MPLS L3VPN Label Swapping Fun with Fish

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I suggest going to the above blog and downloading the PDF and the PCAP file and then clicking on the KZbin link. Below is a timeline of the breakdown of the ~25 minute KZbin
Intro and Overview - (Start til 4:33)
MPLS L3VPN (4:34 - 8:04) - MultiProtocol label switching. Big picture. Pic of typical protocols use for advertising labels in a MPLS L3VPN environment - BGP for the inner (vpn) label and LDP for the outer label.
Placement of the Sniffer (8:05 - 9:30)
BGP Labels (9:31 -11:25) - line 81 in the sniffer trace will show 10.100.100.17 (Charlie17) sends an update to Charlie6 that Charlie17 (10.100.100.17) can get to 10.100.100.2 and to use a label (tag) of 20.
Are We Ready? (11:26 - 13:30) Question: If a Ping comes into Charlie6 from R1 to get to 10.100.100.2 - can Charlie6 just push label 20 on it and send it to Charlie7?
LDP Labels (13:31 - 15:28) - looking at the sniffer trace we can see Charlie7 (10.100.100.7) advertising to Charlie6, via their LDP neighbor relationship, that Charlie7 (10.100.100.7) can help Charlie6 get to 10.100.100.17. And to use a label of 23.
Putting It All Together - Time to Follow the Labels. 🙂
Charlie6 Perspective (15:29-17:53)
Charlie7 (17:54 - 19:16)
A Caveat about Charlie16 (19:17 - 20:25)
Charlie16 (20:26 - 21:44)
Charlie17 (21:45 - 22:57)
Wireshark Fun (22:58 to 24:56)- Checking out the sniffer trace to see the MPLS Labels used between Charlie6 and Charlie7 and tweaking wireshark columns

[@mightncube3100]

This is probably the most clean, well structured explanation of Label switching, I liked the clarity on the sources of the Labels, Inner VPNv4 usually named service labels and the Transport labels, the Outer. Also the PHP part. Thank you so so much, I am now going to watch every video in this channe.

[@soumyasaraswat2963]

Thanks a lot for this amazing content.Working on MPLS for quite a bit of time but this made that conceptualy clear.

[@MrEDGE1984]

We need more teachers like you, amazing content and unique way of teaching, Thanks a lot teacher, you made this intricate topic really interesting and easy to understand. Subscribed!

[@NetworkingwithFish]

Thank you! You just totally made my day!

[@vetri10]

The Most underrated video in Networking L3 MPLS, it has every details of L3 VPN,Thankyou Fish :)

[@NetworkingwithFish]

My absolute pleasure! :)

[@Sathyaanarayanan]

Wow... awesome explanation. Thanks a lot :)

[@AmitPandey-bh7cy]

I knew all this before still I could not stop my self away from your video, none has taught they way you represented this Label swapping. I would request you to come with more conceptual video and same sort of lab. Please make more video on MPLS/Label stacking/LDP over RSVP, MPLS Trace, RSVP working and its Label.

[@NetworkingwithFish]

Wow... not sure how I missed this. Admittedly I do videos from what I am currently working on, playing with, studying on, etc. So right now it isn't MPLS stuff anymore. I am sure I'll get back to that again.

[@ThePintu333]

Absolutely brilliant !! great stuff ... Thank you

[@NetworkingwithFish]

My pleasure! Very glad you like it!

[@taojiang5076]

This is a really great video that i can find so far, I tried to understand how exactly MPLS VPN carry the inner information so that the peer router could forward the packets to the right Customer Router, unfortunately there is no many article talk about this, and I find this video is really helpful to understand how this inner label is carried over the label tunnel. thanks a lot!

[@NetworkingwithFish]

Absolutely my pleasure! :) Love that it helped you.

[@gopikannansubramani2815]

Thank you, Useful session.

[@1maheshvk]

Very informative

[@hannahk8620]

Your channel is my new favorite place on the internet! As a female junior engineer, it's so inspiring to see a women kicking ass in this field. It can feel like very male dominated at times. Thank you for the motivation, inspiration, and fantastic training :)

[@NetworkingwithFish]

:) My pleasure

[@identityloss4428]

good stuff. enjoyed the video learning.

[@tymofiidmytrenko3418]

Amazing stuff. Thank you very much. I had troubles understanding where the inner label comes from (and how it is being exchanged). Now the puzzle came together. Subscribed to your channel.

[@NetworkingwithFish]

:) So glad to be of help with that.

[@swapgaur]

pinch perfect explanation.as simple as it can get thankyou for sharing this video.

[@bloodd11]

Excellent Video. Thx you very much from Buenos Aires Argentina.

[@karthikr9484]

would like to know how vpn labels are allocated. its as prefix based or VRF based ?

[@aliTube86]

Would you see the RD and RT in a packet capture? Also, could you explain how the RD and RT is used while the traffic is being forwarded?

[@aniessaboulsoof]

thanksssssssssssssssss, another video please about VPLS.