Juniper Networks manual Rack Requirements and Specifications for an EX8208 Switch

Complete Hardware Guide for EX8208 Ethernet Switches

Table 39: Rack Requirements and Specifications for an EX8208 Switch

Rack Requirement	Guidelines
Rack type and mounting bracket hole	Use a four-post rack or a two-post rack. You can mount the switch on any four-post
spacing	or two-post rack that provides bracket holes or hole patterns spaced at 1 U (1.75
	in./4.44 cm) increments and that meets the size and strength requirements specified
	in this table.
	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 (http://www.eia.org).
	You can stack three EX8208 switches in a four-post rack that has at least 42 U; if you
	install the optional power cord tray, a minimum of 45 U are required. You can stack
	three EX8208 switches in a two-post rack that has 45 U (installing the power cord
	tray is mandatory for two-post rack installations). In all cases, the rack must meet the
	strength requirements to support the weight.
Rack size and strength	• 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
	Industry Association (http://www.eia.org).
	• Ensure that the rack is one of the following standard lengths:
	• 23.62 in. (600 mm)
	• 30.0 in. (762 mm)
	• 21.5 in. (546 mm)

Rack connection to the building structure

•Ensure that the rack rails are spaced widely enough to accommodate the EX8208 switch chassis' external dimensions of 24.25 in. (61.6 cm) height, 17.25 in. (43.815 cm) width, 20 in. (50.8 cm) depth. The outer edges of the front-mounting brackets extend the width to 19 in. (48.3 cm).

•The EX8208 switch chassis height of 24.25 in. (61.6 cm) is approximately 14 U. If you install the power cord tray (optional for four-post rack installations, mandatory for two-post rack installations), the chassis and power cord tray consume 15 U.

•The rack must be strong enough to support the weight of the fully configured switch. A fully configured EX8208 switch weighs up to 284 lb (130 kg). If you stack three fully configured EX8208 switches in one rack, that rack must support up to 852 lb (487 kg).

•Ensure that the spacing of rails and adjacent racks allows for the proper clearance around the switch and rack as specified in “Clearance Requirements for Airflow and Hardware Maintenance for an EX8208 Switch” on page 101.

•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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