Juniper QFX5120 Series User manual

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.

ii

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

1

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

2

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

iv

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

3

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

v

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

4

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

5

Troubleshooting QFX5120 Components | 145

Understanding Alarms | 145

Interface Alarm Messages | 146

Creating an Emergency Boot Device | 147

vi

Contacting Customer Support and Returning the Chassis or Components

6

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

7

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

ix

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.

xi

If the example configuration contains the top level of the hierarchy (or multiple hierarchies), the example

is a full example. In this case, use the load merge command.

If the example configuration does not start at the top level of the hierarchy, the example is a snippet. In

this case, use the load merge relative command. These procedures are described in the following sections.

Merging a Full Example

To merge a full example, follow these steps:

1. From the HTML or PDF version of the manual, copy a configuration example into a text file, save the

file with a name, and copy the file to a directory on your routing platform.

For example, copy the following configuration to a file and name the file ex-script.conf. Copy the

ex-script.conf file to the /var/tmp directory on your routing platform.

system {

scripts {

commit {

file ex-script.xsl;

}

interfaces {

fxp0 {

disable;

unit 0 {

family inet {

address 10.0.0.1/24;

}

2. Merge the contents of the file into your routing platform configuration by issuing the load merge

configuration mode command:

[edit]

user@host# load merge /var/tmp/ex-script.conf

load complete

xii

Merging a Snippet

To merge a snippet, follow these steps:

1. From the HTML or PDF version of the manual, copy a configuration snippet into a text file, save the

file with a name, and copy the file to a directory on your routing platform.

For example, copy the following snippet to a file and name the file ex-script-snippet.conf. Copy the

ex-script-snippet.conf file to the /var/tmp directory on your routing platform.

commit {

file ex-script-snippet.xsl; }

2. Move to the hierarchy level that is relevant for this snippet by issuing the following configuration mode

command:

[edit]

user@host# edit system scripts

[edit system scripts]

3. Merge the contents of the file into your routing platform configuration by issuing the load merge

relative configuration mode command:

[edit system scripts]

user@host# load merge relative /var/tmp/ex-script-snippet.conf

load complete

For more information about the load command, see CLI Explorer.

Documentation Conventions

Table 1 on page xiv defines notice icons used in this guide.

xiii

Table 1: Notice Icons

DescriptionMeaningIcon

Indicates important features or instructions.Informational note

Indicates a situation that might result in loss of data or hardware

damage.

Caution

Alerts you to the risk of personal injury or death.Warning

Alerts you to the risk of personal injury from a laser.Laser warning

Indicates helpful information.Tip

Alerts you to a recommended use or implementation.Best practice

Table 2 on page xiv defines the text and syntax conventions used in this guide.

Table 2: Text and Syntax Conventions

ExamplesDescriptionConvention

To enter configuration mode, type

the configure command:

user@host> configure

Represents text that you type.Bold text like this

user@host> show chassis alarms

No alarms currently active

Represents output that appears on

the terminal screen.

Fixed-width text like this

•

A policy term is a named structure

that defines match conditions and

actions.

•

Junos OS CLI User Guide

•

RFC 1997, BGP Communities

Attribute

•

Introduces or emphasizes important

new terms.

•

Identifies guide names.

•

Identifies RFC and Internet draft

titles.

Italic text like this

xiv

Table 2: Text and Syntax Conventions (continued)

ExamplesDescriptionConvention

Configure the machine’s domain

name:

[edit]

root@# set system domain-name

domain-name

Represents variables (options for

which you substitute a value) in

commands or configuration

statements.

Italic text like this

•

To configure a stub area, include

the stub statement at the [edit

protocols ospf area area-id]

hierarchy level.

•

The console port is labeled

CONSOLE.

Represents names of configuration

statements, commands, files, and

directories; configuration hierarchy

levels; or labels on routing platform

components.

Text like this

stub <default-metric metric>;Encloses optional keywords or

variables.

