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Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide 333
53-1002373-02
Managing the cooling system
7
Table 49 describes default low and high temperature thresholds for each module and fan speed for
Brocade MLX and Brocade NetIron XMR routers.
For information about checking the current low and high temperature threshold settings for
modules and fan speeds, refer to “Displaying temperature thresholds for modules and fan speeds”
on page 334.
NOTE
Adjusting fan controls out of the default setting can negatively affect the efficient cooling of blades
and may cause a blade to overheat and shutdown.
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 s C, respectively, enter the following command at the
global CONFIG level of the CLI.
Brocade(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>] [high <low-threshold> <high-threshold>]
For the <module> parameter, you can specify the following:
• 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
TABLE 49 Default temperature thresholds for modules and fan speeds for Brocade MLX and Brocade NetIron
XMR devices
Fan speed Low temperature threshold High temperature threshold
Management modules
High 77 C85C
Medium-high 67C80C
Medium 57C70C
Low –1 60C
Interface modules
High 56 C95C
Medium-high 51C60C
Medium 46 C55 C
Low –1 50C
Switch fabric module
High 72 C85 C
Medium-high 67 C80C
Medium 57C70C
Low –1 60 C