System and method for virtual special net user to access public net

Abstract

The method comprises: the VPLS users in virtual private LAN network segment accesses public network through client edge (CE) device and provider edge (PE) device; the public network IP address is set in the interface of connecting CE and PE; a CE public gateway is connected to the interface of connecting CE and PE in order to make message transmission between VPLS user and public network. By the invention VPLS users can access public network.

Description

Technical field [0001] The invention relates to the technical field of network communication, in particular to a system and method for a virtual private network user to access the public network. Background technique [0002] VPLS (Virtual Private LAN Segments) is a VPN service. Its main function is to interconnect the LAN network segments of different locations in an enterprise to make it a large LAN. Typical VPLS network diagram As shown in Figure 1. [0003] In Figure 1, the network topology of VPLS is similar to that of VPRN (virtual routing network). PE devices are fully connected through tunnels, except that the edge nodes of VPRN complete the three-layer routing function, while the edge nodes of VPLS complete the second The layer bridging function can realize address learning, broadcasting and other functions. In this way, a local area network running layer 2 protocol is virtualized through VPLS, which brings a big advantage-completely transparent to layer 3 protocol, suit...

AI Technical Summary

Problems solved by technology

Access to the Internet through MPLS L3VPN has been widely used, but access to the Internet through VPLS has not been resolved

For VPLS applications, the lack of access to the Internet obviously cannot meet the growing needs of VPN users to access the Internet

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