Brocade Communications Systems 53-1002373-02 manual Displaying fan tray status and speed

Managing the cooling system 7

Displaying fan tray status and speed

To display the status and speed of the 4-speed fans in the router, enter the show chassis command at any level of the CLI.

Brocade#	show chassis
...	---
--- FANS
Back fan	tray 1: Status = OK, Speed = LOW (50%)
Back fan	tray 2: Status = OK, Speed = LOW (50%)
Back fan	tray 3: Status = OK, Speed = LOW (50%)
Back fan	tray 4: Status = OK, Speed = LOW (50%)

Syntax: show chassis

For information about all output generated by the show chassis command, refer to “Displaying device status and temperature readings” on page 324.

TABLE 51	Fan status and speed fields
Field	Description
Status	The status can be one of the following:
	• OK – The fan is functioning properly and is keeping the temperature of each module within
	an acceptable temperature range.
	• Failed – The fan is not functioning properly or the fan control module cannot control the fan.
Speed	The speed can be one of the following:
	• LOW – The fan is functioning at 50 percent of capacity.
	• MEDIUM – The fan is functioning at 75 percent of capacity.
	• MEDIUM-HIGH– The fan is functioning at 90 percent of capacity.
	• HIGH – The fan is functioning at 100 percent of capacity.

Displaying temperature warnings

If the temperature of a module exceeds the high temperature threshold for any of the fan speeds, the system sends a warning message to the system log and an SNMP trap. (For more information about the low and high temperature thresholds, refer to “Changing temperature thresholds for modules and fan speeds” on page 331.) This section describes how to view the system log. If you have configured your router to use a Syslog server or SNMP trap receiver, refer to the documentation for the server or receiver.

To display the system log, enter the show log command at any CLI level.

Brocade# show log

Syntax: show log

Temperature log reduction

Depending on settings and temperature readings, fan speeds are changed dynamically within the following ranges: low, med, med-hi, and high. Fan speed changes are determined by temperature thresholds set for sensors on the management modules, interface modules and switch fabric modules. When a temperature threshold is passed upward on any module, the fan speed changes to the assigned fan speed. This occurs even if the temperature is within the threshold for the slower fan speed on other modules. In previous versions of the software, a log message is sent whenever a temperature threshold is crossed on any module whether the fan speed is actually increased or not. This can result in excessive log messages.

Brocade MLX Series and Brocade NetIron XMR Hardware Installation Guide	337
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