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bgp juniper junos mpls routing vpn 

Route Distinguishers: The Secret To Load Balancing In Multihomed MPLS VPNs

June 7, 2022March 24, 2024 Chris 47709 Views 0 Comments

There’s three types of route distinguisher – and one of them unlocks some seriously useful advantages. If you don’t know how to use route distinguishers for load balancing inside an MPLS VPN, then this post is for you. Junos config, but vendor-neutral theory. Give it a read!

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mpls vpn 

You’re Probably Using The Term MPLS Wrong

April 5, 2022March 24, 2024 Chris 53714 Views 3 Comments

Is this title clickbait? I don’t think so – because once upon a time, I did exactly the same thing, and it cost me a job! Well, don’t worry: I’m here to help you avoid making the same mistake. Click here to find out my wild story, and how you can bring some commendable precision to your conversations about networking.

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bgp juniper junos mpls routing vpn 

L2VPN: THE LABEL BASE AND OFFSET, EXPLAINED!

February 13, 2021March 24, 2024 Chris 22495 Views 6 Comments

Pseudowires are easy on the surface – but dig a bit deeper, and there’s some interesting complexity. Click here to learn the details about BGP-signalled L2VPNs!

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bgp juniper junos mpls vpn 

JUNIPER JNCIP-SP: USING INDEPENDENT-DOMAIN TO TUNNEL CUSTOMER BGP VPN PREFIXES

August 22, 2020March 24, 2024 Chris 11591 Views 1 Comment

The independent-domain command is a little-known but big-useful command. Let’s see how we can use it in Junos to tunnel localpref info from one VPN customer site to another!

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bgp jncis juniper junos junos for ios engineers mpls routing vpn 

ROUTE DISTINGUISHERS vs ROUTE TARGETS: WHAT’S THE DIFFERENCE? (JUNOS FOR CISCO IOS ENGINEERS)

May 10, 2020March 24, 2024 Chris 77908 Views 19 Comments

In this post we use both Cisco IOS and Juniper Junos config to see the difference between route-distinguishers and route-targets in MPLS VPNs. Why do we need both of them? Click here to find out!

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juniper junos mpls routing vpn 

HUB-AND-SPOKE MPLS L3VPNs – ADVANCED CUSTOMISATION, ON JUNIPER JUNOS ROUTERS

September 7, 2019March 24, 2024 Chris 12130 Views 0 Comments

Hey there: this is part 3 in my series on hub-and-spoke MPLS VPNs! In this post we see the dangers of commands like as-override and independent-domain – and then, we see how to fix the problems they cause. Strap in!

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bgp juniper junos mpls vpn 

HUB-AND-SPOKE MPLS L3VPNs WITH ONE INTERFACE, ON JUNIPER JUNOS ROUTERS

August 30, 2019March 24, 2024 Chris 11710 Views 0 Comments

There’s a few different ways of configuring a hub-and-spoke MPLS VPN. In this blog post we learn all about the “one interface” approach. Whether you’re an architect or a student of the JNCIE, you’ll want to know this one inside out!

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bgp juniper junos mpls vpn 

HUB-AND-SPOKE MPLS L3VPNs WITH TWO INTERFACES, ON JUNIPER JUNOS ROUTERS

August 24, 2019March 24, 2024 Chris 13342 Views 0 Comments

Hub-and-Spoke VPNs work a little differently than your regular full-mesh MPLS VPN. Want to learn the extra config required for this unique topology? Then click this post for some good learning!

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juniper junos mpls routing vpn 

INTERPROVIDER OPTION C, ON JUNIPER JUNOS ROUTERS – PART 3: USING RSVP, AND PUTTING BGP-LU INTO INET.0

July 10, 2019March 24, 2024 Chris 13668 Views 2 Comments

In this third and final post on Interprovider Option C, we replace LDP with RSVP. Plus, we see the impact of putting BGP-LU in Juniper’s inet.0 table. Put your science hat on, and click here!

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bgp juniper junos mpls routing vpn 

INTERPROVIDER OPTION C, ON JUNIPER JUNOS ROUTERS – PART 2: THE THREE LABEL STACK, AND THE USE CASE VS OPTION B

July 10, 2019March 24, 2024 Chris 10638 Views 0 Comments

In Part 2 of this series we take a look at the label stack in Interprovider Option C. Plus, we look at the use case, and compare it to Option B. Plus: win a trillion pounds! (Not true)

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Hi there!

Welcome to my blog of networking and nonsense.

I’m Chris. By day I’m a London-based network engineer, instructor, and courseware developer for Juniper Networks. But in my spare time I come here to write some sweet sweet blog posts to help you with your networking studies, with just as much focus on fun as on the tech. I hope you like what you see!

In this corner of the information super-highway you’ll find tons of stuff about BGP, MPLS, OSPF and IS-IS. If that sounds fun then you’ve come to the right place. You’ll also find posts I made on my journey towards JNCIE-SP, which I hope will help you on your own journey.

There’s a big focus on Juniper and Junos in this blog, but tons of the theory is entirely vendor-neutral. No matter what networking platform you’re more comfortable with, you’re very welcome here.

Please note that it costs £750,000 to read my posts. This is enshrined in international law, and late payment will result in the fee being scrapped and replaced with a £25 fine. I did ask the United Nations to scrap this law entirely, but they insisted that it stayed. Sorry readers, it’s out of my control.

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