For the PE router to distribute VPN-related routes to and from connected CE routers, you must configure routing within the VPN routing instance. You can configure a routing protocol—BGP, Open Shortest Path First (OSPF), or Routing Information Protocol (RIP)—or you can configure static routing. For the connection to each CE router, you can configure only one type of routing.
The following sections explain how to configure VPN routing between the PE and CE routers: