Line Card Chassis Enhanced Router Airflow - Cisco CRS-1 System Description

Line Card Chassis Enhanced Router Airflow

Line Card Chassis Enhanced Router Airflow
The airflow through the Cisco CRS 8-slot Line Card Chassis Enhanced router is controlled by a push-pull
configuration . The bottom fan tray pulls in ambient air from the bottom front of the chassis and the top fan
pulls the air up through the card cages where the warm air is exhausted out the bottom rear of the chassis.
Figure 19: Airflow Through the Cisco CRS 8-Slot Line Card Chassis Enhanced Router
The Cisco CRS 8-slot Line Card Chassis Enhanced router airflow volumes are as follows:
• Chassis airflow: Up to 1000 cubic feet (28, 317liters) per minute
• Power system airflow: Up to 240 cubic feet (6,800 liters) per minute
The chassis has a replaceable air filter mounted in a slide-out tray above the lower fan tray. The Cisco CRS
8-slot Line Card Chassis Enhanced router air filter plugs into the rear (MSC) side of the chassis.
Change the air filter as often as necessary. In a dirty environment, or when you start getting frequent temperature
alarms, check the intake grilles for debris and check the air filter to see if it needs to be replaced. Before
removing the air filter for replacing, you should have a spare filter on hand. Then, when you remove the dirty
filter, install the spare filter in the chassis.
Note
We recommend that you check the air filters once a month. Replace a filter when you notice a significant
amount of dust.
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced Router System Description
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Cooling System