Juniper QFX5120 Series Istruzioni per l'installazione

QFX5120 Switch Hardware Guide

Published

2019-10-15

Juniper Networks, Inc.

1133 Innovation Way

Sunnyvale, California 94089

USA

408-745-2000

www.juniper.net

Juniper Networks, the Juniper Networks logo, Juniper, and Junos are registered trademarks of Juniper Networks, Inc. in

the United States and other countries. All other trademarks, service marks, registered marks, or registered service marks

are the property of their respective owners.

Juniper Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the right

to change, modify, transfer, or otherwise revise this publication without notice.

QFX5120 Switch Hardware Guide

The information in this document is current as of the date on the title page.

YEAR 2000 NOTICE

Juniper Networks hardware and software products are Year 2000 compliant. Junos OS has no known time-related

limitations through the year 2038. However, the NTP application is known to have some difficulty in the year 2036.

END USER LICENSE AGREEMENT

The Juniper Networks product that is the subject of this technical documentation consists of (or is intended for use with)

Juniper Networks software. Use of such software is subject to the terms and conditions of the End User License Agreement

(“EULA”) posted at https://support.juniper.net/support/eula/. By downloading, installing or using such software, you

agree to the terms and conditions of that EULA.

Table of Contents

About the Documentation | xi

Documentation and Release Notes | xi

Using the Examples in This Manual | xi

Merging a Full Example | xii

Merging a Snippet | xiii

Documentation Conventions | xiii

Documentation Feedback | xvi

Requesting Technical Support | xvi

Self-Help Online Tools and Resources | xvii

Creating a Service Request with JTAC | xvii

Overview

QFX5120 System Overview | 21

QFX5120 Switches Hardware Overview | 21

Benefits of the QFX5120 Switch | 22

QFX5120 Hardware | 22

System Software | 27

QFX5120 Power System | 27

QFX5120 Switch Models | 28

Identifying QFX5120 Switch Models | 30

Chassis Physical Specifications for QFX5120 Switches | 31

Field-Replaceable Units in QFX5120 Switches | 32

QFX5120 Chassis | 32

QFX5120 Cooling System | 33

QFX5120 Models with Front-to-Back Airflow | 33

QFX5120 Models with Back-to-Front Airflow | 34

Positioning the Switch | 36

iii

QFX5120 Fan Module Status | 36

Management Port LEDs on QFX5120 Switches | 37

Network Port LEDs on QFX5120 Switches | 38

QFX5120 Cooling System | 41

QFX5120 Cooling System | 42

QFX5120 Models and Airflow Direction | 43

QFX5120 Models with Front-to-Back Airflow | 45

QFX5120 Models with Back-to-Front Airflow | 47

Positioning the Switch | 48

QFX5120 Fan Module Status | 49

QFX5120 Power System | 49

AC Power Supply in QFX5120 Switches | 50

AC Power Supply Specifications for QFX5120 Switches | 50

AC Power Supply Airflow | 51

AC Power Supply Specifications for QFX5120 Switches | 52

AC Power Cord Specifications for QFX5120 Switches | 53

AC Power Supply LEDs in QFX5120 Switches | 55

DC Power Supply in QFX5120 Switches | 57

Characteristics of a DC Power Supply | 58

DC Power Supply Airflow | 59

QFX5120 DC Power Specifications | 60

DC Power Supply LEDs in QFX5120 Switches | 60

Site Planning, Preparation, and Specifications

Site Preparation Checklist for QFX5120 Switches | 65

QFX5120 Site Guidelines and Requirements | 66

Environmental Requirements and Specifications for QFX5120 Switches | 66

General Site Guidelines | 68

Site Electrical Wiring Guidelines | 68

Rack Requirements for QFX5120 Switches | 69

Cabinet Requirements for QFX5120 Switches | 70

Clearance Requirements for Airflow and Hardware Maintenance for QFX5120 Switches | 71

QFX5120 Network Cable and Transceiver Planning | 73

Pluggable Transceivers Supported on QFX5120 Switches | 73

SFP28 Direct Attach Copper Cables for QFX5120 Switches | 74

Cable Specifications | 75

Standards Supported by These Cables | 75

QSFP28 Direct Attach Copper Cables for QFX5120 Switches | 76

Cable Specifications | 76

Section | ?

