在谷歌上找了一下...Cisco 原廠網站裡有一些資料可以參考.
Route Leaking in MPLS/VPN Networks
http://www.cisco.com/en/US/tech/tk436/tk832/technologies_configuration_example09186a0080231a3e.shtml
Introduction to Cisco MPLS VPN Technology
http://www.cisco.com/en/US/docs/net_mgmt/vpn_solutions_center/1.1/user/guide/VPN_UG1.html