MPLS VPN Torn apart

MPLS is one of the topic where there is too much entry barrier as far as information is concerned. You have to deal with new protocols, different label types, MP BGP, VRFs, etc. on top of the fact that we don’t get exposure to it in our day to day networking (except if you work for an ISP). When I was taught MPLS the first time, it was very difficult for me to visualize (I rely heavily on visualization to understand a topic) the flow as labels had been flying all over the place and pushed and popped and what not. So this is my attempt to explain MPLS VPN by tearing open the packets and showing you what takes place across the network. I will try my best to make it as graphical as possible. Continue reading