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Rack Requirements for a QFX3500 Device

A QFX3500 device is designed to be installed on four-post racks.

Rack requirements consist of:

Rack type
Mounting bracket hole spacing
Rack size and strength
Rack connection to the building structure

Table 1 provides the rack requirements and specifications for the QFX3500 device.

Table 1: Rack Requirements for the QFX3500 Device
Rack Requirement	Guidelines
Rack type	Use a four-post rack. You can mount the device on a four-post rack that provides bracket holes or hole patterns 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 defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association.
Mounting bracket hole spacing	The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the device 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. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association. Ensure that the rack rails are spaced widely enough to accommodate the device chassis’ external dimensions. The outer edges of the front-mounting brackets extend the width to 19 in. (48.26 cm). The front and rear rack rails must be spaced between 28 in. (71.1 cm) and 36 in. (91.4 cm) front-to-back. The rack must be strong enough to support the weight of the device. Ensure that the spacing of rails and adjacent racks allows for proper clearance around the device and rack.
Rack connection to building structure	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.