Configuring a Basic MPLS VPN

It's been a long time I'm away from blogging due to some R&D on the network with Juniper boxes. On this tutorial I'm going to configure very basic MPLS VPN configuration in GNS3. After that we go for EoMPLS configuration.

This is the logical topology for this tutorial.

 

Here I only post the configuration file from PE other router configuration is almost same. Here is the points should be remember.

1. Make sure IGP with MPLS is configure on PE,P, it shouldn't be configure on customer facing interface.

2. Make sure all loopback interface is reachable. 

3. Configure VRF with RD and RT, then applied it on right interface.

4. Configure MP-BGP on PE and peer it.

5. Make sure to redistribute the CE IGP protocol into the BGP and vice versa.

Below command can be copy paste into your router. Before that make sure you had make change necessary things.

Config from PE1

PE1#sh run
Building configuration...

Current configuration : 2126 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname PE1
!
ip cef
ip tcp synwait-time 5
!
!
!
!
ip vrf CustA
 rd 100:1
 route-target export 1:100
 route-target import 1:100
!
no ip domain lookup
!
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
 ip ospf network point-to-point
 ip ospf 1 area 0
!
interface FastEthernet0/0
 ip address 192.168.11.2 255.255.255.252
 ip ospf 1 area 0
 duplex auto
 speed auto
 mpls ip
!
interface FastEthernet0/1
 ip vrf forwarding CustA
 ip address 192.168.13.1 255.255.255.252
 duplex auto
 speed auto
!
!
router eigrp 1
 auto-summary
 !
 address-family ipv4 vrf CustA
 redistribute bgp 1 metric 1500 2000 200 100 15000
 network 192.168.13.0
 no auto-summary
 autonomous-system 100
 exit-address-family
!
router ospf 1
 log-adjacency-changes
!
router bgp 1
 no synchronization
 bgp log-neighbor-changes
 neighbor 3.3.3.3 remote-as 1
 neighbor 3.3.3.3 update-source Loopback0
 no auto-summary
 !
 address-family vpnv4
 neighbor 3.3.3.3 activate
 neighbor 3.3.3.3 send-community both
 exit-address-family
 !
 address-family ipv4 vrf CustA
 redistribute eigrp 100
 no auto-summary
 no synchronization
 exit-address-family

 =============

CE1#ping 192.168.24.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.24.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/70/92 ms

CE1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     192.168.13.0/30 is subnetted, 1 subnets
C       192.168.13.0 is directly connected, FastEthernet0/1
     192.168.24.0/30 is subnetted, 1 subnets
D       192.168.24.0 [90/307200] via 192.168.13.1, 00:50:22, FastEthernet0/1