Brocade Communications Systems S3-1002483-03 manual Managing the cooling system

Managing the cooling system 4

You can specify the dynamic-bufferkeyword to clear the dynamic buffer or the static-bufferkeyword to clear the static buffer. If you do not specify a buffer, both buffers are cleared.

Managing the cooling system

This section provides configuration, management, and monitoring information about the BigIron RX Series cooling system.

Configuring the cooling system

The BigIron RX Series switch provides default settings for all cooling system parameters. Therefore, no initial configuration of the cooling system is necessary. If desired, you can change the settings of the following cooling 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 reading

Changing temperature thresholds for modules and fan speeds

The BigIron RX Series cooling system includes fans that operate at speeds of low, medium, medium-high, and high. In general, each fan speed, except for low, has a low and high temperature threshold associated with it as shown in Figure 38. The low fan speed has a high temperature threshold only.

FIGURE 38 Fan speeds and temperature thresholds

High, 60 deg. Low, 67 deg. High, 80 deg.

Operating Temperature

Low Speed						Med-High
						Speed
50	55	60		65	70		75	80	85	90	95
			Medium					High
				Speed				Speed
	Low 57, deg.				High, 70 deg.		Low, 77 deg.		High, 85 deg.

The low and high temperature thresholds enable the BigIron RX Series system77 to determine at which speed the fans should operate. In general, the fans operate as follows:

•If the temperature of all modules falls between the low and high thresholds for a fan speed, the fan continues to operate at that fan speed.

•If the temperature of a management module or the switch fabric module or an interface modules exceeds the high threshold specified for a fan speed, the fan increases its speed to the next higher speed. On the cards with two sensors, each is monitored individually and if either exceeds the threshold limits, then the fan will increase. If the temperature of any of these modules exceeds the high threshold for the high speed for three minutes (the actual number of polls is determined by the setting of the temp-poll-periodcommand), the system shuts down the modules to prevent damage. (For information about temp-poll-periodcommand, refer to “Changing the temperature polling interval” on page 87.)

Brocade BigIron RX Series Hardware Installation Guide	83
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