A method and system for interworking between an SDN network and a traditional IP network

Abstract

The invention discloses a method and system for intercommunicating between an SDN network and a traditional IP network. The method includes the following steps: specifying a boundary interface and creating a flow entry; receiving a message through the boundary interface, and according to the flow table, if the boundary interface matches the protocol message, then the message is sent to the SDN control layer; according to the flow table, the message received by the control layer is distributed, and if it is a routing protocol message matching the flow table item, it will enter the next step; the routing protocol message generation system The core routing table is combined with the inflow table and delivered to the SDN data plane. The system includes: an initialization device, a data forwarding device, a data splitting device and a routing protocol processing device. The invention enables the SDN network to seamlessly communicate with the traditional IP network and minimizes the impact on the routing planning of the original network, contributes to the popularization and application of the SDN technology networking scheme, and accelerates the replacement of the traditional IP network by the SDN network.

Description

technical field [0001] The present invention relates to the SDN technology in the field of data communication, in particular to a method and system for the intercommunication between the SDN network and the traditional IP network. Background technique [0002] Each network element in a traditional IP data communication network is an independent autonomous system, with its own management plane, control plane, and forwarding plane. Very tedious and error-prone. In order to improve this situation, academia and industry have begun research and deployment of Software Defined Networks (SDN for short). [0003] SDN network is an emerging networking method, which makes the network programmable and relies on application programs to manage network operation and maintenance. SDN network can solve the complexity of the network in an abstract way, and is gradually changing the deployment method of data centers. and management methods will be gradually extended to other application fiel...

AI Technical Summary

Problems solved by technology

[0011] The promotion and application of SDN is similar to the replacement of IPv4 by IPv6. It is a gradual process. In the initial stage of promotion and application, it inevitably involves interconnection with traditional IP networks. The networking scheme of SDN should minimize the routing planning of the original IP network. The influence makes it easier to deploy, which in turn helps it obtain a large number of applications to accelerate the replacement of traditional IP networks, such as figure 1 It is an indication of the phased promotion and deployment of SDN; the promotion and application of SDN networks usually needs to start from a relatively independent area in the large network, such as the access network / convergence network of the data center, so this area and other areas will inevitably be involved How to interconnect and intercommunicate, if only using the characteristics of the SDN network itself to realize the transmission of IP packets, then it will inevitably face the problem of re-planning and designing network routes, which will have a greater impact on non-SDN domains, thereby affecting Promotion and Application of SDN Networking Technology

[0012] For the interconnection between SDN network and external network, the current research only involves the information exchange between SDN domain controllers, that is, SDN inter-domain communication, and does not involve the interconnection between SDN network and traditional IP network; SDN inter-domain communication can only The information that needs to be communicated between the interactive controller and the application program cannot realize the smooth transition of the routing protocol according to the original routing plan, such as figure 2 is the SDN inter-domain communication topology, image 3 Is the SDN inter-domain communication logic

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