• Maintain a minimum clearance of 3 inches on the front and back sides of the chassis for the cooling air
inlet and exhaust ports, respectively. Avoid placing the chassis in an overly congested rack or directly
next to another equipment rack; the heated exhaust air from other equipment can enter the inlet air vents
and cause an over temperature condition inside the controller.
To prevent chassis overheating, never install a Cisco Catalyst 9800-80 Wireless Controller in an enclosed
space that is not properly ventilated or air conditioned.
Caution
• Always install heavier equipment in the lower half of a rack to maintain a low center of gravity to prevent
the rack from falling over.
• Install and use the cable-management brackets included with the controller to keep cables organized and
out of the way of cards and processors. Ensure that cables from other equipment already installed in the
rack do not impair access to the cards or require you to disconnect cables unnecessarily to perform
equipment maintenance or upgrades.
• Provide an adequate chassis ground (earth) connection for your controller chassis.
In addition to the preceding guidelines, review the precautions for avoiding excessive temperature conditions
in the
Physical Characteristics
section and the
Site Environmental Requirements
section.
Verifying Rack Dimensions
Before you begin
Before you install the chassis, measure the space between the vertical mounting flanges (rails) on your
equipment rack to verify that the rack conforms to the measurements shown in the following figure.
Figure 9: Verifying Equipment Rack Dimensions
Step 1
Mark and measure the distance between two holes on the left and right mounting rails. The distance should measure 18.31
inches ± 0.06 inches (46.5 cm ± 0.15 cm)
Measure for pairs of holes near the bottom, middle, and top of the equipment rack to ensure that the rack posts
are parallel.
Note
Cisco Catalyst 9800-80 Wireless Controller Hardware Installation Guide
42
Installing the Controller
Verifying Rack Dimensions
