Cisco Cisco Packet Data Gateway (PDG) Guia Da Instalação
Replaceable Components
▀ Air Filters
▄ ASR 5500 Installation Guide
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Air Filters
Lower fan trays draw ambient air into the chassis. Each is equipped with a particulate air filter to prevent dust and
debris from entering the chassis. The two air filters (one front and one rear) must be changed periodically to ensure
proper ventilation and air flow through the chassis.
debris from entering the chassis. The two air filters (one front and one rear) must be changed periodically to ensure
proper ventilation and air flow through the chassis.
You should replace the air filters at least every six months. Keep replacement air filters on site. A single kit includes
filters for both the front fan tray and the rear fan tray (ASR55-FLTR-AIR-F=). Having this kit on-hand ensures that
qualified service personnel can quickly replace the filters as necessary. The filters should be replaced during a
maintenance window when low traffic volume is expected.
filters for both the front fan tray and the rear fan tray (ASR55-FLTR-AIR-F=). Having this kit on-hand ensures that
qualified service personnel can quickly replace the filters as necessary. The filters should be replaced during a
maintenance window when low traffic volume is expected.
Determining When an Air Filter Needs Replacing
If the air filters are replaced at least every six months as part of routine maintenance, there should be no need for out-of-
cycle replacement. However, under certain conditions, the air filters may need replacement between maintenance
periods.
cycle replacement. However, under certain conditions, the air filters may need replacement between maintenance
periods.
High Operating Temperatures and Fan Speeds
One possible indication that air filters need to be replaced is if the chassis temperature remains high for extended
periods of time. This condition causes the multi-speed fans to run at high speed. Clogged and dirty air filters could
hinder air flow through the chassis and result in higher operating temperatures.
periods of time. This condition causes the multi-speed fans to run at high speed. Clogged and dirty air filters could
hinder air flow through the chassis and result in higher operating temperatures.
Temperature and Fan Alarm Commands
show fans Command
To monitor chassis temperature and fan speed, issue the show fans command in the CLI Exec mode.
The following is a sample output for this command:
[local]asr5500# show fans
Lower Rear Fan Tray: State=Normal Speed=65% Temp=27 C
Lower Front Fan Tray: State=Normal Speed=65% Temp=27 C
Upper Rear Fan Tray: State=Normal Speed=70% Temp=28 C
Upper Front Fan Tray: State=Normal Speed=70% Temp=40 C
Lower Rear Fan Tray: State=Normal Speed=65% Temp=27 C
Lower Front Fan Tray: State=Normal Speed=65% Temp=27 C
Upper Rear Fan Tray: State=Normal Speed=70% Temp=28 C
Upper Front Fan Tray: State=Normal Speed=70% Temp=40 C
Important:
The safe operating temperature range for the chassis and its components is between -5 degrees C and
50 degrees C (23 degrees F and 122 degrees F).
show temperature Command
The show temperature command displays the relative temperature state of all cards currently installed, as well as the
ambient temperature at all fan tray units.
ambient temperature at all fan tray units.