System based on two layer VPN foreign medium communication and method thereof

Abstract

The invention provides a heterogeneous medium intercommunication system and method based on two-layer VPN, and its kernel: local PE is connected through two-layer switching device with at least a local CE, ARP agent in the local PE terminates ARP request of remote CE, does not sends any ARP response to the ARP request and learns ARP according to the ARP request; message transmission module in the local PE packs IP message in local CE message into MPLS message and transmits the MPLS message to remote PE, packs IP message in remote CE message transmitted by the remote PE into two-layer Ethernet message, and transmits the two-layer Ethernet message to the local CE according to the ARP information learnt by the ARP agent. And the invention implements enterprise network remote interconnection for medium-sized and small enterprises, especially applied to hub-spoke-like point-to-point heterogeneous medium intercommunication, achieving the purpose of point-to-point two-layer VPN-based heterogeneous medium intercommunication of two-layer broadcasting networks.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a system and method for intercommunication of heterogeneous media based on Layer 2 VPN. Background technique [0002] MPLS L2VPN (Multiprotocol Label Switching Layer 2 Virtual Private Network) provides Layer 2 VPN services based on MPLS networks. MPLS L2VPN enables operators to provide Layer 2 VPN services of different media on a unified MPLS network. The different media here include ATM (Asynchronous Transfer Mode), FR (Frame Relay), VLAN (Virtual Local Area Network), Ethernet (Ethernet), PPP (Point-to-Point Protocol), etc. [0003] In MPLS L2VPN, the concepts of CE (Customer Edge Equipment), PE (Provider Edge Equipment), and P (Provider Equipment) are similar to those in BGP / MPLS L3VPN (Border Gateway Protocol / Multiprotocol Label Switching Layer 3 Virtual Private Network) The concept is the same, and the principle of operation is basically the same. [0004] MPL...

AI Technical Summary

Problems solved by technology

[0011] From the above description, it can be known that the current networking mode of MPLS L2VPN heterogeneous media intercommunication can only realize point-to-point heterogeneous media intercommunication, and when the local CE and PE adopt CCC (circuit cross-connect) remote connection mode or SVC (switched virtual circuit) connection mode When connecting, L2VPN heterogeneous media intercommunication cannot be realized; moreover, since the PE does not dynamically update the MAC address learned by ARP when receiving the IP packet from the remote CE, the Ethernet interface of the PE needs to be configured with the MAC address of the remote CE. Address information, or use static ARP to set the MAC address information of the remote CE. The configuration process is complicated. If the CE replaces the network card or board, the MAC address information of the CE must be reconfigured on the PE. Otherwise, the L2VPN service will be caused. Inaccessible, so that the maintainability of L2VPN is poor, and it is not convenient to activate the actual L2VPN service

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