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Flexible, extensible and safe inter-domain topology discovery method

A topology discovery and security technology, applied in the direction of climate sustainability, sustainable communication technology, advanced technology, etc., can solve problems such as slow convergence process, poor manageability and flexibility, topology discovery dependence, etc., to achieve enhanced scalability , improve security, improve flexibility

Active Publication Date: 2014-05-28
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

However, topology discovery depends on specific protocols, and the manageability and flexibility are poor, and because the update process depends on the routing algorithm, the convergence process is slow, resulting in other services not being able to obtain the latest network topology in time, and there are security holes

Method used

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  • Flexible, extensible and safe inter-domain topology discovery method
  • Flexible, extensible and safe inter-domain topology discovery method

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Embodiment Construction

[0026] The purpose and effects of the present invention will become more apparent by describing the present invention in detail below in conjunction with the accompanying drawings.

[0027] Based on the inter-domain topology discovery method in the existing SDN network, the present invention proposes a flexible, scalable and secure inter-domain topology discovery method, including the following steps:

[0028] Step 1: In the initial network, each OpenFlow switch (OFS) is connected to a software-defined network (SDN) controller, and all OFS managed by the same SDN controller form a domain, and each OFS has a network-wide unique identifier character (DataPathId); each domain has a unique domain number (Domain ID) in the entire network; each controller has a pair of public key / private key pair, and the private key is kept secret; each SDN controller maintains a The key store contains the public key / private key pair of this domain and the public keys of other domains, and the publ...

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Abstract

The invention discloses a flexible, extensible and safe inter-domain topology discovery method. On the basis of the existing software definition network inter-domain topology discovery method, through improving a link layer discovery?protocol data packet, a software definition network domain is discovered to be in topology connection with the adjacent software definition network domain in a distributed?software definition network. The method disclosed by the invention is simple and safe, and can successfully solve the problem of inter-domain topology discovery among a plurality of domains in the distributed?software definition network.

Description

technical field [0001] The invention relates to the technical field of software-defined networks, in particular to a flexible, scalable and secure inter-domain topology discovery method. Background technique [0002] In traditional networks, inter-domain topology discovery is implemented based on external gateway routing protocols such as BGP. Because traditional methods rely on specific protocols, the flexibility and manageability are poor, and topology discovery and routing calculation are combined. Scalability is poor. In the software-defined network (SDN), topology discovery is used as an independent module to provide a unified network view (Network View) interface for routing management and other services, and the network topology discovery is realized by using the inter-domain link layer discovery protocol (LLDP); the topology discovery module Maintain a consistent network view of the entire network in real time without relying on other services, effectively improving...

Claims

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Application Information

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IPC IPC(8): H04L12/751H04L45/02
CPCY02D30/00
Inventor 吴春明赵珊珊周伯阳
Owner ZHEJIANG UNIV
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