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Method for solving inter-domain link fault

A technology for inter-domain links and solutions, which is applied in the field of setting backup links when inter-domain links fail, and in the field of inter-domain link failure solutions, which can solve the problem of increasing the complexity of link protection schemes and reducing the effectiveness of real-time protection and other issues to achieve the effect of increasing security and effectiveness, simple configuration, and ensuring normal forwarding

Active Publication Date: 2010-02-17
TSINGHUA UNIV
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Problems solved by technology

Therefore, the existing two improved schemes will greatly increase the complexity of the link protection scheme and reduce the effectiveness of real-time protection, which are greatly limited in practical application

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  • Method for solving inter-domain link fault
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  • Method for solving inter-domain link fault

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Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] The main idea of ​​the inter-domain link failure protection method according to the present invention is: when a customer network adopts multi-homing technology to connect to a plurality of different ISP networks, the boundary router used for communication between the customer network and the ISP autonomous system network The interface address of the interface is allocated by the ISP autonomous system; the address prefix of the customer network is announced to the outside through different ISP autonomous systems, and different ISP autonomous systems announce the prefix information of the reachable Internet to the customer network, according to the configuration of the network According to the policy, the standard BGP protocol selects the main link used by the customer network to communicate with the external Internet; and the ne...

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Abstract

The invention discloses a method for solving an inter-domain link fault. The method uses a mode of statically configuring address information of a back-up link on a boundary router of a client networkand dynamically announcing the address information to a boundary router of an ISP network to realize the selection of the back-up link. Therefore, the method enables the client network and the ISP network to adopt the back-up link in time to carry out data transmission when a fault is generated in a main link, and therefore, the data loss possibly caused by the link fault can be effectively reduced, and the real-time protection of the data two-way transmission is realized, and the network status is kept to be stable. In addition, the method can also adopt a tunnel transmission mode to ensurethe validity of the data transmission in the back-up link.

Description

technical field [0001] The invention relates to a method for solving an inter-domain link failure, more specifically a method for setting a backup link when an inter-domain link fails, and belongs to the technical field of the Internet. Background technique [0002] When a customer network is connected to an ISP (Internet Service Provider) network through multiple external links, it can be connected to the same ISP network or multiple different ISP networks. This access method is called multi-homing technology. At present, this multi-homing access technology is widely used in the practice of connecting large enterprises and terminal ISP networks to the Internet. By accessing the Internet through multi-homing, users can improve network reliability and reduce network usage costs to a certain extent. [0003] However, during the implementation of the traditional multi-homing technology, because the customer network uses the standard BGP protocol (Border Gateway Protocol), when...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/56H04L45/28
Inventor 徐明伟李琦彭艳海李清
Owner TSINGHUA UNIV
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