A method for forwarding and synchronizing control plane entries, flow tables and various forwarding entries in SDN

Abstract

The invention discloses a synchronization method for control plane table items, a flow table and various forwarding table items in an SDN. Aiming at table synchronization between a control plane and a plurality of data planes in the SDN network, the method comprises the following steps of generating an SDN service carrying network by performing forwarding table management configuration and distribution on physical nodes of the data planes; keeping the flow table between control plane nodes and data plane nodes, and a forwarding table consistent during a synchronization process by using a forwarding table timed batch update mechanism, a mechanism of dynamically querying the forwarding table between synchronous data plane nodes by the control plane nodes, and a data plane node flow table and forwarding table failure protection mechanism, thus allowing the service to be normally transferred on the SDN service carrying network. According to the method provided by the invention, a corresponding strategy is generated from the control plane and the forwarding plane simultaneously, and thus the problem of achieving synchronization of the control plane table items, the flow table and the various forwarding table items of the multiple control planes and data planes between domains is well solved.

Description

technical field [0001] The present invention is applicable to the synchronization method of SDN network control level entries, flow tables and various forwarding table items, can ensure the consistency of flow tables and forwarding tables among data forwarding nodes in the same SDN service bearer network, and timely correct data forwarding nodes The local flow table and forwarding table ensure the normal operation of the forwarding plane. Background technique [0002] The generation of the SDN service bearer network requires the configuration and distribution of forwarding table management on the physical nodes of the data plane. There are two main problems in table management: 1) How to implement a high-performance flow table or forwarding table lookup algorithm; 2) How to implement control Synchronization of level entries and multiple forwarding tables. The search algorithm can refer to many existing mature researches, such as traditional prefix search algorithms such as ...

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Problems solved by technology

[0002] The generation of the SDN service bearer network requires the configuration and distribution of forwarding table management on the physical nodes of the data plane. There are two main problems in table management: 1) How to implement a high-performance flow table or forwarding table lookup algorithm; 2) How to implement control Synchronization of level entries and multiple forwarding tables

Considering that with the dynamic addition of new data forwarding nodes, before the flow table and forwarding table are delivered, the inconsistency between the flow table and forwarding table status information of the normal operation data forwarding node and the newly added data forwarding node is completed after the delivery of the global mapping table In the past period of time, the update and synchronization of messages between data forwarding nodes has brought difficulties

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