for any of the fan speeds, the software sends a message
to the system log.
The table below outlines the default low and high temperature thresholds for each fan speed, as well as the operating level and noise level
of the fans at each fan speed.
TABLE 24 Default low and high temperature thresholds for thermal planes and fan speeds
Fan Speed Description Low Temperature
Threshold High Temperature
Threshold Fan Operating Level
(% of Capacity) Fan Noise Level
4 High 50 ° C 80 ° C 100 78 dB
3 Medium 49 ° C 59 ° C 50 66 dB
2 Medium-low 48 ° C 58 ° C 37 63 dB
1 Low N/A 57 ° C 25 56 dB
Command syntax
If desired, you can change the default low and high temperature thresholds for a particular thermal plane and fan speed. For example, to
change the low and high thresholds of the medium fan speed for the management module or modules to 56 ° C and 72 ° C,
respectively, enter the following command at the global CONFIG level of the CLI.
device(config)# fan-threshold mp speed-3 56 72
Syntax: fan-threshold module [ speed-1 high-threshold ] [ speed-2 low-threshold high-threshold ] [ speed-3 low-threshold high-
threshold ] [ speed-4 low-threshold high-threshold ]
For the module parameter, specify one of the following:
• lp - Changes low and high temperature thresholds for the Interface modules.
• mp - Changes low and high temperature thresholds for the management module.
• sfp - (FSX 800 and FSX 1600 only) Changes low and high temperature thresholds for the switch fabric modules.
The fan speeds are as follows:
• speed-1 - low
• speed-2 - medium-low
• speed-3 - medium
• speed-4 - high (shutdown temperature)
For the low-threshold and high-threshold variables, 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 the management module’s high and medium-high fans speeds, the
Brocade device will accept the following values because the low temperature threshold for the high speed (67 ° C) is lower than the high
temperature threshold (72 ° C) for the medium-high speed.
Fan Speed Low Temperature Threshold High Temperature Threshold
High 67 ° C 82 ° C
Medium-high 57 ° C 72 ° C
Managing the cooling system
Brocade FastIron SX Series Chassis Hardware Installation Guide
Part Number: 53-1003613-04 101