Juniper QFabric QFX3008-I, Руководство пользователя, Страница: 261 / 472

Because of the chassis size and weight, we require using a mechanical lift to install the
device.
CAUTION: Before mounting the device in a rack, have a qualified technician
verify that the rack is strong enough to support the device’s weight and is
adequately supported at the installation site.
NOTE: In a rack, the chassis occupies 21 U. You can mount two devices on a
42 U rack provided that the racks meet the strength requirements to support
the combined weight of the devices. If you are mounting two devices on a
rack, mount the first device on the bottom of the rack.
Before mounting a QFX3008-I Interconnect device in a rack:
1.
Verify that the site meets the requirements described in “Site Preparation Checklist
for a QFX3008-I Interconnect Device” on page 84 .
2.
Place the rack 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 a QFX3008-I Interconnect Device” on
page 100
for detailed information.
3.
Read “General Safety Guidelines and Warnings” on page 161 , with particular attention
to “Chassis Lifting Guidelines for a QFX3008-I Interconnect Device” on page 175 .
4.
Unpack the device as described in “Unpacking a QFX3008-I Interconnect Device” on
page 224 .
5.
In a four-post rack, install the mounting hardware at the desired position as described
in
“Installing QFX3008-I Interconnect Device Mounting Hardware on Four-Post Racks
or Cabinets” on page 227 . In a two-post rack, install the mounting hardware at the
desired position as described in “Installing QFX3008-I Interconnect Device Mounting
Hardware on Two-Post Racks” on page 231 .
Before you begin, ensure that you have the following parts and tools available to mount
the device in a rack:
•
A mechanical lift with a load capacity of at least 750 lb (341 kg). If you do not have a
lift rated for 750 lb (341 kg), you must remove all components from the chassis and
use a lift rated for at least 250 lb (114 kg). The weight of an empty QFX3008-I
Interconnect device and midplane is approximately 205 lb (93 kg).
•
A Phillips (+) screwdriver, number 2 or number 3, depending on the size of your rack
mounting screws, for mounting the device in a rack
• 14 mounting screws appropriate for your rack if you are installing the device in a
four-post rack
•
18 mounting screws appropriate for your rack if you are installing the device in a
two-post rack
235 Copyright © 2012, Juniper Networks, Inc.
Chapter 19: Installing a QFX3008-I Interconnect Device