Day One: EX Series Up and Running

Juniper Networks® EX Series Ethernet Switches deliver high-performance, scalable solutions for campus, branch office, and data center environments. You can deploy cost-effective Junos switching solutions that deliver carrier-class reliability, security risk management, network virtualization, application control, and reduced total cost of ownership. Day One: EX Series Up and Running contains all the new Enhanced Layer 2 Software (ELS) support developed to provide more programming capabilities and feature support for EX Series devices. The book delivers with hundreds of configuration examples, tips, and links into the Juniper TechLibrary.

When you’re done with this book, you’ll be able to:

  • Know the difference between ELS and non-ELS provisioning

  • Identify the different switching hardware models

  • Upgrade your system to ELS software and ELS configuration

  • Identify the new ELS commands

  • Understand the new syntax for trunk and port modes in ELS

  • Configure and monitor VLANS and TRUNKS

  • Configure inter-VLAN routing


  • Configure and Monitor port security features

  • Secure the EX connection with MACSec

Publication Praise

“Feature-packed with information and references for network engineers of all levels, from the brand new and uninitiated to the seasoned veteran looking for straight-up insights. Everything inside is a testament to the dedication that Juniper has to their customers.”

— William C. Etheridge IV, TSgt, USAF, Instructor, Cyber Transport Systems

“This is the perfect book to acquire a better understanding of Juniper EX Series Switches with everything you need to know in order to configure your device from beginning to end in a clear and concise manner.”

— Stan Carver, Senior Sales Engineer, Raytheon

“The information in this book goes well beyond “Day One” – it’s a comprehensive, much-needed reference that includes the updated Junos ELS syntax. Keep this one in your backpack.”

— Kerri Gillespie, Resident Engineer, Juniper Networks

Sample Pages

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About the Authors

Scott Reisinger is a Senior Systems Engineer for the USAF at Juniper Networks and GOTO SE for Automation. He has over fifteen years of experience working with devices running the Junos OS and has spent the last seven years with Juniper Networks. Scott is also a 15-year veteran of the USAF and has supported DoD Networks for over thirty years. Scott is the author of Day One: Deploying Zero Touch Provisioning (ZTP) by Juniper Networks Books.

JT Wilson is a Consulting Systems Engineer at Juniper Networks and GOTO SE for Switching. He has over sixteen years of networking experience and has been working for Juniper for the last ten years. JT has spent his career at Juniper supporting mission-critical DoD customer networks.

Salman Syed is a Senior Technical Marketing Engineer at Juniper Networks. He’s spent seven years with Juniper and has over thirteen years of experience in designing data center and campus networks. He holds a CCIE in routing and switching.

Author Q & A

What’s the Purpose of this Day One Book?

The purpose of this Day One book is to introduce the reader to EX Series switching and identify the updated syntax to Enhanced Layer-2 Switching (ELS) which is a change from older model switches and Junos versions. It’s also our goal to introduce the reader to everything that is required to stand up a switched network, from that first VLAN, to building Virtual Chassis, to a Juniper’s Fusion Enterprise deployment. We have tons of TIPS, NOTES and BEST PRACTICES throughout the book and there are tons of additional learning opportunities, from redirects to other books, as well as Juniper Technical Documentation.

What got you started on this book?

The old Day One was outdated and becoming inapplicable for the new Enhanced Layer-2 Software (ELS) in the field, where we are deploying thousands of newer EX Series models. People learn better when the data they need is 1) consolidated 2) relevant 3) available. Providing a hands-on demonstration of a working lab and running through specific scenarios helps readers follow along and provides them with a reference while working through those same issues in the field. It’s important to help customers, whether they are just beginning or are experienced networking engineers, make the transition from other vendors to Junos. We know that a personal touch, as well as the support we give to our customers, goes a long way to winning over their hearts and minds when it comes to Juniper.

Who is this book for?

This book is for anyone in a networking position or even those who just want to learn something new. There is a ton of information in this book that applies to all Junos devices not just EX Switches. We even show the reader how to build their own virtual lab and present them with some automation primer to get them thinking about how they can use automation in the field. We also introduce the reader to some higher-level configurations such as VRF, 802.1x, MC-LAG and Junos Fusion Enterprise (JFE), an in-depth discussion on spanning-tree, and most importantly, Juniper’s Virtual Chassis technology. There is something for everyone in this book.

After reading this book, what's the take away?

The goal is for someone who has zero experience to be able to read this book and be able to, not only provision a switch, but to be able to create an entire network, provide security through AAA, 802.1x, and understand routing and switching to move packets.

What are you hoping that people will learn from this book?

We hope that the people reading this book will learn that Junos is feature rich and easy to learn. That anyone can build a network by understanding the basic and common building blocks outlined in this book and the hope that the reader’s comprehension of Junos and Juniper Networks will grow considerably.

What’s your favorite bit/part in the book?

Virtual Chassis, Spanning-Tree, and Automation are my favorite parts but I also can’t rule out the JFE chapter. Juniper’s Virtual Chassis (VC) technology is really a game changer and the fact that all of our newer switches are Fusion ready - well that just makes it that much better.