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Full mesh MPLS VPN Deployment Guide

Latest reply: Dec 21, 2018 08:22:26 2155 3 10 0 0

Hello, Community friends!


This post features a full mesh MPLS VPN deployment guide. Please have a look below for more information on the topic.


BACKGROUND INFORMATION


This model is also known as any-to-any VPN topology. It is the basic MPLS VPN. In this topology, all the PE can communicate directly with each other. Any PE can learn the other PE routing directly.


The topology is as per below figure.


Figure 1-1. VPN full-mesh topology                                              085719wzeu60ukuoc0vjuu.jpg



As shown in the above figure, the PE1, PE2 and PE3 have the same VRF and can communicate with each other through the MPLS backbone network.


FULL-MESH SERVICE DEPLOYMENT


For the full-mesh VPN service deployment, we can refer to these steps as below:


  • create the IP VPN-Instance;


  • enable the IPv4 or IPv6 address family for the VPN instance. A VPN instance supports the IPv4 and IPv6 address families. You need to run the ipv4-family (VPN instance view) or ipv6-family (VPN instance view) command to enable the IPv4 or IPv6 address family based on the type of the protocol stack used to advertise VPN routes in the VPN instance;


  • configure a Route Distinguisher (RD) for the IPv4 or IPv6 address family of the VPN instance. You are allowed to perform VPN configurations in the address family view only after using the route-distinguisher command to configure an RD for the address family;


  • configure a VPN target for the IPv4 or IPv6 address family of the VPN instance using the VPN-target command. VPN targets control route learning between VPN instances;


  • configure the ipv4-family on the BGP and bind the VPN-Instance;


  • bind the VPN instance to a VPN-connected interface on the PE using the ip binding VPN-instance command.


For example, there is one VPN-Instance whose name is blue and we can configure it as per below.


Figure 1-2. Full-mesh VPN configuration example

#

ip VPN-instance blue                      //create the VPN-Instance

 ipv4-family                              //enable the   ipv4-family

  route-distinguisher   65001:1000            //set the RD

  VPN-target 65001:1000   export-extcommunity //set the RT, use the same value with RD

  VPN-target 65001:1000   import-extcommunity

#

bgp 65000     

 #

ipv4-family VPN-instance blue         //enable the BGP VPN-family

  import-route direct 

#

interface GigabitEthernetx/x/x.y       //bind it on the sub-interface

 ip binding VPN-instance blue

#


This would be everything on the full mesh MPLS VPN deployment guide. Hope you enjoyed reading this post!

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YOO
Created Dec 21, 2018 02:52:46

This picture make us easy to understand the VPN Full-Mesh Topology
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  • x
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Hain
Created Dec 21, 2018 06:53:55

How to avoid the loop?
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  • x
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user_2915719
Created Dec 21, 2018 08:22:26

The route distinguisher seems a critical parameter here. Thanks for sharing.
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  • x
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