Dell PowerConnect B - MLXe 4 Hardware Installation Manual page 120

5
Managing the cooling system
Table 21
TABLE 21
Fan speed
Management modules
High
Medium-high
Medium
Low
Interface modules
High
Medium-high
Medium
Low
Switch fabric module
High
Medium-high
Medium
Low
For information about checking the current low and high temperature threshold settings for
modules and fan speeds, refer to
on page 109.
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
global CONFIG level of the CLI.
PowerConnect(config)# fan-threshold mp med 56 72
Syntax: fan-threshold <module> [low <high-threshold>] [med <low-threshold> <high-threshold>]
For the <module> parameter, you can specify the following:
•
•
•
•
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. Dell has established this guideline to ensure fan
speed stability.
108
describes the default temperature thresholds for PowerConnect B-MLXe devices.
Default temperature thresholds for modules and fan speeds for PowerConnect B-MLXe devices
Low temperature threshold
77 C
67C
57C
–1
56 C
51C
46 C
–1
72 C
67 C
57C
–1

[med-hi <low-threshold> <high-threshold>] [high <low-threshold> <high-threshold>]
lp – Changes low and high temperature thresholds for interface modules
mp – Changes low and high temperature thresholds for management modules
mp-cpu – Changes low and high temperature thresholds for the management module CPU
switch fabric – Changes low and high temperature thresholds for switch fabric modules
"Displaying temperature thresholds for modules and fan speeds"
C and 72 s C, respectively, enter the following command at the

PowerConnect B-MLXe Hardware Installation Guide
High temperature threshold
85C
80C
70C
60C
85C
60C
55 C
50C
85 C
80C
70C
60 C
53-1002111-01