Table 60: Four-Post Rack or Cabinet Mounting Hole Locations (continued)
Small
Shelf
Spacer
Bars
Large
ShelfDistance Above U DivisionHole
X7.86 U13.76 in. (34.9 cm)24
X4.86 U8.51 in. (21.6 cm)15
X1.86 U3.26 in. (8.3 cm)6
X0.86 U1.51 in. (3.8 cm)3
XX0.50 U0.88 in. (2.2 cm)2
X0.14 U0.25 in. (0.6 cm)1
This topic describes these tasks:
1.
Installing Cage Nuts for QFX3008-I Interconnect Device Four-Post Rack or Cabinet
Mounting on page 229
2.
Installing the Small Mounting Shelf for QFX3008-I Interconnect Device Four-Post
Rack or Cabinet Mounting on page 229
3.
Installing the Large Mounting Shelf and Spacer Bars for QFX3008-I Interconnect
Device Four-Post Rack or Cabinet Mounting on page 230
4.
Removing the Adjustable Center-Mounting Brackets for QFX3008-I Interconnect
Device Four-Post Rack or Cabinet Mounting on page 231
Installing Cage Nuts for QFX3008-I Interconnect Device Four-Post Rack or Cabinet Mounting
For racks without threaded holes, you must install cage nuts on the rack or cabinet rails
in the locations specified in Table 60 on page 228 (an X indicates a mounting hole location).
Before you begin, ensure that you have 22 cage nuts appropriate for your rack or cabinet.
To install the cage nuts in the proper locations:
1. On the front rack or cabinet, install cage nuts in the holes specified in Table 60 on
page 228 for the large shelf and the spacer bars.
2. On the rear rack or cabinet, install cage nuts in the holes specified in Table 60 on
page 228 for the small shelf.
Installing the Small Mounting Shelf for QFX3008-I Interconnect Device Four-Post Rack or
Cabinet Mounting
To mount the chassis on a four-post rack or cabinet, you must first install the mounting
shelves and spacer bars on the rack or cabinet.
229Copyright © 2012, Juniper Networks, Inc.
Chapter 19: Installing a QFX3008-I Interconnect Device
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