Juniper EX Series User manual

Day One+
EX4100
IN THIS GUIDE
Step 1: Begin | 1
Step 2: Up and Running | 7
Step 3: Keep Going | 11
Step 1: Begin
IN THIS SECTION
Meet the EX4100 Ethernet Switches | 2
Install the EX4100 | 3
Power On | 6
In this guide, we provide a simple, three-step path, to quickly get you up and running with your new EX4100 switch.
We’ve simplied and shortened the installaon and conguraon steps, and included how-to videos. You’ll learn how to
install an AC-powered EX4100 in a rack, power it up, and congure basic sengs.
NOTE: Are you interested in geng hands-on experience with the topics and operaons covered in this guide?
Visit Juniper Networks Virtual Labs and reserve your free sandbox today! You’ll nd the Junos Day One
Experience sandbox in the stand alone category. Because EX switches are not virtualized, in the demonstraon,
focus on the virtual QFX device. Both the EX and QFX switches are congured with the same Junos commands.

Meet the EX4100 Ethernet Switches
IN THIS SECTION
EX4100-24P, EX4100-24T, EX4100-48P, and EX4100-48T Switches | 2
The Juniper Networks® EX4100 Ethernet Switches are built to be cost-eecve soluons 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 oer levels of performance and management previously available only with high-end
access switches. The EX4100 switches have Power over Ethernet (PoE+) ports for powering network devices connected
to the switches.
The EX4100 switch models have eld-replaceable units (FRUs) such as AC/DC power supplies and fan modules.
EX4100 switch models are:
• EX4100-24P, EX4100-24T, EX4100-48P, and EX4100-48T. See "EX4100-24P, EX4100-24T, EX4100-48P, and
EX4100-48T Switches" on page 2.
EX4100 switches are cloud nave switches that you can manage in a cloud network by using Juniper Mist™ cloud.
EX4100 switches support Virtual Chassis technology, making it easy for you to scale the network without increasing the
number of devices to manage. The EX4100 switches are available in 24-port and 48-port models, with AC or DC and
built-in power supplies, and with dierent airow direcons.
In this guide, we show you how to install a EX4100 switch model with an AC power supply. If you need instrucons for
installing fans and power supplies on EX4100 switch models see the EX4100 Switch Hardware Guide.
EX4100-24P, EX4100-24T, EX4100-48P, and EX4100-48T Switches
EX4100-24P
EX4100-24T
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EX4100-48P
EX4100-48T
Here are the port conguraon 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.
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.
Install the EX4100
IN THIS SECTION
What's in the Box? | 3
What Else Do I Need? | 4
Install the EX4100 Switch in a Rack | 4
What's in the Box?
• EX4100 switch with two preinstalled fan modules and one preinstalled power supply unit
• One AC power cord appropriate for your geographical locaon.
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• 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
•Mounng screws to secure the EX4100 switch to the rack
• A number two Phillips (+) screwdriver
• A serial-to-USB adapter (if your laptop doesn’t have a serial port)
• An electrostac discharge (ESD) grounding strap
• A management host such as a laptop or desktop PC
• Two M5X10mm screws with washer to secure the grounding lug
• A grounding cable: 8 AWG (2 mm²), minimum 90° C wire, or as permied by the local code, with a Panduit
LCD8-14A-L or equivalent lug aached
CAUTION: Have a licensed electrician aach the appropriate grounding lug to the grounding cable that
you supply. Using a grounding cable with an incorrectly aached lug can damage the switch.
Install the EX4100 Switch in a Rack
Before you start the installaon, 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 switch on a desktop or other level surface, in a two-post or four-post rack, or on a wall. The
mounng 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 mounng
kits. The four-post rack mount kit also has brackets for mounng the switch in a recessed posion in the rack.
1. Place the switch on a at, stable surface.
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2. Aach an ESD grounding strap to your bare wrist, and connect the strap to the ESD grounding point on the switch.
3. Li the switch and posion it in the rack. Posion 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 boom hole in each
mounng bracket with a hole in each rack post, ensuring that the switch is level.
4. While you’re holding the switch in place, have a second person insert and ghten the rack mount screws to secure
the mounng brackets to the rack posts. Tighten the screws in the two boom holes rst, and then ghten the
screws in the two top holes.
5. Check that the mounng brackets on each side of the rack are lined up with each other.
5

