Juniper EX8208 User manual

Mounting an EX8208 Switch on a Rack or Cabinet
The EX8208 switch ships installed with front-mounting brackets on the chassis for
mounting the switch on a 19-in. equipment rack or cabinet. The switch also comes
with adjustable mounting brackets to support it in the rack.
In a four-post rack, the switch consumes 14 U without the optional power cord tray
and 15 U with the optional power cord tray. In a two-post rack, the power cord tray
is mandatory. The switch with the power cord tray consumes 15 U. You can mount
up to three switches on a 42 U four-post rack or on a 45 U two-post rack provided
that the racks meet the strength requirements to support the combined weight of
the switches.
NOTE: If you are mounting multiple switches on a rack or cabinet, mount a switch
on the bottom of the rack or cabinet first and then mount the rest of the switches
from bottom to top.
WARNING: If you install the switch without using a mechanical lift, at least three
people must be available to lift the unloaded switch chassis (all components except
the backplane removed) onto the adjustable mounting brackets (in a four-post rack
or cabinet) or onto the lip of the power cord tray (in a two-post rack or cabinet).
CAUTION: Do not install line cards in the chassis until after you mount the chassis
securely on a rack or cabinet.
Before mounting an EX8208 switch on a rack or cabinet:
■Verify that the site meets the requirements described in Site Preparation Checklist
for an EX8200 Switch.
■Place the rack or cabinet in its permanent location, allowing adequate clearance
for airflow and maintenance, and secure it to the building structure. See Clearance
Requirements for Airflow and Hardware Maintenance for an EX8208 Switch for
detailed information.
■Read General Safety Guidelines and Warnings for EX Series Switches, with
particular attention to Chassis Lifting Guidelines for EX8200 Switches.
■Remove the switch from the shipping box (see Unpacking an EX8200 Switch).
Ensure that you have the following parts and tools available to mount the switch on
a rack or cabinet:
■A Phillips (+) screwdriver, number 2 or number 3, depending on the size of
your rack mounting screws, for mounting the switch on a rack or cabinet
■A Phillips (+) screwdriver, number 1, to remove the power supplies from the
chassis if you are mounting the switch without using a mechanical lift
Mounting an EX8208 Switch on a Rack or Cabinet ■1

■24 mounting screws appropriate for your rack
To mount the EX8208 switch on a rack or cabinet (see Figure 1 and Figure 2):
1. In a four-post rack or cabinet, install the adjustable mounting brackets at the
desired position (see Installing Adjustable Mounting Brackets in a Rack or Cabinet
for an EX8200 Switch).
In a two-post rack or cabinet, install the power cord tray (see Installing the Power
Cord Tray in a Rack or Cabinet for an EX8200 Switch). The power cord tray is
optional for four-post rack installation.
2. Lift the chassis into the rack using a mechanical lift. For instructions on how to
install the chassis using a mechanical lift, see Mounting an EX8208 Switch on a
Rack or Cabinet Using a Mechanical Lift.
In a four-post rack, place the chassis on the adjustable mounting brackets. In a
two-post rack, place the front edge of the chassis on the lip of the power cord
tray with at least three people supporting the rear of the chassis until you can
bolt the chassis into the rack.
If a mechanical lift is not available, remove all components and ensure that at
least three people are available to lift the empty chassis into the rack. For
instructions on how to install the chassis without using a mechanical lift, see
Mounting an EX8208 Switch on a Rack or Cabinet Without Using a Mechanical
Lift.
3. Insert 24 mounting screws appropriate for your rack (not provided) into the
aligned holes. Use the appropriate Phillips (+) screwdriver to tighten the screws
to the rack or cabinet rail.
2■Mounting an EX8208 Switch on a Rack or Cabinet

Figure 1: Installing an EX8208 Switch in a Two-Post Rack
Figure 2: Installing an EX8208 Switch in a Four-Post Rack
Related Topics Connecting AC Power to an EX8200 Switch■
■Rack Requirements for an EX8208 Switch
■Cabinet Requirements and Specifications for an EX8208 Switch
Published: 2009-07-15
Mounting an EX8208 Switch on a Rack or Cabinet ■3