Method, device and system for engaging second layer network and third layer network

Abstract

The present invention discloses a method, a device and a system for connecting a two-layer network and a three-layer network, which solves the problems that when the two-layer network and the three-layer network are connected, the networking cost is high, and the network structure is complex. A two-layer virtual interface or a three-layer virtual interface receives a data message, and finds out a corresponding three-layer virtual interface or two-layer virtual interface in a binding mapping table of the two-layer or three-layer virtual interface, according to a two-layer virtual interface identifier or a three-layer virtual interface identifier, the three-layer virtual interface or the two-layer virtual interface transmits the data message sent by the two-layer virtual interface or the three-layer virtual interface. The present invention realizes the communication of the data message between the two-layer network and the three-layer network by using only one terminal access device on the two-layer network and the three-layer network, compared with the prior art, one network device is saved, the networking cost is reduced, and the flexibility and the reliability of the networking are improved. The present invention can be applied in the connection between an MPLS L2VPN network and an MPLS L3VPN network.

Description

technical field [0001] The present invention relates to a method, device and system for network interconnection, in particular to a method for realizing the interconnection between an MPLS L2VPN (Multi-Protocol Label Switching Layer 2 Virtual Private Network) network and an MPLS L3VPN (Multi-Protocol Label Switching Layer 3 Virtual Private Network), devices and systems. Background technique [0002] With the development of network technology, in order to meet the needs of different users and different business volumes, various networking technologies emerge in an endless stream. The communication process between MPLS L2VPN network and MPLS L3VPN network commonly used today is shown in Fig. 1 . The communication process between the MPLS L2VPN network and the MPLS L3VPN network of the data packet sent by CE1 (Customer Edge, user edge device) is described below as an example: [0003] Referring to accompanying drawing 1, data message needs to pass through MPLS L2VPN network a...

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned method for realizing the interconnection between the Layer 2 network and the Layer 3 network is to connect the MPLS L2VPN network and the MPLSL3VPN network through two operator edge devices PE2 and PE3, so as to achieve the purpose of connecting the MPLS L2VPN network and the MPLS L3VPN network. This method of connecting the network will cause problems such as high networking cost, poor networking flexibility and poor reliability when the two-layer network and the three-layer network are connected.

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