Hi jagen
sharing a sample config for reference. Assume you have two routers and you want to configure MPLS VPN between them,
Both routers are connected to two different customer Customer_A and Customer_B
---Cust_A----- ---Cust_A-----
PEA----PEB
---Cust_B---- ---Cust_B----
PE:
PEA#
ip vrf VPN_A
rd 9730:5182
route-target export 9730:5182
route-target import 9730:5182
maximum routes 5000 80
ip vrf VPN_B
rd 9730:5182
route-target export 9730:5183
route-target import 9730:5183
maximum routes 5000 80
Router bgp 9730
address-family ipv4 vrf VPN_A
no synchronization
bgp dampening
redistribute connected
redistribute static
exit-address-family
address-family ipv4 vrf VPN_B
no synchronization
bgp dampening
redistribute connected
redistribute static
exit-address-family
PEB#
PEB#
ip vrf VPN_A
rd 9730:5182
route-target export 9730:5182
route-target import 9730:5182
maximum routes 5000 80
ip vrf VPN_B
rd 9730:5182
route-target export 9730:5183
route-target import 9730:5183
maximum routes 5000 80
Router bgp 9730
address-family ipv4 vrf VPN_A
no synchronization
bgp dampening
redistribute connected
redistribute static
exit-address-family
address-family ipv4 vrf VPN_B
no synchronization
bgp dampening
redistribute connected
redistribute static
exit-address-family
This is very simple example of VPN, however there are many flavor like
1- You have to run MP-BGP in between PEA and PEB to send vpnv4 routes across cloud.
2- If you have any P router in between PEA and PEB then you need to run MPLS between them, in case 1 also
3- If you have more than two router then you have to run full mesh IBGP or introduce RR.
4- This VPN is example of MESH topology , config could be different for Hub and spoke topology or any hybrid topology
to answer all this it is required to know what is your requirement. also sharing document for reference
http://www.cisco.com/en/US/tech/tk436/tk428/technologies_configuration_example09186a00800a6c11.shtml
Regards
Mahesh
