Cisco MDS 9216 Hardware Installation Manual page 55

Chapter 2 Installing the Cisco MDS 9216 Switch
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78-16165-01
If mounting the switch in a cabinet that has solid front and back doors:
The distance between the side edge of the chassis and the side of the
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cabinet should be at least 2.5 inches (6.4 cm). No sizeable flow
obstructions should be in the way of the chassis side air intake or exhaust
vents.
The cabinet depth should be 36 - 42 inches (91.4 - 106.7 cm) to allow
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adequate airflow. If cable management brackets are used, the front
mounting rails of the cabinet should be offset from the front door by 6
inches (15.2 cm) minimum.
The distance between the outside face of the front mounting rail and the
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outside face of the back mounting rail should be 24 - 34 inches (61.0 -
86.4 cm) to allow for rear bracket installation, with a recommended
distance of 25 inches (63.5 cm).
A fan tray in the top of the cabinet to exhaust the heated air, with a
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minimum of 500 CFM of airflow exiting the top of the cabinet.
Bottom to top air cooling scheme with the bottom of the cabinet open for
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air intake. There should be a minimum of 150 square inches (968 square
cm) of open area at the floor air intake of the cabinet. The lowest piece
of equipment should be installed a minimum of 1.75 inches (4.4 cm)
above the floor openings to prevent blocking the floor intake.
For all mounting options, the chassis should be adequately grounded.
Grounding the chassis is recommended. If the switch is not mounted in a
grounded rack, we recommend connecting both the system ground on the
chassis and the power supply ground to an earth ground.
Use the following screw torques:
Captive screws: 4 in-lbs
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– M3 screws: 4 in-lbs
M4 screws: 12in-lbs
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10-32 screws: 20in-lbs
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– 12-24 screws: 30in-lbs
Cisco MDS 9216 Switch Hardware Installation Guide
Pre-Installation
2-5