Brocade MLX Series and Brocade NetIron XMR Hardware ...

7Managing the cooling systemChanging the temperature polling intervalBy default, the router reads the temperature sensor on each module every 60 seconds. To changethe polling interval, enter the temp-poll-period command at the global CONFIG level of the CLI.Brocade(config)# temp-poll-period 120Syntax: temp-poll-period For the parameter, you can specify a value from 30 – 120.NOTEAdjusting temperature polling interval out of the default setting can negatively affect the efficientcooling of blades and may cause a blade to overheat and shutdown.Manually setting the fan speedTypically, the management module, in conjunction with default settings of low and hightemperature thresholds, determines the speed of the two four-speed fans. (For information aboutchanging the low and high temperature thresholds, refer to “Changing temperature thresholds formodules and fan speeds” on page 331.) You can manually set the fan speed using theset-fan-speed command in the Global CONFIG level of the CLI.NOTEAuto control of fan speed is not monitored when cards are in interactive mode. Set fan speed to highto prevent over-temp condition.NOTESetting a value other than auto or high disables auto fan control and will negatively affect theefficient 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-highSyntax: set-fan-speed For the 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 systemYou 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 trap336 Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide53-1002373-02