Cisco Cisco Packet Data Gateway (PDG)

 

 

Note:  On some platforms, the output will change to show the state of the fan controller and the speed of each fan. 

 

 

Upper Fan 
Controller 

The Upper Fan Tray pulls air through the chassis and exhausts it from the upper rear of the 
chassis.

 

Lower Fan 
Controller 

The Lower Fan Tray pulls ambient air into the chassis and pushes it upward and through the 
chassis.

 

State 

Displays the operational state of the fan tray and fan tray controller. The possible states are: 

Normal: There are no errors. This is the normal operating condition.

 

Multiple Fan Failure: Multiple fans on the fan tray have failed.

 

Single Fan Failure: A single fan on the fan tray has failed.

 

Heartbeat Error: The redundant fan controller on the fan tray did not respond to the heartbeat 
signal.

 

Fan A Communication Error: An error has occurred on the primary fan controller bus for the 
fan tray.

 

Fan B Communication Error: An error has occurred on the redundant fan controller bus for the 
fan tray.

 

Communication Error: An inter-bus communication error was experienced between the primary 
and redundant fan controllers on the fan tray.

 

NOTE: If any of the error conditions above are reported for your system, it is likely that the fan 
tray will need to be repaired or replaced. Please contact your local sales representative for 
additional information.