Juniper Networks EX8208 User Manual
Page 124
Table 39: Rack Requirements and Specifications for an EX8208 Switch
Guidelines
Rack Requirement
Use a four-post rack or a two-post rack. You can mount the switch on any four-post
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 (
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 type and mounting bracket hole
spacing
•
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 (
•
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)
•
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.
Rack size and strength
•
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.
Rack connection to the building
structure
Copyright © 2010, Juniper Networks, Inc.
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Complete Hardware Guide for EX8208 Ethernet Switches