Juniper Networks EX4200 사용자 설명서

Cabinet Requirements for EX3200 and EX4200 Switches

You can mount the switch in a cabinet that contains a 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

Table 28 on page 89 provides the cabinet requirements and specifications for the
switch.

Table 28: Cabinet Requirements and Specifications for the Switch

Guidelines

Cabinet Requirement

■

The minimum cabinet size for accommodating a switch
is 23.62 in. (60 cm) wide and 30 in. (76.2 cm) deep.
Large cabinets improve airflow and reduce the chance
of overheating. To accommodate a single switch in a
two-post rack or four-post rack, the cabinet must be at
least 1 U high.

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 (

■

With adequate cooling air and airflow clearance, you
can mount 42 switches in a cabinet with a two-post or
four-post rack that has at least 42 U of usable vertical
space. In all cases, the rack must meet the strength
requirements to support the weight.

■

The minimum total clearance inside the cabinet is
29.2 in. (74.17 cm) between the inside of the front door
and the inside of the rear door.

Cabinet size and clearance

Cabinet Requirements for EX3200 and EX4200 Switches

■

89

Chapter 5: Mounting and Clearance Requirements