Juniper Day One+ Installation instructions
Day One+
QFX5120-32C
IN THIS GUIDE
Step 1: Begin | 1
Step 2: Up and Running | 7
Step 3: Keep Going | 10
Step 1: Begin
IN THIS SECTION
Meet the QFX5120-32C Ethernet Switch | 2
Install the QFX5120-32C | 2
Power On | 5
In this guide, we provide a simple, three-step path, to quickly get you up and running with your new QFX5120-32C 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 QFX5120-32 switch in a rack, power it up, and deploy it on your network. There’s a separate Day
One+ guide for the QFX5120-48 switch (see QFX5120 on the Day One+ webpage). For details on installing a DC powered
QFX5120-32C, see QFX5120 Switch Hardware Guide.
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 Junos Day One Experience
sandbox in the stand alone category.
Meet the QFX5120-32C Ethernet Switch
The Juniper Networks®QFX5120-32C is a compact, 1-U fixed configuration switch with 32 100GbE or 40GbE QSFP28
ports, making it ideal for data centers that require top-of-rack and spine-and-leaf deployments. You can also use the
QFX5120-32C for high-density server connectivity, with options to channelize the QSFP28 ports. Along with 32 QSFP28
ports, the QFX5120-32C has two SFP+ ports, an RJ-45 management port, an RJ-45 console port, and a USB port. Dual
hot-swappable AC or DC power supplies provide 1+1 redundancy. Six hot-swappable fan trays with N+1 redundancy
maintain high system availability.
The QFX5120 supports many network automation features and plug-and-play features, including zero-touch provisioning
(ZTP), making it simple to deploy on your network.
In this guide, we show you how to install, power on, and configure the basic settings for an AC-powered QFX5120-32C
switch to get you up and running on the network quickly. There’s a separate Day One+ guide for the QFX5120-48T,
QFX5120-48Y, and QFX5120-48YM switches (see QFX5120 on the Day One+ webpage).
Install the QFX5120-32C
IN THIS SECTION
What's in the Box? | 2
What Else Do I Need? | 3
Install the QFX5120-32C in a Four-Post Rack | 3
What's in the Box?
•QFX5120-32C switch with six preinstalled fan modules and two preinstalled AC power supplies
•Two AC power cords appropriate for your geographical location
•An Ethernet cable
2
•An RJ-45 to DB-9 serial port adapter
•A four-post rack mounting kit that contains:
•Two front mounting brackets
•Two side mounting rails
•Twenty flat head M4X8 screws to attach the front mounting brackets and side mounting rails to the switch chassis
•Two rear mounting (L-shaped) brackets
•Two pan head M4X8 screws to attach the rear mounting brackets to the side mounting rails
What Else Do I Need?
You’ll need to provide:
•Someone to help you secure the switch to the rack
•Eight mounting screws to secure the switch to the rack
•A number 2 Phillips (+) screwdriver
•An electrostatic discharge (ESD) grounding strap
•A management host such as a laptop or desktop PC
•A serial-to-USB adapter (if your laptop or desktop PC doesn’t have a serial port)
•A grounding cable: 12 AWG (2.5 mm²), minimum 90° C wire, or as permitted by the local code, with a 4.3-mm circular
lug attached
CAUTION: Ensure that a licensed electrician has attached the appropriate grounding lug to the
grounding cable that you supply. Using a grounding cable with an incorrectly attached lug can damage
the switch.
•An 8-mm screw to secure the grounding lug
Install the QFX5120-32C in a Four-Post Rack
1. Review the General Safety Guidelines and Warnings.
2. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end to a site ESD
point.
3. Position the switch in the rack so that the F2B labels on the fan modules are facing the cold aisle, or the B2F labels on
the fan modules are facing the hot aisle.
3
4. Attach the front mounting brackets to the switch.
g051132
5. Attach the side mounting rails to the switch.
g0xxxxx
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6. Lift the switch and position it in the rack. Line up the bottom hole in each mounting bracket with a hole in each rack
post, making sure the switch is level.
7. While you’re holding the switch in place, have a second person insert and tighten the rack mounting screws to secure
the mounting rails to the rack posts. Make sure to tighten the screws in the two bottom holes first, and then tighten
the screws in the two top holes.
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8. Continue holding the switch in place, and have the second person slide the rear mounting brackets into the side
mounting rails.
4
9. Secure the rear mounting brackets to the rack posts using the rack mount screws. Secure the rear mounting brackets
to the side mounting rails by using the pan head M4X8 screws.
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10. Verify that the mounting brackets on each side of the rack are level.
Power On
Now that you’ve mounted your switch in the rack, you’re ready to connect it to power.
The AC-powered QFX5120-32C comes with two AC power supplies preinstalled on the rear panel.
