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JUNOS FOR IOS ENGINEERS: HOW DO YOU CONFIGURE A JUNOS ROUTER?

May 4, 2020July 6, 2020 Chris 2240 Views 2 Comments

In Part 2 of this series we look at how you make configuration changes in Junos – and how you can very easily scrap your changes without doing any damage o your network. Very clean!

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junos junos for ios engineers ospf 

JUNOS FOR IOS ENGINEERS: HOW DO I READ A JUNOS CONFIG?

March 22, 2020December 12, 2020 Chris 3547 Views 0 Comments

In this first part of my new series, I explain why a Junos config looks the way it does. What’s wth the curly brackets and the spacing? Click to find out!

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ipv6 ospf ospfv3 routing 

OSPFv3 – HOW TO READ IPv6’s OSPF DATABASE

January 5, 2018October 20, 2018 Chris 6384 Views 3 Comments

Once you’ve read my guide to the new link-state advertisement types in OSPFv3, give this post a read, where we take a deep-deep into the OSPFv3 database. Put your topology hat on: we’re going exploring.

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ipv6 ospf ospfv3 routing 

OSPFv3: THE NEW LSA TYPES IN IPv6 OSPF

January 5, 2018October 20, 2018 Chris 7204 Views 0 Comments

When I first heard that OSPFv3 introduced even more link-state advertisement (LSA) types, I despaired. As if the original seven didn’t take us long enough to memorise! Then I actually learned what they do – and honestly, it’s hard to imagine why we ever did it any differently. Let’s learn about them together!

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ospf routing 

OSPF: STUB AREAS VS STUB NETWORKS: WHAT IS THE DIFFERENCE?

December 6, 2017October 20, 2018 Chris 3973 Views 0 Comments

Big-ups to the designers of OSPF for giving very similar names to two totally different things. In this post, we clarify the difference between stub areas and stub networks.

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ospf routing 

OSPF: WHAT IS A STUB NETWORK?

December 6, 2017August 2, 2020 Chris 19188 Views 0 Comments

When you’re first getting to grips with your router’s OSPF database, you might see mention of something called a “stub network”. And let me tell you: never before have I seen a phrase so clumsily defined. Let’s take a look, and find out what a stub network actually is.

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junos ospf routing 

OSPF: WHAT IS A STUB AREA?

December 6, 2017August 30, 2020 Chris 11670 Views 6 Comments

Stub areas are a very easy concept to understand, but it comes with a ton of specific jargon that can make it super-daunting. So, in this post I’ll take time to explain these concepts, and to define just enough jargon to make you feel like you’re part of the elite. We’ll take it slow, like new lovers, or someone cooking an expensive turkey.

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Hi!

I’m Chris, a network engineer, Juniper Ambassador and JNCIE-SP #2981. I’ve contributed towards a few books for Juniper in my time, and I have a few vendor certifications too, from Juniper, Cisco, Palo Alto and F5. But don’t mistake it for me actually knowing anything: I just do exams because I like a good pub quiz.

This is a blog of random knowledge I’ve acquired while studying for those sweet sweet network engineering certifications. There’s a big focus on Juniper in this blog, but sometimes I do other vendors too.

As I learn cool new stuff, I try to write it up with plenty of jokes, and a generous dollop of silliness, so that you’ll have as much fun learning about networking as I do.

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