Cisco Catalyst 9400 Series Hardware Installation Manual page 48

Rack-Mounting Guidelines
Accordingly, you can install the chassis in 2-post or 4-post racks, but in a 4-post rack, the rear posts are not
used for mounting.
Width and Depth Requirements
Use a tape measure to verify the interior dimensions of the rack
• Measure the space between the inner edges of the left front and right front mounting posts. The chassis
is 17.30 inches (43.942 cm) wide and must fit between the mounting posts.
• Measure the depth of the rack from the outside of the front mounting posts to the outside of the rear
mounting strip. The chassis is 16.30 inches (41.40 cm) deep.
Height Requirements
The rack must have sufficient clearance in terms of height, to insert the chassis. Chassis height is also measured
in rack units (RU or just U) where 1 RU or 1 U equals 1.75 inches (44.45 mm). A typical server rack is 42
RU or 42 U in height.
The chassis heights are as follows:
• The Catalyst 9404R Switch chassis height—10.5 inches (26.67 cms)—6 RU.
• The Catalyst 9407R Switch chassis height—17.41 inches (44.22 cms)—10 RU.
• The Catalyst 9410R Switch chassis height—22.61 inches (57.43 cms)—13 RU.
Other General Guidelines
Caution If the equipment rack is on wheels, ensure that the brakes are engaged and that the rack is stabilized.
Warning To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to
ensure that the system remains stable. The following guidelines are provided to ensure your safety:
• This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
• When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the
heaviest component at the bottom of the rack.
• If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the
unit in the rack. Statement 1006
Warning Take care when connecting units to the supply circuit so that wiring is not overloaded. Statement 1018
Warning To prevent the system from overheating, do not operate it in an area that exceeds the maximum recommended
ambient temperature of: 104o F (40o C) Statement 1047
Cisco Catalyst 9400 Series Switches Hardware Installation Guide
42
Preparing for Installation