1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end to one of the
ESD grounding points 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 attached to the grounding cable over the protective earthing terminal on the rear panel.
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4. Secure the grounding lug to the protective earthing terminal using the 8-mm screw.
5. Dress the grounding cable, and ensure that it doesn’t block access to or touch other device components, and that it
doesn’t drape where people could trip over it.
5
6. Ensure that the power supplies are fully inserted in the switch.
7. Connect the power cord to the AC power socket on the power supply:
a. Push the end of the retainer strip into the hole next to the AC power socket until it snaps into place.
b. Ensure that the loop in the retainer strip faces the power cord.
c. Press the small tab on the retainer strip to loosen the loop. Slide the loop until you have enough space to plug the
power cord into the switch.
d. Plug the power cord into the switch.
e. Slide the loop toward the switch until it is snug against the base of the power cord coupler.
f. Press the tab on the loop, and draw out the loop into a tight circle.
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8. If the AC power source outlet has a power switch, turn it off.
9. Plug in the power cord to the AC power source outlet. The switch powers on as soon as you plug it in. There is no
power switch on the QFX5120-32C.
10. If the AC power source outlet has a power switch, turn it on.
11. Verify that the LED on the power supply is lit steadily green. If the LED is lit steadily red or is blinking red, disconnect
the power supply from the power source, and replace the power supply (see Maintain the QFX5120 Power System in
the QFX5120 Switch Hardware Guide).
12. Repeat steps 7-11 to power on the second power supply.
6
Step 2: Up and Running
IN THIS SECTION
Plug and Play | 7
Customize the Basic Configuration | 7
Now that the QFX5120-32C is powered on, let’s do some initial configuration to get it up and running on the network.
It’s simple to configure and manage the QFX5120-32C using the CLI.
Plug and Play
The QFX5120-32C switch ships with factory-default settings that enable plug-and-play operation. These settings load as
soon as you power on the switch.
Customize the Basic Configuration
You can easily customize the factory-default configuration with just a few commands. When you commit changes to the
configuration, a new configuration file is created. This becomes the active configuration. You can always revert to the
factory-default configuration anytime you want.
Have the following information ready before you begin customizing the switch:
•Root authentication password
•Management port IP address
•Default gateway IP address
•DNS server IP address
7
1. Verify that the your laptop or desktop PC has the following default serial port settings:
•Baud Rate—9600
•Data—8
•Flow Control—None
•Parity—None
•Stop Bits—1
•DCD State—Disregard
2. Connect the console port (labeled CON) on the QFX5120-32C rear panel to a serial port on your laptop or desktop
PC using the Ethernet cable and RJ-45 to DB-9 adapter. 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 login 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.
login: root
4. Start the CLI.
root@:RE:0% cli
root>
5. Enter the configuration mode.
root> configure
[edit]
root#
6. Add a password to the root administration user account. Enter a plain-text password, an encrypted password, or an
SSH public key string.
Plain-text password:
[edit]
root# set system root-authentication plain-text-password
New password: password
Retype new password: password
8
Encrypted password:
[edit]
root# set system root-authentication encrypted-password encrypted-password
SSH-ECDSA password:
[edit]
root# set system root-authentication ssh-ecdsa public-key
SSH-ED25519 password:
[edit]
root# set system root-authentication ssh-ed25519 public-key
SSH-RSA password:
[edit]
root# set system root-authentication ssh-rsa public-key
7. Configure the default gateway.
[edit]
root# set routing-options static route 0/0 next-hop address
8. Configure the IP address and prefix length for the management interface on the switch.
[edit]
root# set interfaces em0 unit 0 family inet address address/prefix-length
NOTE: The management port em0 (labeled MGMT) is on the front panel of the QFX5120-32C.
The management interface provides a dedicated out-of-band management channel to manage devices on the network.
If you need to configure in-band management, see Configure Junos OS on the QFX5120 in the QFX5120 Switch Hardware
Guide.
9. Configure the IP address of a DNS server.
[edit]
root# set system name-server address
9
10. Configure the SSH service.
[edit]
root# set system services ssh root-login allow
11. Commit the configuration to activate it on the switch.
[edit]
root# commit
12. When you’ve finished configuring the switch, exit the configuration mode.
[edit]
root# exit
root>
Step 3: Keep Going
IN THIS SECTION
What’s Next? | 10
Learn With Videos | 11
Congratulations! Your 5120-32C is configured and ready to go. Here are some things you can do next.
What’s Next?
ThenIf you want to
See Activate Junos OS Licenses in the Juniper Licensing
Guide
Download, activate, and manage your software licenses to
unlock additional features for your QFX series switch
See the QFX5120 Documentation in the Juniper
Networks TechLibrary
See all documentation available for the QFX5120
10
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