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Rack Requirements for a QFX5100 Device

All QFX5100 devices are designed to be installed on four-post racks. The QFX5100-96S device can also be installed on two-post racks.

Rack requirements consist of:

Rack type
Mounting bracket hole spacing
Rack size and strength

Table 1 provides the rack requirements and specifications for the QFX5100 device.

Table 1: Rack Requirements for the QFX5100 Device
Rack Requirement	Guidelines
Rack type (all product SKUs)	Use 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.
Rack type (QFX5100-96S only)	Use a two-post or 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.
Mounting bracket hole spacing (all product SKUs)	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.
Rack size and strength (all product SKUs)	Ensure that the rack complies with the standards for a 19-in. or 23-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics Industry Association. A 600-mm rack as defined in the four-part Equipment Engineering (EE); European telecommunications standard for equipment practice (document numbers ETS 300 119-1 through 119-4) published by the European Telecommunications Standards Institute. The horizontal spacing between the rails in a rack that complies with this standard is usually wider than the device's mounting 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-mounting brackets extend the width to 28.5 in. (72.4 cm) to 31.5 in. (80 cm). For four-post installations, the front and rear rack rails must be spaced between 28.5 in. (72.4 cm) to 31.5 in. (80 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.
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.