Allow a minimum of 48 inches (122 cm) in front of the rack and 30 inches (76 cm) behind the rack.
When using a relay (two-post) rack, provide a minimum of 24 inches (61 cm) of space behind the
mounted equipment. Extra room on each side is optional.
Warning
Extreme Networks switches do not have a switch for turning power to the unit on and o. For
systems using an AC power supply, power to the switch is disconnected by removing the wall
plug from the electrical outlet.
Be sure that cables and other equipment do not block the switch's air intake or outflow.
Depending on other conditions in the equipment room, it may be possible to install the switches closer
to each other; consult your Extreme Networks Customer Support representative for guidance.
Securing the Rack
The rack should be attached to the wiring closet floor with 9.5 mm (3/8 in) lag screws or equivalent
hardware. The floor under the rack should be level within 5 mm (3/16 in). Use a floor-leveling cement
compound if necessary or bolt the racks to the floor as shown.
Figure 29: Properly Secured Rack
Brace open equipment racks if the channel thickness is less than 6.4 mm (1/4 in).
Evaluating and Meeting Cable Requirements
Use professional consultants for site planning and cabling.
The Building Industry Consulting Service International (BICSI) Registered Communications Distribution
Designer (RCDD), which is globally recognized as a standard in site planning and cabling, can be used.
For information, visit www.bicsi.org.
Labeling Cables and Keeping Accurate Records
A reliable cable labeling system is essential when planning and installing a network.
Site Preparation
Securing the Rack
ExtremeSwitching 5420 Series Hardware Installation Guide 39
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