Power On
Now you’re ready to connect the EX4100 switch to a dedicated AC power source. The switch comes with the AC
power cord for your geographic locaon.
Here's how to connect the switch to AC power:
1. Aach an ESD grounding strap to your bare wrist, and connect the strap to the ESD grounding point on the switch.
2. Connect one end of the grounding cable to a proper earth ground, such as the rack .
3. Place the grounding lug (that's aached to the grounding cable) over the protecve earthing terminal on the rear
panel as depicted in the following gures.
EX4100-24P, EX4100-24T, EX4100-48P, and EX4100-48T switch models
4. Secure the grounding lug to the protecve earthing terminal using the two M5X10 mm screws with washer
5. 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.
6. Ensure that the power supply is fully inserted in the rear panel of the switch.
7. On the rear panel, connect the power cord retainer clip to the AC power supply:
a. Push the end of the power cord retainer strip into the slot above the power cord socket unl 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).
b. Press the small tab on the retainer strip to loosen the loop. Slide the loop unl there's enough space to insert
the power cord coupler into the power cord socket.
c. Plug in the power cord to the power cord socket.
d. Slide the loop toward the power supply unl it's snug against the base of the coupler.
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e. Press the tab on the loop and draw out the loop into a ght circle.
8. If the AC power source outlet has a power switch, turn it o.
9. Insert the power cord plug into an AC power source outlet.
10. If the AC power source outlet has a power switch, turn it on. The switch powers on as soon as you plug it in.
11. 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 Switch Hardware Guide).
Step 2: Up and Running
IN THIS SECTION
Plug and Play | 7
Customize the Basic Conguraon Using the CLI | 8
Now that the EX4100 switch is powered on, let’s do some inial conguraon 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 conguraon
tool that’s right for you:
• Juniper Mist. To use Mist, you’ll need an account on the Mist Cloud Plaorm. See Overview of Connecng Mist
Access Points and Juniper EX Series Switches.
• CLI commands
Plug and Play
EX4100 switches already have factory-default sengs congured right out of the box to make them plug-and-play
devices. The default sengs are stored in a conguraon le that:
7

• Sets Ethernet switching and storm control on all interfaces
• Sets Power over Ethernet (PoE+) on all RJ-45 ports of models that provide 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 sengs are loaded as soon as you power on the switch. If you want to see what’s in the factory-default
conguraon le for your switch, see EX4100 Default Conguraon.
Customize the Basic Conguraon Using the CLI
Have these values handy before you begin customizing sengs for the switch:
• Hostname
• Root authencaon password
• Management port IP address
• Default gateway IP address
•(Oponal) DNS server and SNMP read community
1. Verify that the serial port sengs 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
2. Connect the console port on the EX4100 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).
3. At the Junos OS log in prompt, type root to log in. You don't need to enter a password. If the soware 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.
8

NOTE: EX Series switches running current Junos soware are enabled for Zero Touch Provisioning (ZTP).
However, when you congure an EX Series switch for the very rst me, 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
4. Start the CLI.
root@:RE:0% cli
{master:0} root>
5. Enter conguraon mode.
{master:0} root> configure
{master:0}[edit]
root#
6. Delete the ZTP conguraon. Factory default conguraons can vary over dierent 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
7. Add a password to the root administraon 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
8. Acvate the current conguraon to stop ZTP messages on the console.
{master:0}[edit]
root# commit
configuration check succeeds
commit complete
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9. Congure the hostname.
{master:0}[edit]
root# set system host-name name
10. Congure the IP address and prex length for the management interface on the switch. As part of this step, you
remove the factory default DHCP seng for the management interface.
{master:0}[edit]
root# delete interfaces vme unit 0 family inet dhcp
root# set interfaces vme unit 0 family inet address address/prefix-length
11. Congure the default gateway for the management network.
{master:0}[edit]
root# set routing-options static route 0/0 next-hop address
12. Congure 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 ssh root-login allow
13. Oponal: Congure the IP address of a DNS server.
{master:0}[edit]
root# set system name-server address
14. Oponal: Congure an SNMP read community.
{master:0}[edit]
root# set snmp community community_name
15. Oponal: Connue customizing the conguraon using the CLI. See the Geng Started Guide for Junos OS for
more details.
16. Commit the conguraon to acvate it on the switch.
{master:0}[edit]
root# commit
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