Monitoring Fan Tray Status; Fan Redundancy; Hot Swapping The Fan Tray - Alcatel-Lucent OmniSwitch 9800E Hardware User's Manual

Chassis and Power Supplies

Monitoring Fan Tray Status

The CMM constantly monitors fan operation. If any of the switch's fans unexpectedly shuts down, the
CMM sends out a trap and the FAN LED on the CMM's front panel displays amber.
Note. To check the switch's current fan tray status, use the
-> show fan
Fan Status
------+---------------
Fan-1 Running
Fan-2 Running
Fan-3 Running
For more information about these displays, see the "Chassis Management and Monitoring Commands"
chapter in the OmniSwitch CLI Reference Guide.

Fan Redundancy

In the event that one fan quits unexpectedly, the remaining fans will continue running; switch operations
are not disrupted.
Note. One fan failure needs to be reported immediately to have an RMA unit available, and upon receiv-
ing the unit it must be replaced immediately. If no action is taken and a second fan fails, the chassis will
shutdown all NIs after one minute and fifteen seconds. For information on emergency replacement of the
fan tray, refer to

"Hot Swapping the Fan Tray"

Storing Backup Fan Trays. It is a good idea to keep at least one backup fan tray in your data facility or
other hardware storage area.
Hot Swapping the Fan Tray
As stated previously, the fan tray is the main temperature control component of the switch. As a result, the
fan tray should never be removed while the switch is operating unless it is absolutely necessary.
However, if the fan tray requires immediate replacement or service, the fan tray can be hot swapped—i.e.,
it can be changed out without shutting off the switch.
Important. Hot swapping the fan tray is a time-sensitive procedure. If the fan tray is removed, it must be
replaced within one minute and fifteen seconds. Otherwise, overheating will occur, which can lead to
system failure.
For detailed instructions on properly removing and installing a fan tray, refer to
2-35.
OmniSwitch 9000E Series Hardware Users Guide
show fan command. For example:
below.
December 2008
Chassis Fan Tray
page 2-34 through page
page 2-33