Method for raising service reliability in virtual private network, system thereof and access apparatus

A virtual private network and reliability technology, applied in transmission systems, digital transmission systems, network interconnection, etc., can solve problems such as high requirements for maintenance personnel, large configuration, mismatched and missing configurations, etc., to achieve business continuity, Avoid routing vibration and improve user experience

Inactive Publication Date: 2012-07-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to realize different VPN user traffic forwarding based on tunnels or direct links between the active and standby BNGs, the current method is to configure static routes for each VPN, that is, add a tunnel route or direct link to the routing table of each VPN. The route is used as the default route. When the downlink of the active BNG causes the user route to be unreachable, the user traffic is forwarded to the backup BNG through the default route. Each VPN must be configured separately, and there is a risk of mismatch and omission

Method used

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  • Method for raising service reliability in virtual private network, system thereof and access apparatus
  • Method for raising service reliability in virtual private network, system thereof and access apparatus
  • Method for raising service reliability in virtual private network, system thereof and access apparatus

Examples

Experimental program
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Embodiment 1

[0062] figure 2 It is a flowchart of a method for improving service reliability in a virtual private network according to Embodiment 1 of the present invention, such as figure 2 As shown, the link state detection between the two BNGs (active BNG and backup BNG) is performed with the Bidirectional Forwarding Detection (BFD, Bidirectional Forwarding Detection) protocol, and the Virtual Router Redundancy Protocol (VRRP, Virtual Router Redundancy Protocol) protocol is used. BNG master-standby state negotiation, user information backup is performed between the master device and the backup device, where BNG1 is the master device and BNG2 is the backup device. In this example, the standby BNG advertises routing information to the active BNG before the downlink of the active BNG fails. In this example, the method for improving service reliability in a virtual private network specifically includes the following steps:

[0063] Step 201, a TCP connection is established between BNG1 ...

Embodiment 2

[0072] image 3 It is a flowchart of a method for improving service reliability in a virtual private network according to Embodiment 2 of the present invention, such as image 3 As shown, the BNG protocol is used to detect the link state between the two BNGs, and the virtual router redundancy protocol (VRRP, Virtual Router Redundancy Protocol) protocol is used to negotiate the active and standby state of the BNG. Information backup, where BNG1 is the main device and BNG2 is the backup device. The difference between this example and the above example is that the standby BNG advertises routing information to the active BNG after the downlink of the active BNG fails. In this example, the method for improving service reliability in a virtual private network specifically includes the following steps:

[0073] Step 301, establishing a TCP connection between BNG1 and BNG2 as a message channel for backing up online user information (including VPN user information);

[0074]Step 302...

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Abstract

The invention discloses a method for raising service reliability in a virtual private network (VPN). A main BNG and a standby BNG are set in the VPN, and a user is accessed to the VPN through an access network and the main BNG. The method comprises the following steps: VPN user information is backed up between the main BNG and the standby BNG; the standby BNG generates route information of a VPN user according to the VPN user information, and sends the route information to the main BNG; after the main BNG confirms a downlink fault of the VPN user, when a downlink flow of the VPN user is received, according to the VPN user route information published by the standby BNG, the downlink flow is sent through the standby BNG. The invention simultaneously discloses a system for realizing the above method and an access apparatus in the virtual private network. According to the method, the system and the apparatus in the invention, the service continuity of the VPN user is realized, simultaneously there is no need to change the VPN user route information in the VPN, and route oscillation is avoided.

Description

technical field [0001] The present invention relates to the redundancy technology of the broadband network gateway BNG in a virtual private network (VPN, Virtual Private Network), in particular to a method and system for improving service reliability in a virtual private network (VPN, Virtual Private Network), and, virtual An access device in a private network. Background technique [0002] In the traditional enterprise network configuration, the traditional method for the interconnection between different local area networks is to rent a digital data network (DDN, Digital Data Network) leased line or frame relay. Such a communication solution will inevitably lead to high network communication / maintainance fee. Virtual private network refers to the technology of establishing a dedicated data communication network in a public network by relying on Internet service providers (ISP, Internet Service Provider) and other network service providers (NSP, Network Service Provider)....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/46H04L12/56H04L45/586
CPCH04L12/4641
Inventor 范亮冷通陈勇袁博
Owner ZTE CORP
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