JUNIPer EX4100 Ethernet Switch User Guide

: June 3, 2024
: JUNIPer

JUNIPer EX4100 Ethernet Switch

EX4100 and EX4100-F

IN THIS GUIDE

Step 1: Begin | 1
Step 2: Up and Running | 11
Step 3: Keep Going | 15

Step 1: Begin

IN THIS SECTION

Meet the EX4100 and EX4100-F Ethernet Switches | 2
Install the EX4100 and EX4100-F | 6
Power On | 8

In this guide, we provide a simple, three-step path, to quickly get you up and running with your new EX4100 and EX4100-F switch. We’ve simplified and shortened the installation and configuration steps, and included how-to videos. You’ll learn how to install an AC-powered EX4100 and EX4100-F in a two-post rack, power it up, and configure basic settings.

NOTE: Are you interested in getting hands-on experience with the topics and operations covered in this guide? Visit Juniper Networks Virtual Labs and reserve your free sandbox today! You’ll find the Juncos Day One

Experience sandbox in the stand alone category. Because EX switches are not virtualized, in the demonstration, focus on the virtual QFX device. Both the EX and QFX switches are configured with the same Junes commands.

Meet the EX4100 and EX4100-F Ethernet Switches

IN THIS SECTION

EX4100-24P, EX4100-24T, EX4100-48P, and EX4100-48T Switches | 3
EX4100-24MP and EX4100-48MP Switches | 4
EX4100-F-24P, EX4100-F-24T, EX4100-F-48P, and EX4100-F-48T Switches | 4

The Juniper Networks® EX4100 and EX4100-F Ethernet Switches are two separate EX switch model families. The EX4100 switch models have field-replaceable units (FRUs) such as AC/DC power supplies and fan modules. The EX4100-F (fixed-form) switch models have built-in power supplies and fan modules. They are built to be cost-effective solutions for today’s demanding converged data, voice, and video enterprise access network requirements. The 1-RU switches are perfect for campus wiring closet deployments. They offer levels of performance and management previously available only with high-end access switches. The EX4100 and EX4100-F switches have Power over Ethernet (PoE+/PoE++) ports for powering network devices connected to the switches.

NOTE: In this guide, we show you how to install a EX4100 and EX4100-F switch model with an AC power supply. If you need instructions for installing fans and power supplies on EX4100 switch models see the EX4100 and EX4100-F Switch Hardware Guide.

EX4100 switch models are:
Gigabit switch models

EX4100-24P, EX4100-24T, EX4100-48P, and EX4100-48T. See “EX4100-24P, EX4100-24T, EX4100-48P, and EX4100-48T Switches” on page 3.

Multigigabit switch models

EX4100-24MP and EX4100-48MP. See “EX4100-24MP and EX4100-48MP Switches” on page 4.

EX4100-F (fixed-form) switch models are:

EX4100-F-24T, EX4100-F-24P, EX4100-F-48P, and EX4100-F-48T. See “EX4100-F-24P, EX4100-F-24T, EX4100- F- 48P, and EX4100-F-48T Switches” on page 4.

EX4100 and EX4100-F switches are cloud native switches that you can manage in a cloud network by using Juniper Mist™ cloud. EX4100 and EX4100-F switches support Virtual Chassis technology, making it easy for you to scale the network without increasing the number of devices to manage. The EX4100 and EX4100-F switches are available in 24-port and 48-port models, with AC or DC and built-in power supplies, and with different airflow directions.

EX4100-24P, EX4100-24T, EX4100-48P, and EX4100-48T Switches

Here are the port configuration details for the EX4100 switch models:

Models	Access Ports
EX4100-24P, EX4100-24T, EX4100-24T-DC	Twenty four 10/100/1000-Mbps RJ-45

ports, four 10/25 Gbps SFP28 Virtual Chassis ports, and four 1/10 Gbps SFP+ uplink ports on the front panel. EX4100-24P has PoE+ enabled ports.
Models| Access Ports
---|---
EX4100-48P, EX4100-48T, EX4100-48T-AFI, EX4100-48T-DC| Forty eight 10/100/1000-Mbps RJ-45 ports, four 10/25 Gbps SFP28 Virtual Chassis ports, and four 1/10 Gbps SFP+ uplink ports on the front panel. EX4100-48P has PoE+ enabled ports.

