Foundry NetIron MLX Series Installation and Basic Configuration Guide
5-8
© 2008 Foundry Networks, Inc.
December 2008
For information about checking the current settings of the low and high temperature thresholds for modules and
fan speeds, see “Displaying Temperature Thresholds for Modules and Fan Speeds” on page 5-9.
If desired, you can change the default low and high temperature thresholds for a particular module and fan speed.
For example, to change the low and high thresholds of the medium fan speed for the management modules to
56× C and 72× C, respectively, enter the following command at the global CONFIG level of the CLI:
NetIron(config)# fan-threshold mp med 56 72
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 management modules
•
mp-cpu – Changes low and high temperature thresholds for the 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. Foundry establishes this guideline to ensure fan speed stability.
For example, if you are changing the temperature thresholds for a management module’s high and medium-high
fans speeds, the NetIron MLX Series system will accept the following values because the low temperature
Table 5.3: Default Low and High Temperature Thresholds For Modules and Fan Speeds
Fan Speed
Low Temperature
Threshold
High Temperature
Threshold
Management modules
High
77
°
C
85
°
C
Medium-high
67
°
C
80
°
C
Medium
57
°
C
70
°
C
Low
–1
°
60
°
C
Interface modules
High
56
°
C
85
°
C
Medium-high
51
°
C
60
°
C
Medium
46
°
C
55
°
C
Low
–1
°
50
°
C
Switch fabric module
High
72
°
C
85
°
C
Medium-high
67
°
C
80
°
C
Medium
57
°
C
70
°
C
Low
–1
°
60
°
C
