Network communication method and system

Abstract

The invention provides a network communication method and a system. The network communication method includes the following steps that (1) ring networks of a plurality of provide edge (PE) devices are created; (2) messages are received and analyzed; (3) whether link failure exists on the ring networks is detected, if the failure exists, a protective switching mechanism is started and a ring protective link is arranged in a smooth state, and if the failure does not exist, a current working state is kept; (4) and the messages are forwarded to the corresponding PE devices through the ring networks and then forwarded to an assigned customer edge (CE) device through the PE devices according to a destination address of forwarding of the messages. According to the network communication method and the system, all the PE devices are interconnected in a ring-network mode, a ring master node is arranged to prevent network data from forming a ring, and the ring network link failure is placed through the ring protective switching mechanism. Message multicasts of the ring networks of the network communication method and the system can be transmitted among all the PE devices in a public network. Compared with a full-connection type network, the network communication method and the system avoid waste of network broadband.

Description

Technical field [0001] The present invention relates to the field of network communication, in particular to a VPLS network communication method and system for prohibiting "horizontal split". Background technique [0002] Virtual Private LAN Service (VPLS) is a Layer 2 virtual private network (Virtual Private Network, VPN) technology based on Ethernet. VPLS technology integrates the advantages of Ethernet and Multi-Protocol Label Switching (MPLS). It enables user networks dispersed in different geographical locations to communicate with each other. [0003] Participate figure 1 As shown, the virtual private LAN includes multiple provider edge routers (Provider Edge, PE) and customer edge routers (Customer Edge, CE) interconnected with these PE devices. Among them, each PE device passes through a pseudo circuit (Pseudo- Wire, PW) to transmit data frames, and between the PE device and each CE device through a certain access link (Attachment Circuit, AC) to transmit data frames. In ...

AI Technical Summary

Problems solved by technology

[0004] However, in the above technologies, for multicast packets or broadcast packets, the packets often need to be forwarded from one PE device to other multiple PE devices. For such applications, the VPLS "full connection" method requires the same packet It is copied in multiple copies to be sent to multiple PE devices, thus causing a great waste of network bandwidth

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