EX4100-24MP and EX4100-48MP Switches

JUNIPer-EX4100-Ethernet-Switch-02

Here are the port configuration details for the EX4100 multigigabit switch models:

Models	Access Ports
EX4100-24MP	Eight 1/2.5/5/10 Gbps and sixteen 1 Gbps RJ-45 ports; four 10/25

Gbps SFP28 Virtual Chassis ports, and four 1/10 Gbps SFP+ uplink ports on the front panel. EX4100-24MP has PoE++ enabled ports.
EX4100-48MP| Sixteen 1/2.5 Gbps and thirty-two 1 Gbps RJ-45 ports; four 10/25 Gbps SFP28 Virtual Chassis ports, and four 1/10 Gbps SFP+ uplink ports on the front panel. EX4100-48MP has PoE++ enabled ports.

EX4100-F-24P, EX4100-F-24T, EX4100-F-48P, and EX4100-F-48T Switches

EX4100-F-24P

Here are the port configuration details for the EX4100-F switch models:

Models	Access Ports
EX4100-F-24P and EX4100-F-24T	Twenty four 10/100/1000-Mbps RJ-45 ports, four

1/10 Gbps SFP+ Virtual Chassis ports, and four 10 Gbps SFP+ uplink ports on the front panel. Only EX4100-F-24P has PoE+ enabled ports.
EX4100-F-48P and EX4100-F-48T| Forty eight 10/100/1000-Mbps RJ-45 ports, four 1/10 Gbps SFP+ Virtual Chassis ports, and four 10 Gbps SFP+ uplink ports on the front panel. Only EX4100-F-48P has PoE+ enabled ports.

Install the EX4100 and EX4100-F

IN THIS SECTION

What’s in the Box? | 6
What Else Do I Need? | 6
Install the EX4100 and EX4100-F Switch in a Rack | 7

What’s in the Box?

EX4100 switch with two preinstalled fan modules and one preinstalled power supply unit or EX4100-F switch with built-in fans and power supplies
One AC power cord appropriate for your geographical location.
AC power cord retainer
Eight preinstalled dust covers for SFP ports
Four rubber feet
RJ-45 cable and RJ-45 to DB-9 serial port adapter

What Else Do I Need?

Someone to help you secure the switch to the rack
Mounting screws to secure the EX4100 and EX4100-F switch to the rack
A number two Phillips (+) screwdriver
A serial-to-USB adapter (if your laptop doesn’t have a serial port)
An electrostatic discharge (ESD) grounding strap
A management host such as a laptop or desktop PC
Two M5X10mm screws with washers to secure the grounding lug
A grounding cable: 8 AWG (2 mm²), minimum 90° C wire, or as permitted by the local code, with a Panduit LCD8-14A-L or equivalent lug attached

CAUTION: Have a licensed electrician attach the appropriate grounding lug to the grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage the switch.

Install the EX4100 and EX4100-F Switch in a Rack

Before you start the installation, ensure to review the General Safety Guidelines and Warnings. Also, have someone available to help you secure the switch to the rack.
You can install the EX4100 and EX4100-F switch on a desktop or other level surface, in a two-post or four-post rack, or on a wall. The mounting kit that ships in the box has the brackets you need to install the switch in a two-post rack. We’ll walk you through how to install the switch in a two-post rack.

NOTE: If you want to install the switch in a four-post rack or on the wall , you’ll need to order separate mounting kits. The four-post rack mount kit also has brackets for mounting the switch in a recessed position in the rack.

Place the switch on a flat, stable surface.
Attach an ESD grounding strap to your bare wrist, and connect the strap to the ESD grounding point on the switch.
Lift the switch and position it in the rack. Position the switch so that the AIR IN labels on the fan modules are facing the cold aisle or the AIR OUT labels on the fan modules are facing the hot aisle. Line up the bottom hole in each mounting bracket with a hole in each rack post, ensuring that the switch is level.
While you’re holding the switch in place, have a second person insert and tighten the rack mount screws to secure the mounting brackets to the rack posts. Tighten the screws in the two bottom holes first, and then tighten the screws in the two top holes.
Check that the mounting brackets on each side of the rack are lined up with each other.

