MPLS VPN v1

Hi ! everyone on today session we are going to learn about MPLS VPN with the help of packet tracer v7.1 

Introduction

IP version 6 (IPv6) is a new version of IP designed to replace IP version 4 (IPv4), which is currently deployed and used extensively throughout the world. The benefits of IPv6 are primarily a result of its much larger addressing space, which is required to cope with the Internet expansion and with the explosion of Internet-capable appliances.

An IPv6 VPN is connected over an IPv6 interface or sub-interface to the Service Provider (SP) backbone via a PE router. The site can be both IPv4 and IPv6 capable. Each IPv6 VPN has its own address space which means a given address denotes different systems in different VPNs. This is achieved via a new address-family, VPN-IPv6 or VPNv6 address-family, which prep ends a Route Distinguishes (RD) to the IP address.

A VPNv6 address is a 24-byte quantity beginning with an 8-byte RD and ending with a 16-byte IPv6 address. When a site is IPv4 and IPv6 capable, the same RD can be used for the advertisement of both IPv4 and IPv6 addresses.

Note: For IPv6 Virtual Routing and Forwarding (VRF) support on some platforms (for example, the 7600 Series Router), you will need to configure mls ipv6 vrf in global configuration.

Now we are going to look over how to do ipv6 configuration in MPLS VPN with the topology given below as screenshot.

 

Configuration of VRF 

CE1 Router

ipv6 unicast-routing
ipv6 cef
!
interface Serial 0/0
 ipv6 address 2001:1::1/124
!
interface Loopback 0
 ipv6 address ABCD::1/128
!

CE2 Router

ipv6 unicast-routing
ipv6 cef
!
interface Serial 0/0
 ipv6 address 2001:2::1/124
!
interface Loopback 0
 ipv6 address ABCD::2/128
!

6VPE1 Router

ipv6 unicast-routing
ipv6 cef
!
mpls label protocol ldp
mpls ldp router-id Loopback 0 force

! !----- The VRF is defined with vrf definition <vrf-name> and is made IPv6 aware !

vrf definition CUST1
 rd 1:1
 !
 address-family ipv6
 route-target import 1:1
 route-target export 1:1
 exit-address-family
!
interface Serial 0/0
 vrf forwarding CUST1
 ipv6 address 2001:1::2/124
!
interface Loopback 0
 ip address 1.1.1.1 255.255.255.255
 ip ospf 1 area 0


6VPE2 Router

ipv6 unicast-routing
ipv6 cef
!
mpls label protocol ldp
mpls ldp router-id Loopback 0 force
!
vrf definition CUST1
  rd 1:1
 !
 address-family ipv6
 route-target import 1:1
 route-target export 1:1
 exit-address-family
!
interface Serial 0/0
 vrf forwarding CUST1
 ipv6 address 2001:2::2/124
!
interface Loopback 0
 ip address 3.3.3.3 255.255.255.255
 ip ospf 1 area 0
!







Therefore we have completed the lab session on IPv6 MPLS VPN.