Method, system, and access device for improving service reliability in virtual private network

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 amount of configuration, mismatched and missing configurations, etc., to improve user experience and realize Business continuity and the effect of avoiding route flapping

Inactive Publication Date: 2017-06-27
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, system, and access device for improving service reliability in virtual private network
  • Method, system, and access device for improving service reliability in virtual private network
  • Method, system, and access device for improving service reliability in virtual private network

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 the first embodiment of the present invention, such as figure 2 As shown, two BNGs (primary BNG and standby BNG) use Bidirectional Forwarding Detection (BFD) protocol for link state detection, and use Virtual Router Redundancy Protocol (VRRP, Virtual Router Redundancy Protocol) protocol for B NG The active and standby status is negotiated, and user information is backed up between the active device and the standby device. BNG1 is the active device and BNG2 is the standby device. In this example, the backup BNG advertises routing information to the main BNG before the downlink of the main BNG fails. The method for improving service reliability in a virtual private network in this example specifically includes the following steps:

[0063] Step 201: Establish a TCP connection between BNG1 and BNG2 as a message channel for backing up online user information (in...

Embodiment 2

[0072] image 3 It is a flowchart of a method for improving service reliability in a virtual private network according to the second embodiment of the present invention, such as image 3 As shown, two BNGs use the BFD protocol for link state detection, use the Virtual Router Redundancy Protocol (VRRP, Virtual Router Redundancy Protocol) protocol for B NG active and standby state negotiation, and perform user information between the active device and the standby device For backup, 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. The method for improving service reliability in a virtual private network in this example specifically includes the following steps:

[0073] Step 301: Establish a TCP connection between BNG1 and BNG2 as a message channel for backing up online user information (including VPN u...

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Abstract

The invention discloses a method for improving service reliability in a virtual private network. A main BNG and a standby BNG are set in the VPN, and users access the VPN through the access network and the main BNG; including: setting the main BNG and the main BNG Backup VPN user information between the backup BNGs; the backup BNG generates VPN user routing information according to the VPN user information, and sends it to the active BNG; after the active BNG confirms that the downlink of the VPN user is faulty, it receives For downlink traffic to the VPN user, the downlink traffic is sent through the backup BNG according to the VPN user routing information published by the backup BNG. The invention also discloses a system for realizing the above method and an access device in the virtual private network. The invention realizes the service continuity of the VPN user, and at the same time, does not need to change the VPN user routing information in the VPN, and avoids routing shock.

Description

Technical field [0001] The present invention relates to the redundancy technology of a broadband network gateway BNG in a virtual private network (VPN, Virtual Private Network), in particular to a method and a system for improving service reliability in a virtual private network (VPN, Virtual Private Network), and a virtual Access device in the private network. Background technique [0002] In the traditional enterprise network configuration, the interconnection between remote LANs is required. The traditional method is to rent a digital data network (DDN, Digital Data Network) dedicated line or frame relay. Such a communication scheme will inevitably lead to expensive network communication / Maintenance costs. Virtual private network refers to the technology that relies on Internet service providers (ISP, Internet Service Provider) and other network service providers (NSP, Network Service Provider) to establish a dedicated data communication network in a public network. In a vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/713H04L12/24H04L12/46H04L45/586
CPCH04L12/4641
Inventor 范亮冷通陈勇袁博
Owner ZTE CORP
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