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336 Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide
53-1002373-02
Managing the cooling system
7
Changing the temperature polling interval
By default, the router reads the temperature sensor on each module every 60 seconds. To change
the polling interval, enter the temp-poll-period command at the global CONFIG level of the CLI.
Brocade(config)# temp-poll-period 120
Syntax: temp-poll-period <seconds>
For the <seconds> parameter, you can specify a value from 30 – 120.
NOTE
Adjusting temperature polling interval out of the default setting can negatively affect the efficient
cooling of blades and may cause a blade to overheat and shutdown.
Manually setting the fan speed
Typically, the management module, in conjunction with default settings of low and high
temperature thresholds, determines the speed of the two four-speed fans. (For information about
changing the low and high temperature thresholds, refer to “Changing temperature thresholds for
modules and fan speeds” on page 331.) You can manually set the fan speed using the
set-fan-speed command in the Global CONFIG level of the CLI.
NOTE
Auto control of fan speed is not monitored when cards are in interactive mode. Set fan speed to high
to prevent over-temp condition.
NOTE
Setting a value other than auto or high disables auto fan control and will negatively affect the
efficient cooling of blades and may cause a blade to overheat and shutdown.
For example, to set the speed of fan 0 to medium-high, enter the following command.
Brocade# set-fan-speed med-high
Syntax: set-fan-speed <fan-speed>
For the <fan-speed> parameter, you can specify the following:
• auto – The system is adjusted by the monitoring system.
• high – The system sets the fan speed to high.
• low – The system sets the fan speed to low.
• med – The system sets the fan speed to medium.
• med-high – The system sets the fan speed to medium-high.
Monitoring the cooling system
You can monitor the following aspects of the router cooling system:
• The temperature of the fan control modules
• The status and speed of the fans
• The temperature warnings sent to the system log and that generate an SNMP trap