Basic MPLS

This post is for new engineers, those who are learning MPLS L3 VPN. This post include a link of full lab with configuration files.

In this Lab vrf VPN_A from PE to CE , I used BGP and OSPF. For vrf VPN_B EIGRP and static. So Here you will find basic configuration of all protocols between CE to PE. Same time you will see the redistribution.

This topology I am going to use for configurations.

1.       R1 and R6 are in vrf VPN_A,R1 is using BGP to exchange the routes with PE-1 and R6 is using OSPF to share the routes with PE-2.

2.       R7 and R8 are in vrf VPN_B, R7 is using EIGRP to exchange the routes with PE-1 and R8 is using static routes with PE-2.

3.       In Core, OSPF is used as IGP.

4.       MP-IBGP is configured in PE-1 and PE-2.

Here is PE 1 and PE-2 configurations, Download full lab and configuration from link.

PE-1

hostname PE-1

!

boot-start-marker

boot-end-marker

!

!

no aaa new-model

memory-size iomem 5

ip cef

!

!

!

ip vrf VPN_A

 rd 100:1

 route-target export 100:1

 route-target import 100:1

!

ip vrf VPN_B

 rd 100:2

 route-target export 100:2

 route-target import 100:2

!

no ip domain lookup

!

mpls label protocol ldp

!

!

interface Loopback0

 ip address 100.1.1.1 255.255.255.255

!

interface FastEthernet0/0

 no ip address

 duplex auto

 speed auto

!

interface FastEthernet0/0.10

 encapsulation dot1Q 10

 ip vrf forwarding VPN_A

 ip address 10.1.1.2 255.255.255.252

!

interface FastEthernet0/0.30

 encapsulation dot1Q 30

 ip vrf forwarding VPN_B

 ip address 192.168.1.2 255.255.255.252

!

interface FastEthernet0/1

 ip address 172.16.1.1 255.255.255.252

 duplex auto

 speed auto

 mpls label protocol ldp

 mpls ip

!

!

router eigrp 200

 auto-summary

 !

 address-family ipv4 vrf VPN_B

 redistribute bgp 100 metric 256 20 200 100 20

 network 192.168.1.0 0.0.0.3

 no auto-summary

 autonomous-system 100

 exit-address-family

!

router ospf 1

 log-adjacency-changes

 network 100.1.1.1 0.0.0.0 area 0

 network 172.16.1.0 0.0.0.3 area 0

!

router bgp 100

 bgp log-neighbor-changes

 neighbor 100.1.1.3 remote-as 100

 neighbor 100.1.1.3 update-source Loopback0

 !

 address-family ipv4

 neighbor 100.1.1.3 activate

 neighbor 100.1.1.3 next-hop-self

 no auto-summary

 no synchronization

 exit-address-family

 !

 address-family vpnv4

 neighbor 100.1.1.3 activate

 neighbor 100.1.1.3 send-community extended

 neighbor 100.1.1.3 next-hop-self

 exit-address-family

 !

 address-family ipv4 vrf VPN_B

 redistribute eigrp 100

 no synchronization

 exit-address-family

 !

 address-family ipv4 vrf VPN_A

 neighbor 10.1.1.1 remote-as 200

 neighbor 10.1.1.1 activate

 no synchronization

 exit-address-family

!

ip http server

no ip http secure-server

!

!

control-plane

!

line con 0

line aux 0

line vty 0 4

!

!

end

PE-2:

hostname PE-2

!

boot-start-marker

boot-end-marker

!

!

no aaa new-model

memory-size iomem 5

ip cef

!

!

!

!

ip vrf VPN_A

 rd 100:1

 route-target export 100:1

 route-target import 100:1

!

ip vrf VPN_B

 rd 100:2

 route-target export 100:2

 route-target import 100:2

!

no ip domain lookup

!

mpls label protocol ldp

!

interface Loopback0

 ip address 100.1.1.3 255.255.255.255

!

interface FastEthernet0/0

 ip address 172.17.1.2 255.255.255.252

 duplex auto

 speed auto

 mpls label protocol ldp

 mpls ip

!

interface FastEthernet0/1

 no ip address

 duplex auto

 speed auto

!

interface FastEthernet0/1.20

 encapsulation dot1Q 20

 ip vrf forwarding VPN_A

 ip address 20.1.1.2 255.255.255.252

!

interface FastEthernet0/1.40

 encapsulation dot1Q 40

 ip vrf forwarding VPN_B

 ip address 192.168.2.2 255.255.255.252

!

!

router ospf 2 vrf VPN_A

 log-adjacency-changes

 redistribute bgp 100 subnets

 network 20.1.1.0 0.0.0.3 area 0

!

router ospf 1

 log-adjacency-changes

 network 100.1.1.3 0.0.0.0 area 0

 network 172.17.1.0 0.0.0.3 area 0

!

router bgp 100

 no synchronization

 bgp log-neighbor-changes

 neighbor 100.1.1.1 remote-as 100

 neighbor 100.1.1.1 update-source Loopback0

 neighbor 100.1.1.1 next-hop-self

 no auto-summary

 !

 address-family vpnv4

 neighbor 100.1.1.1 activate

 neighbor 100.1.1.1 send-community extended

 neighbor 100.1.1.1 next-hop-self

 exit-address-family

 !

 address-family ipv4 vrf VPN_B

 redistribute connected

 redistribute static

 no synchronization

 exit-address-family

 !

 address-family ipv4 vrf VPN_A

 redistribute ospf 2 vrf VPN_A

 no synchronization

 exit-address-family

!

ip route vrf VPN_B 6.6.6.6 255.255.255.255 192.168.2.1

!

!

ip http server

no ip http secure-server

!

!

control-plane

!

!

line con 0

line aux 0

line vty 0 4

!

!

end

LAB Link :
http://www.ziddu.com/download/11368307/basicmpls.rar.html

I hope this lab will helpful for beginners.Post comments for any queries.