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Method for realizing two-layer VPN and three-layer VPN interconnecting and interworking

An implementation method and interconnection technology, which are applied in the implementation field of Layer 2 virtual private network and Layer 3 VPN interconnection, can solve problems such as interconnection, and achieve the effect of simple realization.

Inactive Publication Date: 2007-11-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The problem of how the newly created L3 VPN users can communicate with the existing L2 VPN users
[0008] 2. The problem of how the newly created L2 VPN users can communicate with the existing L3 VPN users

Method used

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  • Method for realizing two-layer VPN and three-layer VPN interconnecting and interworking
  • Method for realizing two-layer VPN and three-layer VPN interconnecting and interworking
  • Method for realizing two-layer VPN and three-layer VPN interconnecting and interworking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The present invention is based on the existing version of the router, that is, on the basis of the current router realizing various services, and solves this problem with a simple and practical engineering method. The implementation method of Layer 3 VPN interconnection and the specific principle and data forwarding process of Layer 2 VPN and Layer 3 VPN traffic interconnection.

[0056] The first case: the implementation method of Layer 2 VPN and Layer 3 VPN that need to be interconnected on the same PE router.

[0057] As shown in Figure 1, when the VPN Layer 2 users and Layer 3 users that need to communicate are all on the same PE router, the method steps are as follows:

[0058] Step 1: Select two interfaces A and B on the router. For example, two interfaces of the same media type are represented by InterfaceA and Interface B respectively. Then connect Interface A and Interface B with a crossover cable or optical cable of the interface medium type. The purpose is ...

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Abstract

The method includes steps: selecting two interfaces A and B connected to each other in one PE router; placing interface A on VFI instance in same two-layer VPN of PE router needed to connected to three-layer VPN each other; placing interface B on VRF instance in same three-layer VPN of PE router needed to connected to two-layer VPN each other; then, allotting one IP address of three-layer VPN for interface B in PE router; the said address and user's IP address in two-layer VPN are in same sub network; the method configures IP gateway for users of two-layer VPN, and address of the network gateway is pointed to address of the interface B of PE router. The invention realizes interconnection and intercommunication between two-layer VPN and three-layer VPN on or not on same PE router. Features are: simple operation, no need of adding new device by operation manager, and no influence on operated network, users on three-layer VPN, and users on two-layer VPN.

Description

technical field [0001] The present invention relates to the routing technology in the communication network, and in particular to a method for realizing the interconnection and intercommunication between a layer-2 virtual private network (Virtual Private Network, hereinafter referred to as VPN) and a layer-3 VPN. Background technique [0002] VPN service is one of the most potential new generation telecom services. The technology of implementing VPN based on Multi-Protocol Label Switching (hereinafter referred to as MPLS) network has greatly improved the defects of traditional Internet Protocol (Internet Protocol, hereinafter referred to as IP) network, and at the same time it can provide Mode (ASYNCHRONOUS TRANSMIT MODE, referred to as ATM) network security, well adapted to the needs of VPN services. The traditional IP network performs the third-layer routing search at each routing node, and the delay of the total traffic network is relatively large; the traditional IP net...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/66H04L12/56H04L12/46H04Q3/00H04L12/715
Inventor 马汝胜朱超国伏朝晖许生海
Owner ZTE CORP