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Day One+
QFX5120
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 Line of Ethernet Switches | 2
Install the QFX5120 | 3
Power On | 5
In this guide, we provide a simple, three-step path, to quickly get you up and running with your new QFX5120-48 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 QFX5120-48 switch in a rack, power it up, and deploy it on your network. There's a separate Day
One+ guide for the QFX5120-32C switch (see
powered QFX5120-48, see
NOTE:
Are you interested in getting hands-on experience with the topics and operations covered in this guide?
Visit
Juniper Networks Virtual Labs
sandbox in the stand alone category.
QFX5120-32C
QFX5120 Switch Hardware
and reserve your free sandbox today! You'll find the Junos Day One Experience
on the Day One+ webpage). For details on installing a DC
Guide.

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Summary of Contents for Juniper Day One+ QFX5120

  • Page 1 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.
  • Page 2 Meet the QFX5120 Line of Ethernet Switches ® The Juniper Networks QFX5120-48T, QFX5120-48Y, and QFX5120-48YM switches are compact, 1-U fixed configuration switches ideal for top-of-rack and spine-and-leaf deployments. You can also use the QFX5120 line of switches for high-density server connectivity, with an option to channelize the QSFP28 ports into multiple interfaces. In addition, you can deploy the QFX5120 line of switches as campus distribution and core switches.
  • Page 3 Install the QFX5120 IN THIS SECTION What's in the Box? | 3 What Else Do I Need? | 3 Install the QFX5120 in a Four-Post Rack | 4 What's in the Box? QFX5120 switch with five preinstalled fan modules and two preinstalled AC power supplies Two AC power cords appropriate for your geographical location An Ethernet cable An RJ-45 to DB-9 serial port adapter...
  • Page 4 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. Two 10-32 x .25-in. screws with #10 split-lock washers to secure the grounding lug Install the QFX5120 in a Four-Post Rack You can mount the QFX5120-48T, QFX5120-48Y, and QFX5120-48YM switches in a four-post 19-in.
  • Page 5 7. Continue holding the switch in place, and have the second person slide the rear mounting brackets into the side mounting rails. 8. Secure the rear mounting brackets to the rack posts using the rack mount screws. 9. 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.
  • Page 6 4. Secure the grounding lug to the protective earthing terminal using the 10-32 x .25-in. screws with #10 split-lock washers. 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.
  • Page 7: Step 2: Up And Running

    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. 10. If the AC power source outlet has a power switch, turn it on. 11.
  • Page 8 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 1. Verify that your laptop or desktop PC has the following default serial port settings: Baud Rate—9600 Data—8 Flow Control—None...
  • Page 9 Plain-text password: [edit] root# set system root-authentication plain-text-password New password: password Retype new password: password 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...
  • Page 10 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 10.
  • Page 11: What's Next

    Security Services Administration Guide Configure time-based protocols for your network devices See the Time Management Administration Guide running Junos OS See, automate, and protect your network with Juniper Visit the Security Design Center Security Get hands-on experience with the procedures covered in...
  • Page 12 Juniper 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.