Software-definition survivable network construction method

Abstract

The invention discloses a software-definition survivable network construction method. The method is mainly used to solve problems of poor survivability and long survivability recovery time in the prior art. The method is characterized in that through thinking of software definition network logic, forwarding separation and centralized management and control, firstly, a survivability controller is used to collect network topologies and reasonably program a network route; secondly, when the network is damaged, the survivability controller replans the network route according to a damaged node, a link and an area in real time so as to realize a network survivability ability. In the invention, two kinds of survivability recovery algorithms are provided. The two kinds of survivability recovery algorithms comprise shortest path recovery and fastest speed recovery. The shortest path recovery can guarantee that network end-to-end is a shortest path and the fastest speed recovery can guarantee that recovery time is shortest. Through using the method to establish the survival network, rapid survivability recovery can be realized and compatibility with a traditional network can be guaranteed. An application demand of a high network connectivity requirement under severe environments of natural disasters, military application and the like can be satisfied.

Description

technical field [0001] The invention relates to the technical field of computer network security, in particular to a method for constructing a software-defined indestructible network. Background technique [0002] Network invulnerability refers to the ability to tenaciously provide services to users after the communication network suffers a fault and some nodes or lines fail. Redundant backup is the main way to solve the problem of network invulnerability. According to the survivability application requirements, establish a survivability measurement model to measure and evaluate the network survivability, and make the network survivability meet the application requirements by adding node or link backup. The form of backup can be fully redundant backup, that is, the backup link is put into use when the normal link fails; it can also be shared redundant backup, that is, all links are put into use equally, and when a link fails, the routing protocol Complete real-time dynamic...

AI Technical Summary

Problems solved by technology

[0003] With the increase of the complexity of the network environment and the continuous increase of network applications, the following problems may occur in the traditional redundant backup technology: 1) In the redundant backup method based on routing, since the routing nodes need to exchange routing table information, it is difficult In the case of a large-scale network, it is impossible to switch the backup network in real time; 2) The survivability design based on the network topology cannot distinguish the importance of information flow, so it cannot guarantee the operation of core important services when the network is damaged; 3) Routing information Distributed on each routing node, the global network status information cannot be obtained, the topology adjustment can only be performed locally, and the impact of the adjustment cannot be quickly and accurately obtained

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