< > (angle brackets)

broadcast | multicast

(string1 | string2 | string3)

Indicates a choice between the

mutually exclusive keywords or

variables on either side of the symbol.

The set of choices is often enclosed

in parentheses for clarity.

| (pipe symbol)

rsvp { # Required for dynamic MPLS

only

Indicates a comment specified on the

same line as the configuration

statement to which it applies.

# (pound sign)

community name members [

community-ids ]

Encloses a variable for which you can

substitute one or more values.

[ ] (square brackets)

[edit]

routing-options {

static {

route default {

nexthop address;

retain;

}

Identifies a level in the configuration

hierarchy.

Indention and braces ( { } )

Identifies a leaf statement at a

configuration hierarchy level.

; (semicolon)

GUI Conventions

xv

Table 2: Text and Syntax Conventions (continued)

ExamplesDescriptionConvention

•

In the Logical Interfaces box, select

All Interfaces.

•

To cancel the configuration, click

Cancel.

Represents graphical user interface

(GUI) items you click or select.

Bold text like this

In the configuration editor hierarchy,

select Protocols>Ospf.

Separates levels in a hierarchy of

menu selections.

> (bold right angle bracket)

Documentation Feedback

We encourage you to provide feedback so that we can improve our documentation. You can use either

of the following methods:

•

Online feedback system—Click TechLibrary Feedback, on the lower right of any page on the Juniper

Networks TechLibrary site, and do one of the following:

•

Click the thumbs-up icon if the information on the page was helpful to you.

•

Click the thumbs-down icon if the information on the page was not helpful to you or if you have

suggestions for improvement, and use the pop-up form to provide feedback.

•

E-mail—Send your comments to [email protected]. Include the document or topic name,

URL or page number, and software version (if applicable).

Requesting Technical Support

Technical product support is available through the Juniper Networks Technical Assistance Center (JTAC).

If you are a customer with an active Juniper Care or Partner Support Services support contract, or are

xvi

covered under warranty, and need post-sales technical support, you can access our tools and resources

online or open a case with JTAC.

•

JTAC policies—For a complete understanding of our JTAC procedures and policies, review the JTAC User

Guide located at https://www.juniper.net/us/en/local/pdf/resource-guides/7100059-en.pdf.

•

Product warranties—For product warranty information, visit https://www.juniper.net/support/warranty/.

•

JTAC hours of operation—The JTAC centers have resources available 24 hours a day, 7 days a week,

365 days a year.

Self-Help Online Tools and Resources

For quick and easy problem resolution, Juniper Networks has designed an online self-service portal called

the Customer Support Center (CSC) that provides you with the following features:

•

Find CSC offerings: https://www.juniper.net/customers/support/

•

Search for known bugs: https://prsearch.juniper.net/

•

Find product documentation: https://www.juniper.net/documentation/

•

Find solutions and answer questions using our Knowledge Base: https://kb.juniper.net/

•

Download the latest versions of software and review release notes:

https://www.juniper.net/customers/csc/software/

•

Search technical bulletins for relevant hardware and software notifications:

https://kb.juniper.net/InfoCenter/

•

Join and participate in the Juniper Networks Community Forum:

https://www.juniper.net/company/communities/

•

Create a service request online: https://myjuniper.juniper.net

To verify service entitlement by product serial number, use our Serial Number Entitlement (SNE) Tool:

https://entitlementsearch.juniper.net/entitlementsearch/

Creating a Service Request with JTAC

You can create a service request with JTAC on the Web or by telephone.

•

Visit https://myjuniper.juniper.net.

•

Call 1-888-314-JTAC (1-888-314-5822 toll-free in the USA, Canada, and Mexico).

