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3. Remove the router from the shipping container as described in “Unpacking the M120

Router” on page 113.

4. Install the mounting hardware as described in “Installing the Mounting Hardware for

a Front-Mount Four-Post Rack or Cabinet” on page 119, “Installing the Mounting

Hardware for a Front-Mount Open-Frame Rack” on page 121, or “Installing the Mounting

Hardware for a Center-Mount Open-Frame Rack” on page 123.

CAUTION: Before front mounting the router in a rack, have a qualified

technician verify that the rack is strong enough to support the router'sweight

and is adequately supported at the installation site.

To install the router using a lift (see Figure 31 on page 127):

1. Ensure that the rack is in its permanent location and is secured to the building. Ensure

that the installation site allows adequate clearance for both airflow and maintenance.

For details, see “M120 Clearance Requirements for Airflow and Hardware Maintenance”

on page 85.

2. Load the router onto the lift, making sure it rests securely on the lift platform.

3. Using the lift, position the router in front of the rack or cabinet, centering it in front of

the mounting shelves.

4. Lift the chassis approximately 0.75 in. above the surface of the mounting shelves and

position it as close as possible to the shelves.

5. Carefully slide the router onto the mounting shelves so that the bottom of the chassis

and the mounting shelves overlap by approximately two inches.

6. Slide the router onto the mounting shelves until the mounting brackets or

front-mounting flanges contact the rack rails or spacer bars (depending on your type

of installation). The shelves ensure that the holes in the mounting brackets and the

front-mounting flanges of the chassis align with the holes in the rack rails.

7. Move the lift away from the rack.

8. If you are installing the router in a four-post rack or cabinet, install a mounting screw

into each of the holes aligned with the threaded holes in the spacer bars. If you are

M120 Multiservice Edge Router Hardware Guide

Juniper M120 User Manual

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