A Lossless Path Restoration Method for Software-Defined Invulnerable Networks

Abstract

The invention discloses a method for recovering a lossless path of a software-defined survivable network, comprising the following steps: 1. Constructing a survivable network; the survivable network includes a network composed of SDN switches, a network survivable controller, a network survivable controller and all In the communication network between SDN switches, the network survivability controller is used for network transmission path planning, and the SDN switch forwards data according to the network flow table to realize end-to-end data transmission of the network; 2. Deploy a survivable network; 3. Detect network damage and perform Partial recovery; the network survivability controller obtains the working status of the SDN switch in real time, and when the SDN switch has a link damage, it performs partial recovery of the network damage; 4. Non-destructive recovery of the network damage; the network survivability controller performs non-destructive Recover until the end-to-end path hops are minimized. The method can realize fast destructive recovery, is compatible with traditional networks, and can meet application requirements with high network connectivity requirements in harsh environments.

Description

technical field [0001] The invention belongs to the technical field of computer network operation and maintenance, and in particular relates to a software-defined anti-destruction network lossless path recovery method. Background technique [0002] With the increase of the complexity of the network environment and the continuous increase of network applications, the traditional redundant backup technology may have the following problems: 1) In the redundant backup method based on routing, since the routing nodes need to exchange routing table information, the When the network scale is large, it is impossible to perform backup network switching in real time; 2) The survivability design based on 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, global network status information cannot be obtained, topology a...

AI Technical Summary

Problems solved by technology

[0002] 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

[0006] Common network recovery methods may cause packet loss, which is not suitable for application scenarios that require high network connectivity

Images