Table 30: Rack Requirements for the QFX5200
Rack Requirement Guidelines
Rack type Use a four-post rack that provides bracket holes or hole paerns spaced at 1 U (1.75 in. or
4.45 cm) increments and that meets the size and strength requirements to support the
weight.
A U is the standard rack unit dened in
Cabinets, Racks, Panels, and Associated Equipment
(document number EIA-310–D) published by the Electronics Industry Associaon.
Mounng bracket
hole spacing
The holes in the mounng brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the
switch can be mounted in any rack that provides holes spaced at that distance.
Rack size and
strength
• Ensure that the rack complies with the standards for a 19-in. or 23-in. rack as dened in
Cabinets, Racks, Panels, and Associated Equipment
(document number EIA-310–D)
published by the Electronics Industry Associaon.
• A 600-mm rack as dened in the four-part
Equipment Engineering (EE); European
telecommunicaons standard for equipment pracce
(document numbers ETS 300
119-1 through 119-4) published by the European Telecommunicaons Standards
Instute (href="hp://www.etsi.org">hp://www.etsi.org).
The horizontal spacing between the rails in a rack that complies with this standard is
usually wider than the device's mounng brackets, which measure 19 in. (48.26 cm) from
outer edge to outer edge. Use approved wing devices to narrow the opening between
the rails as required.
•
Ensure that the rack rails are spaced widely enough to accommodate the switch chassis’
external dimensions. The outer edges of the front-mounng brackets extend the width
to 19 in. (48.26 cm).
•
For four-post installaons, the front and rear rack rails must be spaced between 23.25
in. (59.1 cm) to 30.6 in. (77.7 cm) front-to-back.
• The rack must be strong enough to support the weight of the switch.
• Ensure that the spacing of rails and adjacent racks allows for proper clearance around
the switch and rack.
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