Brocade MLX Series and Brocade NetIron XMR Hardware ...

Managing the cooling system 7Managing the cooling systemThis section provides configuration, management, and monitoring information about router coolingsystems.Configuring the cooling systemYour router is pre-configured with default settings for all cooling system parameters. Although noinitial configuration of the cooling system is necessary, you can change the settings of the followingcooling system parameters:• Low and high temperature thresholds for modules and fan speeds• Interval at which the system polls the temperature sensors on the module for a readingNOTEAuto control of fan speed is not monitored when cards are in interactive mode. Set fan speed to highto prevent over-temp condition.NOTEAdjusting fan controls out of the default setting can negatively affect the efficient cooling of bladesand may cause a blade to overheat and shutdown.Changing temperature thresholds for modules and fan speedsThe cooling system includes fans that operate at four speeds: low, medium, medium-high, andhigh. In general, each fan speed, (except for low), has a low and high temperature thresholdassociated with it, as shown in Figure 227. The low fan speed has a high temperature thresholdonly.NOTEAdjusting fan controls out of the default setting can negatively affect the efficient cooling of bladesand may cause a blade to overheat and shutdown.FIGURE 227Fan speeds and temperature thresholdsOperatingTemperatureLow SpeedHigh, 60 deg.MediumSpeedMed-HighSpeed50 55 60 65 70 75 80 85 90 95Low 57, deg.Low, 67 deg.High, 70 deg.High, 80 deg.HighSpeedLow, 77 deg.High, 85 deg.The low and high temperature thresholds allow the router to determine the speed at which the fansshould operate. In general, the fans operate according to these guidelines:• If the temperature of all modules falls between the low and high thresholds for a fan speed, thefan continues to operate at that speed.Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide 33153-1002373-02