Research on the Configuration Method of Cross-domain VPN-OptionC Mode Based on RR

At present, single-domain MPLS VPN is widely used. In many services, MPLS VPN across multiple autonomous systems is required. Nowadays, three main cross-domain VPN technologies are used at home and abroad. This thesis mainly discusses the third VPN-OptionC used to reduce the burden of ASBR. In this paper a typical VPN-OptionC model is used to introduce the configuration methods and considerations in detail. Meanwhile, the configuration requirements and the ideas and methods for solving practical problems are analyzed. Finally, the corresponding configuration process and phase detection methods are proposed in order to reduce the number of failures.