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Installing the Cisco MDS 9220i Switch
Step 2
Repeat Step 1 with the other shelf brackets.
Step 3
Verify that the shelf brackets are at the same height (using the level or tape measure, as desired).
Step 4
Attach the crossbar to the shelf brackets, as shown in
4, using the 10-32 screws.
Step 5
Insert the slider posts into the shelf brackets, as shown in
page
4. Attach them to the rear rack-mounting posts, using a minimum of four 12-24 or 10-24 screws.
Preinstallation Guidelines
Airflow Considerations
The switch comes with fan modules that have port-side intake or port-side exhaust and power supply units
that have port-side intake, port-side exhaust, or bidirectional airflow for cooling the switch. If you are
positioning the port-end of the switch in a cold aisle, make sure that the switch has a port-side intake fan and
power supply units with red colorings. If you are positioning the fan and power supply units in a cold aisle,
make sure that the switch has port-side exhaust fan and power supply units with blue colorings. Bidirectional
power supply modules with white coloring can be used with either of these options. All fan modules and
power supply units must have the same direction of airflow.
Connection Guidelines for AC Powered Systems
To connect to the Cisco MDS 9220i switch AC power supply units to the site power source, follow these
guidelines:
• Each power supply should have its own dedicated branch circuit.
• The AC power receptacles that are used to plug in the chassis must be the grounding type. The grounding
Installation Guidelines
Follow these guidelines when installing the Cisco MDS 9220i switch:
• Plan your site configuration and prepare the site before installing the switch.
• Ensure that there is adequate space around the switch to allow for servicing the switch and for adequate
• Ensure that you are positioning the switch in a rack so that it intakes cold air from the cold aisle and
• Ensure that the chassis is adequately grounded. If the switch is not mounted in a grounded rack, we
• Ensure that circuits are sized according to local and national codes.
conductors that connect to the receptacles should connect to protective earth ground in the service
equipment.
airflow.
exhausts hot air to the hot aisle.
recommend that you connect both the system ground on the chassis and the site power ground to an earth
ground.
Figure 2: Installing the Shelf Bracket Kit into an EIA Rack, on page
Figure 2: Installing the Shelf Bracket Kit into an EIA Rack, on
Installing the Cisco MDS 9220i Switch
Preinstallation Guidelines
5
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