In LAN,with the planning of VR and VRRP construction,not only the network stability and reliability can be improved,but also the network flow share comes true,and the investment of the users is saved,so it has important application value.

In order to find a solution, the article discusses the definition, protocol and functions of virtual router and the IP VPN architecture method of virtual router, and mainly discusses three methods using virtual routers to connect and realize IP VPN, namely: the virtual router to the virtual router to pass the second floor; some virtual routers conn.

This paper gives a simple introduction of VPN concept and application advantages,and describes the basic principle and essential techniques based on virtual router VPN from IETF.

This model is based on the mechanism of virtual router, .

In order to reduce the registration frequency and the handoff latency in LEO satellite IP networks,a VMR-based handoff management scheme was presented.

In this paper,the authors first analyze and compare the existing technologies,and then put forward a new kind of load balancing technology based on virtual router clusters.