Day One: Junos QoS for IOS Engineers

When it’s time to swap out your Cisco routers with new Juniper Networks devices, use this book to optimize the QoS functionality of your new network.

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About the Author(s)

Venkatesh Krishnan is a Network Consultant with the Professional Services Organization at Juniper Networks specializing in design and implementation of enterprise and service provider networks. Prior to joining Juniper Networks, he has also worked in the Advanced Services team at Cisco Systems working as a Network Consulting Engineer in the Service Provider team. He has assisted in designing QoS solutions for customers both on Cisco and Juniper devices. He has been in the field of Networking and Security for over 10 years. He holds a CCIE-R&S #24243.

Author Q & A

What got you started on this book?

I had already done a lot of designing and troubleshooting on QoS on the Cisco platform. When I started working on Juniper devices, I realized that I would inherently relate to Cisco and any analogy that I could establish with Cisco would help me understand things better. When I started researching for information on my first few projects, I realized that the information for QoS was scattered and a lot of blogs mentioned how difficult it was to configure QoS on Juniper. I then decided to assimilate all the information along with what I learnt from my experience and put it all together while drawing an analogy with Cisco. It helped me relate to things a lot quicker.

Who is this book for?

This book is for people who have been working with Cisco for a while and are new to Junos and Juniper devices. I can relate and completely understand the thought process of the engineer who has been asked to configure something on Junos even though it is new to them. This book addresses QoS and how you can configure the same elements on Junos that you could on Cisco.

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

This book should hopefully add a few more weapons in the engineer’s armory. For a network engineer it is equally important to build a robust configuration while at the same time being able to effectively troubleshoot it. Perhaps troubleshooting constitutes a higher percentage of the work. So knowing what to look for and where to look for will help get to the bottom of the problem sooner.

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

It really took me a while to get accustomed to the Junos CLI. But the more I started working on the CLI, the more I started liking it. The structure and the ease with which I could find the necessary specifics in a configuration file made life easier for me. Through this book, I have tried to communicate that.

What do you recommend as the next item to read after this book?

If this book has got you interested in QoS then here is one book I would recommend as the next read “Juniper MX Series” - This is a handy book and gives a detailed overview of the MX devices including QoS.

There are also a lot of Day One books available that will help answer queries regarding how specific things are configured in Junos and how they relate to Cisco IOS.

What’s your inspiration?

To be honest, in the beginning I always wanted to run away from QoS because it seemed so esoteric and boring. But left with no choice I had to troubleshoot QoS problems. This made me read and understand all about QoS. Slowly I started appreciating the need for QoS. Most of us dislike dealing with QoS, but if there was a way to breaking it into small steps and achieve a complete configuration based upon those steps then it makes everyone’s task so much easier. I started compiling all this information so that it could help me with my work. I m sure there are many others like me and this book is for them.

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

The “aha!” moment when I realized and could bridge the gap in my understanding of Cisco and Junos QoS. The section where we highlight how Cisco relates to the 5 basic steps in QoS, then how Junos relates to the same 5 steps and finally comparing them side by side.