Cabinet Requirements For Qfx5120 Switches - Juniper QFX5120 Series Hardware Manual

Table 27: Rack Requirements for the QFX5120 Switch (continued)
Rack Requirement
Mounting bracket hole spacing
Rack size and strength
Rack connection to building structure

Cabinet Requirements for QFX5120 Switches

You can mount the QFX5120 switch in a cabinet that contains a four-post 19-in. rack as defined in Cabinets,
Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry
Association.
Cabinet requirements consist of:
Cabinet size and clearance
Cabinet airflow requirements
Guidelines
The holes in the mounting 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.
Ensure that the rack is a 19-in. rack as defined in Cabinets, Racks, Panels,
and Associated Equipment (document number EIA-310–D) published by
the Electronics Components Industry Association (http://www.ecianow.org/).
Ensure that the rack is one of the following standard depth:
23.6 in. (600 mm)
30.0 in. (762 mm)
31.5 in. (800 mm)
Ensure that the rack rails are spaced widely enough to accommodate the
external dimensions of the switch chassis. The outer edges of the
front-mounting brackets extend the width to 19 in. (48.26 cm).
Either side of the switch needs to be mounted flush with the rack and still
adjustable for racks with different depths. The front and rear rack rails must
be spaced between 23.62 in. (600 mm) and 31.5 in. (800 mm) 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.
Secure the rack to the building structure.
If earthquakes are a possibility in your geographical area, secure the rack
to the floor.
Secure the rack to the ceiling brackets as well as wall or floor brackets for
maximum stability.
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