Cable Specifications for QSFP+ and QSFP28 Transceivers on QFX5120 Switches | 77

Calculating the Fiber-Optic Cable Power Budget for QFX Series Switches | 78

Calculating the Fiber-Optic Cable Power Margin for QFX Series Switches | 79

QFX5120 Management Cable Specifications and Pinouts | 81

Console Port Connector Pinout Information | 81

RJ-45 Management Port Connector Pinout Information | 82

RJ-45 to DB-9 Serial Port Adapter Pinout Information | 83

QSFP+,QSFP28, SFP, SFP+, and SFP28 Port Connector Pinout Information | 83

Initial Installation and Configuration

Unpacking and Mounting the QFX5120 Switch | 91

Unpacking the Switch | 91

Parts Inventory (Packing List) for a QFX5120 Switch | 92

Registering Products—Mandatory for Validating SLAs | 93

Mounting a QFX5120 Switch on Four Posts of a Rack or Cabinet | 93

Connecting the QFX5120 to Power | 98

Connecting Earth Ground to a QFX5120 Switch | 98

Connecting AC Power to a QFX5120 Switch | 99

Connecting DC Power to a QFX5120 Switch | 101

Connecting the QFX5120 to the Network | 106

Installing a Transceiver | 106

Connecting a Fiber-Optic Cable | 109

Connecting the QFX5120 to External Devices | 110

Connecting a Device to a Network for Out-of-Band Management | 110

Connecting a Device to a Management Console by Using an RJ-45 Connector | 111

Configuring Junos OS on the QFX5120 | 112

QFX5120 Default Configuration | 113

Connecting and Configuring a QFX5120 Switch | 113

Maintaining Components

Maintaining the QFX5120 Cooling System | 121

Removing a Fan Module from a QFX5120 Switch | 121

Installing a Fan Module in a QFX5120 Switch | 122

Maintaining the QFX5120 Power System | 124

Removing Power Supply from a QFX5120 Switch | 124

Connecting AC Power to a QFX5120 Switch | 126

Maintaining Transceivers | 129

Removing a Transceiver | 129

Removing a QSFP28 Transceiver | 132

Installing a Transceiver | 134

Installing a QSFP28 Transceiver | 136

Maintaining Fiber-Optic Cables | 138

Connecting a Fiber-Optic Cable | 138

Disconnecting a Fiber-Optic Cable | 139

Maintaining Fiber-Optic Cables | 140

Troubleshooting Hardware

Troubleshooting QFX5120 Components | 145

Understanding Alarms | 145

Interface Alarm Messages | 146

Creating an Emergency Boot Device | 147

Contacting Customer Support and Returning the Chassis or Components

Returning a QFX5120 Chassis or Components | 151

Returning a QFX5120 Switch or Component for Repair or Replacement | 151

Locating the Serial Number on a QFX5120 Switch or Component | 152

Listing the Switch and Components Details with the CLI | 152

Locating the Chassis Serial Number ID Label on a QFX5120 Switch | 152

Locating the Serial Number ID Labels on FRUs in a QFX5120 Switch | 153

Contacting Customer Support to Obtain Return Material Authorization | 154

Packing a QFX5120 Switch or Component for Shipping | 155

Packing a QFX5120 Switch for Shipping | 155

Packing QFX5120 Switch Components for Shipping | 157

Safety and Compliance Information

General Safety Guidelines and Warnings | 161

Definitions of Safety Warning Levels | 162

Qualified Personnel Warning | 164

Warning Statement for Norway and Sweden | 165

Fire Safety Requirements | 165

Fire Suppression | 165

Fire Suppression Equipment | 165

Installation Instructions Warning | 167

Chassis and Component Lifting Guidelines | 167

Restricted Access Warning | 169

Ramp Warning | 171

Rack-Mounting and Cabinet-Mounting Warnings | 171

Grounded Equipment Warning | 176

vii

Radiation from Open Port Apertures Warning | 177

Laser and LED Safety Guidelines and Warnings | 178

General Laser Safety Guidelines | 178

Class 1 Laser Product Warning | 179

Class 1 LED Product Warning | 180

Laser Beam Warning | 181

Maintenance and Operational Safety Guidelines and Warnings | 181

Battery Handling Warning | 183

Jewelry Removal Warning | 184

Lightning Activity Warning | 186

Operating Temperature Warning | 187

Product Disposal Warning | 189

General Electrical Safety Guidelines and Warnings | 190

Action to Take After an Electrical Accident | 191

Prevention of Electrostatic Discharge Damage | 191

AC Power Electrical Safety Guidelines | 193

AC Power Disconnection Warning | 194

DC Power Electrical Safety Guidelines | 195

DC Power Disconnection Warning | 196

DC Power Grounding Requirements and Warning | 198

DC Power Wiring Sequence Warning | 200

DC Power Wiring Terminations Warning | 203

Multiple Power Supplies Disconnection Warning | 206

TN Power Warning | 207

Agency Approvals for QFX5120 Switches | 207

Compliance Statements for EMC Requirements for the QFX Series | 209

QFX 5120 | 209

Canada | 210

viii

European Community | 211

Israel | 211

Japan | 211

Korea | 212

Tawain | 212

United States | 212

Nonregulatory Environmental Standards | 213

About the Documentation

IN THIS SECTION

Documentation and Release Notes | xi

Using the Examples in This Manual | xi

Documentation Conventions | xiii

Documentation Feedback | xvi

Requesting Technical Support | xvi

Use this guide to install hardware and perform initial software configuration, routine maintenance, and

troubleshooting for the QFX5120 switch. After completing the installation and basic configuration

procedures covered in this guide, refer to the Junos OS documentation for information about further

software configuration.

Documentation and Release Notes

To obtain the most current version of all Juniper Networks®technical documentation, see the product

documentation page on the Juniper Networks website at https://www.juniper.net/documentation/.

If the information in the latest release notes differs from the information in the documentation, follow the

product Release Notes.

Juniper Networks Books publishes books by Juniper Networks engineers and subject matter experts.

These books go beyond the technical documentation to explore the nuances of network architecture,

deployment, and administration. The current list can be viewed at https://www.juniper.net/books.

Using the Examples in This Manual

If you want to use the examples in this manual, you can use the load merge or the load merge relative

command. These commands cause the software to merge the incoming configuration into the current

candidate configuration. The example does not become active until you commit the candidate configuration.

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