Brocade Communications Systems 53-1002373-02 manual Brocadeconfig# fan-threshold mp med 56

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.

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° C	85° C
Medium-high	67° C	80° C
Medium	57° C	70° C
Low	–1°	60° C
Interface modules
High	56° C	95° 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

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

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