Cisco ASR 5000 Series, Installation Manual

Page: 214 / 317

Replacing the Chassis Air Filter
▀ Determining When an Air Filter Needs Replacing
▄ ASR 5000 Installation Guide
214
Determining When an Air Filter Needs Replacing
If the air filter is replaced at least every six months as preventive maintenance, there should be no need for out-of-cycle
replacement. However, under certain conditions the air filter may need replacement between maintenance periods.
One possible indication that an air filter needs to be replaced is if the chassis temperature remains high for extended
periods of time. This condition causes the dual-speed fans to run at high speed. A clogged and dirty air filter hinders air
flow through the chassis resulting in higher operating temperatures.
To monitor chassis temperature and fan speed, issue the following CLI command in the Exec mode:
show fans
The following is a sample output for this command:
Upper Fan Controller: State=All Running Speed=Normal Temp=20 (C)
Lower Fan Controller: State=All Running Speed=Normal Temp=20 (C)
To monitor the temperature of individual cards, enter the following CLI command in the Exec mode. [Enter the upper
slot number for an XGLC.]
show card info slot_#
This command displays operational information, including the temperature for the card installed in chassis
slot_#
,
which can be any integer value between 1 and 48.
The system supports Simple Network Management Protocol (SNMP) traps that are triggered for conditions that may
indicate the need to change the air filter:
SNMP Trap Description
starFanSpeed The speed of the fans controlled by this fan controller. The value normal(1) indicates the normal
operating speed of the fans.
The value high(2) indicates that the fans are running at a higher rate of speed.
Fans running at a higher temperature may be the result of a dirty air filter.
showCardTemperature The temperature, in degrees Celsius, as measured on the card.
A value of 0 indicates that the temperature cannot be read or that the card is not present. The
maximum measurable temperature is 70°C.
The safe operating temperature range for the chassis and its sub-components is between 0 and 55°C.
starCardTempOverheat The card has reached a temperature beyond its safe operating range.
The safe operating temperature range for the chassis and its sub-components is between 0 and 55°C.
starCardTempOK The temperature of the card is currently within its safe operating range.
This notification is only generated if the card has previously generated a starCardTempOverheat
notification.