VFR
Each customer has its own VRF so that they have overlapping networks, a route distinguisher (RD) distinguishes one set of routes (one VRF) from another When VPN routes are advertised among PE routers via MP-BGP, the RD is included as part of the route along with the IP prefix. ip vrf Site_A rd 65000:10 ! ip vrf Site_B rd 65000:20 ! ip vrf Site_C rd 65000:30 Whereas route distinguishers are used to maintain uniqueness among identical routes in different VRFs, route targets can be used to share routes among them. We can apply route targets to a VRF to control the import and export of routes among it and other VRFs. ip vrf Customer_A rd 65000:100 route-target export 65000:100 route-target import 65000:100 You can use the shortcut command route-target both as a macro to add both commands simultaneously.