Juniper QFX5120 Series Installation instructions

QFX5120 Switch Hardware Guide
Published
2019-10-15

Juniper Networks, Inc.
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Sunnyvale, California 94089
USA
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www.juniper.net
Juniper Networks, the Juniper Networks logo, Juniper, and Junos are registered trademarks of Juniper Networks, Inc. in
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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
Copyright © 2019 Juniper Networks, Inc. All rights reserved.
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)
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(“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.
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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
isafull 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