Cisco Cisco Packet Data Gateway (PDG)
Statistics and Counters Reference, StarOS Release 17 ▄
3543
Chapter 148
show fans
Important:
On some platforms, the output will change to show the state of the fan controller and the speed of
each fan.
Table 328.
show fans
Command Output Descriptions
Field
Description
Upper Fan
Controller
Controller
The Upper Fan Tray pulls air through the chassis and exhausts it from the upper rear of the chassis.
Lower Fan
Controller
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.
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.
be repaired or replaced. Please contact your local sales representative for additional information.
Speed
Indicates the rate at which the fans on the fan tray are spinning as a percentage of the maximum speed.
Lower percentages indicate that the fans are having to do less work to keep the chassis cool and should be the
normal operating condition.
Higher percentages indicate that the fans are having to work harder to keep the chassis cool. This could be due to
a number of reasons including improper ventilation of the chassis, individual fan failures, or even a dirty air filter.
Please refer to the System Administration Guide for information on troubleshooting the problem.
NOTE: Systems equipped with the dual-speed fan tray controller display the fan speed as follows:
Normal: The fans on the fan tray are operating at a normal speed to maintain a safe operating temperature for the
chassis and its components.
High: The fans on the fan tray are operating in high speed to maintain a safe operating temperature for the chassis
and its components.
Lower percentages indicate that the fans are having to do less work to keep the chassis cool and should be the
normal operating condition.
Higher percentages indicate that the fans are having to work harder to keep the chassis cool. This could be due to
a number of reasons including improper ventilation of the chassis, individual fan failures, or even a dirty air filter.
Please refer to the System Administration Guide for information on troubleshooting the problem.
NOTE: Systems equipped with the dual-speed fan tray controller display the fan speed as follows:
Normal: The fans on the fan tray are operating at a normal speed to maintain a safe operating temperature for the
chassis and its components.
High: The fans on the fan tray are operating in high speed to maintain a safe operating temperature for the chassis
and its components.