Basic MPLS VPN Configuration
▀ Configuration of CE Routers
▄ Cisco ASR 903 Router Design and Deployment Guide
!
router bgp 100
bgp log-neighbor-changes
neighbor 10.10.3.3 remote-as 100 ! peering with ASR903-PE1
neighbor 10.10.3.3 update-source Loopback10
!
address-family ipv4 vrf CustomerA ! eBGP between PE and CE2 for
customerA
neighbor 192.168.40.2 remote-as 64101
neighbor 192.168.40.2 activate
exit-address-family
!
address-family ipv4 vrf CustomerB ! distribute OSPF into M-iBGP
redistribute ospf 42 match internal external 1 external 2
exit-address-family
Alternatively, the following configuration method can be used to define VRF, and those configurations apply to
6vPE too. This is the preferred method as it is easy to make it dual stack to support IPv6 as well.
vrf definition CustomerA ! define the VRF
rd 100:41
!
address-family ipv4
route-target export 100:41
route-target import 100:41
exit-address-family
interface GigabitEthernet0/1/0
description To CustomerA Site 1
vrf forwarding CustomerA ! put the interface under vrf CustomerA
Configuration of CE Routers
CE1-A Configuration
interface GigabitEthernet0/1/1
description to PE-1 interface
ip address 192.168.13.1 255.255.255.248
ip ospf dead-interval 3
ip ospf hello-interval 1
negotiation auto
router ospf 41 ! use OSPF as PC-CE protocol
network 172.16.0.0 0.0.255.255 area 41
network 192.168.13.0 0.0.0.255 area 41
interface Loopback110 ! routes to advertise out from CE1-A
ip address 172.16.0.1 255.255.255.0
ip ospf network point-to-point
interface Loopback111 ! routes to advertise out from CE1-A
ip address 172.16.1.1 255.255.255.0
ip ospf network point-to-point
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