Cisco Catalyst 9400 Series

The arrows on the top edge of the air filter note the direction of airflow. (Airflow direction is from
right to left, when you stand facing the chassis). Insert the air filter into its housing with the arrows
pointing toward the chassis.
Note
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
76
Installing the Switch
Rack-Mounting the Chassis in a NEBS-Compliant Mode