Power On

Now you’re ready to connect the EX4100 and EX4100-F switch to a dedicated AC power source. The switch comes with the AC power cord for your geographic location.

Here’s how to connect the switch to AC power:

Attach an ESD grounding strap to your bare wrist, and connect the strap to the ESD grounding point on the switch.
Connect one end of the grounding cable to a proper earth ground, such as the rack .
Place the grounding lug (that’s attached to the grounding cable) over the protective earthing terminal on the rear panel as depicted in the following figures.EX4100 switch models
Secure the grounding lug to the protective earthing terminal using the two M5X10
Dress the grounding cable. Ensure that the cable doesn’t block access to or touch other device components, and that it doesn’t drape where people could trip over it.
Ensure that the power supply is fully inserted in the rear panel of the switch.
For EX4100 switches, on the rear panel, connect the power cord retainer clip to the AC power supply:
Push the end of the power cord retainer strip into the slot above the power cord socket until the strip snaps into place. Ensure that the loop in the retainer strip faces the power cord. The power cord retainer clip extends out of the chassis by 3 in. (7.62 cm).
Press the small tab on the retainer strip to loosen the loop. Slide the loop until there’s enough space to insert the power cord coupler into the power cord socket.
Plug in the power cord to the power cord socket.
Slide the loop toward the power supply until it’s snug against the base of the coupler.
Press the tab on the loop and draw out the loop into a tight circle.
For EX4100-F switches push the power cord into the slot in the adjustment nut of the power cord retainer clip.
Turn the nut until it is tight against the base of the coupler and the slot in the nut is turned 90° from the top of the switch.
If the AC power source outlet has a power switch, turn it off.
Insert the power cord plug into an AC power source outlet.
If the AC power source outlet has a power switch, turn it on. The switch powers on as soon as you plug it in.
For EX4100 switches check to see that the DC OK LED on the power supply is lit steadily green. If not, disconnect the power supply from the power source. You’ll need to replace the power supply (see Maintain the EX4100 Power System in the EX4100 and EX4100-F Switch Hardware Guide).

Step 2: Up and Running

IN THIS SECTION

Plug and Play | 11
Customize the Basic Configuration Using the CLI | 11

Now that the EX4100 and EX4100-F switch is powered on, let’s do some initial configuration to get the switch up and running on your network. It’s simple to provision and manage the switch and other devices on your network. Choose the configuration tool that’s right for you:

Juniper Mist. To use Mist, you’ll need an account on the Mist Cloud Platform. See Overview of Connecting Mist Access Points and Juniper EX Series Switches.
CLI commands

Plug and Play

EX4100 and EX4100-F switches already have factory-default settings configured right out of the box to make them plug-and-play devices. The default settings are stored in a configuration file that:

Sets Ethernet switching and storm control on all interfaces
Sets Power over Ethernet (PoE+/PoE++) on all RJ-45 ports of models that provide PoE+/PoE++
Enables the following protocols:
- Internet Group Management Protocol (IGMP) snooping
- Rapid Spanning Tree Protocol (RSTP)
- Link Layer Discovery Protocol (LLDP)
- Link Layer Discovery Protocol-Media Endpoint Discovery (LLDP-MED)

These settings are loaded as soon as you power on the switch. If you want to see what’s in the factory-default configuration file for your switch, see EX4100 and EX4100-F Default Configuration.

Customize the Basic Configuration Using the CLI

Have these values handy before you begin customizing settings for the switch:

Hostname
Root authentication password
Management port IP address
Default gateway IP address
(Optional) DNS server and SNMP read community

