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Day One: Routing the Internet Protocol

This networking fundamentals book describes how a Junos device is able to forward a packet between networks using either static routes or any of five popular routing protocols: RIP, OSPF, IS-IS, iBGP, and eBGP. Learn how to route the Internet Protocol in a day.

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About the Author(s)

Martin Brown is a Network Security Engineer for a major telco based in the UK, and a Juniper Ambassador with knowledge that covers a broad range of network devices. Martin started his career in IT 20 years ago supporting Macintosh computers, became an MCSE in 1999, and has since progressed to networking, supporting most of the major manufacturers including Cisco, F5, Checkpoint, and of course, Juniper.

Nick Ryce is a Senior Network Architect for a major ISP based in Scotland, and a Juniper Ambassador. Nick has over a decade of experience working within the Service Provider industry and has worked with a variety of vendors including Cisco, Nortel, HP and Juniper. Nick is currently certified as JNCIE-ENT #232.

Author Q & A

What got you started on this book?

(MB) I decided to start on this book, as I knew how difficult it was to find information that made sense. There is plenty of great information out there about these topics but most of it tends to be very high level. What I mean is, an engineer doesn’t really care about the structure of a packet when all they want to do initially is ping a server on another subnet.

(NR) I’ve always wanted to author/co-author a Day One book due to the way that they are targeted and written for specific topics. The first Day One book I ever read was Exploring IPv6 by Chris Grundeman as I needed to get a quick grasp on the fundamentals. It was so well written and was really specific for what I wanted to learn that the book was invaluable to me.

Who is this book for?

(MB) Whilst writing this book I tried to bear in mind those engineers who are on their career path but need to learn information quickly and easily.

(NR) I think this book is for engineers starting out in the industry who would like to have a little more in knowledge of the protocols.

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

(MB) For me, I would hope that any engineer reading it would be able to understand the protocols in a little more detail but additionally I would hope the engineer would keep referring to this book from time to time.

(NR) I think this Day One book will bolster an engineer’s knowledge of the protocols and provide a further appreciation and understanding of them and where/when to apply them.

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

(MB) I would hope that engineers would be able to appreciate each protocol for what it is. Sure, RIP is old, it’s not scalable, but it is also underrated and is perfect for small LAN’s.

(NR) I hope that people will realise that each routing protocol has its place and with the information in this book they can weigh up the pros and cons of each to allow them to make the right decision.

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

(MB) After reading this, then I would like to think an engineer would like to progress further by reading “Junos Enterprise Routing” published by O’Reilly as this will expand on the knowledge in this book.

(NR) It’s very hard to try and recommend another item to read without knowing what the engineer is trying to achieve. With the Day One library in their bookmarks tab I don’t think they will have an issue finding another topic that will peak their interest!

What's your inspiration?

(MB) When I tell people I’ve published a book, the first thing they say is usually “Wow, really” in a way that means they are surprised. I think this inspires me, to be able to get a reaction like that from someone is a good feeling and this is why I keep on writing.

(NR) I think seeing other Juniper Ambassadors publish and speaking to them about the sense of achievement it brings them gives me inspiration. Also seeing the value that the community gets out of the Day One books is another great driver in co-authoring books like these.

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

(MB) BGP. This isn’t a strong area of mine as I don’t get to work on it too often and having Nick work on this allowed me to read and understand it a little bit more.

(NR) Summarisation. It can be a key tool for engineers when trying to reduce the number of routes in a routing table and can come in very handy when connecting large sites together.