Route Target Import and Export | Extending VRF's Across the Core | VRFs Part 3

Route Target Import and Export | Extending VRF's Across the Core | VRFs Part 3

It's great that we can segregate our customers into virtual routing tables using VRF's. But how do we enable this across many routers?

It would be difficult to manually configure VRFs on each router. Imagine the time and effort spent on this task!

Instead, we can use MP-BGP (Multiprotocol BGP) to tag each route as they're shared. These tags are called route-targets. Now routes can be exported out of a VRF on one router, shared with another router through BGP, and then imported into the correct VRF.

While we're on the topic, how do routes stay unique in the BGP database? VRF's can also be given a tag, called a route-distinguisher, which accomplishes this task.

In this video, we'll see how to configure route distinguishers and route targets to keep customer routes unique. We'll also see how to share routes across a core network. Maybe we'll even see a little introduction to MPLS!

This includes a lab you can follow along with.

You can download the labs, and practice on your own if you want (Patreon).

Part 1: VRF Lite - The Fundamentals of how VRF's work. This covers route separation, why you need it, and how it's configured

Part 2: Dynamic Routing - Taking it a step further, we see how to add OSPF, EIGRP, and BGP routing, all while keeping it VRF-aware

Part 3: Route Targets - VRF's are local to each router. But, we can use route-targets and MP-BGP to share routes between VRF's on different routers. The ed result? VRF's are spanned across your network!

Part 4: Route Leaking - VRF's keep routes separate, but what if you have some important services to share? How do you share the routes then? With Route Leaking!

[ahmed]

by far the best trainer on the entire YouTube, your videos are unique.

[Sportygirl]

thank you! very informative about differences between RD and RT and the necessety of LDP between routers to form an end-to-end L3VPN

[oliver]

Really awesome video! I can tell you put a lot of effort into making this. I have always been interested in how VRFs work and how to implement them in the real world and you have explained it perfectly in this series. It would be really cool if you made a series on MPLS too :)

[juleoida]

This Video Series is most likely the best VRF Tutorial on whole YouTube.. Thanks a lot for this!!

[someone-yjwx]

Thank you alot

Finally I undestand the different between RD and RT

[tusharnaik]

Nice one....really your efforts are appreciated.

[Nathlord]

This video is pretty much exactly what everyone needs, thank you! Really clear. Have subscribed :)

[PupTunesMusicForDogs]

This video really helped me, thanks!👍

[krishnagowrapura]

It's Awesome videos and nice explanation, Easy to understand, Today i understood the difference b/w RD & RT.. Please continue the same

[vasjabatareikin]

Great video, help me understand import and export.

[dewminator]

Very nice .. thanks for creating this video...

[rakeshbelsare]

Really nice and short as I was looking for please create on other technology. Thank

[donedeal]

Great video!!! I would really appreciate a video on MPLS one day from you. : )

[luckynumbersevuuun]

my man, very strong content, sir. submitted your suggestion about alternative spellings

[redlert]

Nice job, I recommend creating a series with SP core and explain about route reflectors and confederations.

[chanducando]

Great Video, thanks for the education. Between the cores - If it is a L2 trunk, can we create L3 interfaces and attach VRFs and separate the BGP neighborship per VRF using one link?

[Blueadi]

Great video...Yes sir..i would love to know about MPLS in details from you

[prabhun]

Really awesome vedio.. just one question.. incase if we have one more core router between core1 and core 2 .. how that core router behave? Do we have to create vrf on that router also?

[mymediapc]

Great video!

It almost seems like MPLS was made with VRFs in mind, , definitely would like to know more about MPLS. You also mention MPLS being one of the most common technologies that could be used in the case of the labels. What are some of the others and are they as practical?

[mosasa]

Question... How is RT still keeping the routes unique as they pass between the two core routers if they have been given the same RT value?