Verify that the serial port settings for your laptop or desktop PC are set to the default:
- Baud rate—9600
- Flow control—None
- Data—8
- Parity—None
- Stop bits—1
- DCD state—Disregard
Connect the console port on the EX4100 and EX4100-F switch to a laptop or desktop PC using the Ethernet cable and the RJ-45 to DB-9 serial port adapter that came in the box with the switch. If your laptop or desktop PC doesn’t have a serial port, use a serial-to-USB adapter (not provided).
At the Junos OS log in prompt, type root to log in. You don’t need to enter a password. If the software boots before you connect your laptop or desktop PC to the console port, you might need to press the Enter key for the prompt to appear.
NOTE: EX Series switches running current Junos software are enabled for Zero Touch Provisioning (ZTP). However, when you configure an EX Series switch for the very first time, you’ll need to disable ZTP. We show you how to do that here. If you see any ZTP-related messages on the console, just ignore them.
- FreeBSD/arm (w) (ttyu0):
- login: root
Start the CLI.
- root@:RE:0% cli
- {master:0} root>
Enter configuration mode.
- {master:0} root> configure
- {master:0}[edit]
- root#
Delete the ZTP configuration. Factory default configurations can vary over different releases. You may see a message that the statement does not exist. Don’t worry, it’s safe to proceed.
- {master:0}[edit]
- root# delete chassis auto-image-upgrade
Add a password to the root administration user account. Enter a plain-text password, an encrypted password, or an SSH public key string. In this example, we show you how to enter a plain-text password.
- {master:0}[edit]
- root# set system root-authentication plain-text-password
- New password: password
- Retype new password: password
Activate the current configuration to stop ZTP messages on the console.
- {master:0}[edit]
- root# commit
- configuration check succeeds commit complete
Configure the hostname.
- {master:0}[edit]
- root# set system host-name name
Configure the IP address and prefix length for the management interface on the switch. As part of this step, you remove the factory default DHCP setting for the management interface.
- {master:0}[edit]
- root# delete interfaces me unit 0 family inept duct
- root# set interfaces me unit 0 family inept address address/prefix-length
Configure the default gateway for the management network.
- {master:0}[edit]
- root# set routing-options static route 0/0 next-hop address
Configure the SSH service. By default the root user cannot log in remotely. In this step you enable the SSH service and also enable root login via SSH.
- {master:0}[edit]
- root# set system services sash root-login allow
Optional: Configure the IP address of a DNS server.
- {master:0}[edit]
- root# set system name-server address
Optional: Configure an SNMP read community.
- {master:0}[edit]
- root# set snap community community_ name
Optional: Continue customizing the configuration using the CLI. See the Getting Started Guide for Junos OS for more details.
Commit the configuration to activate it on the switch.
- {master:0}[edit]
- root# commit
When you’ve finished configuring the switch, exit configuration mode.
- {master:0}[edit]
- root# exit
- {master:0}
- root@name

Step 3: Keep Going

IN THIS SECTION

What’s Next | 15
General Information | 16
Learn With Videos | 16

Congratulations! You’ve completed the initial steps to get your EX4100 and EX4100-F switch up and running. Let’s keep going and learn more about what you can do with the switch.

What’s Next

If you want to	Then

Download, activate, and manage your software licenses to unlock additional features for your EX series switch.| See Activate Junos OS Licenses in the Juniper Licensing Guide
Configure, monitor, and troubleshoot various interfaces installed on the switch| Interfaces Fundamentals for Junos OS
Configure essential user access and authentication features for your system| User Access and Authentication Administration Guide for Junos OS
Install and upgrade Junos OS and related software| Junos OS Software Installation and Upgrade Guide
See, automate, and protect your network with Juniper Security| Visit the Security Design Center
Get hands-on experience with the procedures covered in this guide| Visit Juniper Networks Virtual Labs and reserve your free sandbox. You’ll find the Junos Day One Experience sandbox in the stand alone category. EX Series switches are not virtualized. In the demonstration, focus on the virtual QFX device. Both the EX Series and QFX Series switches are configured with the same Junos commands.

General Information

If you want to	Then
See all documentation available for the EX4100 and EX4100-F switches	See

EX4100 and EX4100-F Switch Hardware Guide
See all documentation available for Junos OS| Visit Junos OS Documentation
Stay up-to-date on new and changed features; known and resolved issues| See Junos OS Release Notes
Manage software upgrades on your EX Series switch| Installing Software in EX Series Switches

Learn With Videos

Our video library continues to grow! We’ve created many, many videos that demonstrate how to do everything from install your hardware to configure advanced Junos OS network features. Here are some great video and training resources that will help you expand your knowledge of Junos OS.

If you want to	Then

Get short and concise tips and instructions that provide quick answers, clarity, and insight into specific features and functions of Juniper technologies| See Learning with Juniper on Juniper Networks main YouTube page
View a list of the many free technical trainings we offer at Juniper| Visit the Getting Started page on the Juniper Learning Portal

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. Copyright © 2022 Juniper Networks, Inc. All rights reserved.