Install The Switch In A Nebs-Compliant Mode; Nebs-Compliant Air Filter - Cisco Catalyst 9404R Switch Hardware Installation Manual

Install the Switch in a NEBS-Compliant Mode

Install the Switch in a NEBS-Compliant Mode

NEBS-Compliant Air Filter

A Network Equipment-Building System (NEBS) compliant installation allows filtered, front-to-rear airflow.
To mount the chassis in a NEBS-compliant mode with the air filter, use a 23-inch rack mount. Filter brackets
that are mounted on the side of the chassis hold the air filter. For more details on the air filter, refer step 6 of
Rack-Mounting the Chassis in a NEBS-Compliant Mode, on page 67
A 23-inch rack mount is used for mounting the switch in a standard 23 inch (58.4 cm) equipment rack with
two unobstructed outer posts. This kit is not suitable for racks with obstructions (such as a power strip) that
could impair access to the field-replaceable units (FRUs) of the switch.
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
66
Installing the Switch
section.