For international or direct-dial options in countries without toll-free numbers, see

https://support.juniper.net/support/requesting-support/.

xvii

1

CHAPTER

Overview

QFX5120 System Overview | 21

QFX5120 Chassis | 32

QFX5120 Cooling System | 41

QFX5120 Power System | 49

QFX5120 System Overview

IN THIS SECTION

QFX5120 Switches Hardware Overview | 21

QFX5120 Switch Models | 28

Identifying QFX5120 Switch Models | 30

Chassis Physical Specifications for QFX5120 Switches | 31

Field-Replaceable Units in QFX5120 Switches | 32

QFX5120 Switches Hardware Overview

IN THIS SECTION

Benefits of the QFX5120 Switch | 22

QFX5120 Hardware | 22

System Software | 27

QFX5120 Power System | 27

The QFX5120 switch delivers low latency, rich Layer 2 and Layer 3 features, and offer ideal data center

top-of-rack and aggregation switches for enterprise multicloud deployments. Featuring Layer 3 gateway

capabilities for routing between virtualized and bare-metal servers, the QFX5120 is designed for extremely

agile data centers that demand support for overlay and underlay network architectures. The QFX5120

includes native 25-Gigabit Ethernet (fiber only) and 100-Gigabit Ethernet fixed-configuration options with

rich L2, L3, Ethernet VPN (EVPN), and MPLS features. In addition to a high-throughput Packet Forwarding

Engine (PFE), the performance of the QFX5120 control plane is with a powerful 2.2 GHz quad-core Intel

CPU with 16 GB of memory and 64 GB SSD storage.

The QFX5120 line of switches includes two compact, 1-U platforms that provide wire-speed packet

performance, very low latency, and a rich set of Junos OS features. The native 25-GbE with 100-GbE

uplink ports on QFX5120-48Y, combined with 32 ports of 100-GbE on the 1-Unit QFX5120-32C, also

make the QFX5120 switch ideally suited for spine-and-leaf network deployments.

21

Two variants of the QFX5120 switches are available— 32-port and 48-port switches, with AC and DC

power supplies and with different airflow directions. The QFX5120-48Y switch offers two models featuring

AC power supplies with front-to-back or back-to-front airflow, and two models featuring DC power supplies

with front-to-back or back-to-front airflow. The QFX5120-32C switch offers two models featuring AC

power supplies with front-to-back or back-to-front airflow.

NOTE: The QFX5120-32C switch currently supports only AC power supply.

Benefits of the QFX5120 Switch

EVPN-VXLAN campus architecture—The QFX5120 switch extends EVPN-VXLAN beyond the data center,

thus providing customers the building blocks for an enterprise-wide fabric. The EVPN-VXLAN protocol is

suitable for campus architectures because it provides Layer 3 transport with Layer 2 capabilities that allow

enterprises to evolve, while also taking into consideration legacy applications. QFX5120 also offers core

aggregation capabilities aimed at enterprises with campus networks that want a compact and highly scalable

solution.

Industry-leading 25-Gbps and 100-Gbps wire speeds: The QFX5120 Switch offers industry-leading high

density 25-Gbps and 100-Gbps wire speeds that support 48 ports at 100-Gbps or 48 ports at 25-Gbps,

and 8 100-Gbps uplink ports.

Common data center protocols: The QFX5120 also uses data center network protocols. The network

protocols used in the QFX5120 are the Ethernet VPN (EVPN) and the Virtual Extensible LAN (VXLAN).

Engineers typically use it with the Border Gateway Protocol and the VXLAN encapsulation protocol which

creates an overlay network on an existing Layer 3 infrastructure. As a result, the same engineering team

can manage the data center and the campus.

QFX5120 Hardware

The QFX5120 delivers low-latency, native 25-GbE, rich Layer 2 and Layer 3 features, VXLAN overlay

support, and 100GbE uplinks, making it the ideal switch for access and top-of-rack deployments.

Two variants of QFX5120 switches are available, QFX5120-32C and QFX5120-48Y.

Figure 1 on page 22 shows the front view of the QFX5120-32C switch.

Figure 1: QFX5120-32C - Front View

22

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