Joint deployment method of virtual switch and virtual network function in software-defined network

Abstract

The invention discloses a joint deployment method of a virtual switch and a virtual network function in a software-defined network. The flow information in the network is modeled by a controller; the remaining flow entries of the model switch are modeled; the flow bandwidth is processed by a modeling server; The best location to deploy VNF and OVS, and the VNF that the flow needs to pass through, the selection process needs to meet the following constraints, that is, the limit of the switch flow entry and the limit of the server processing flow bandwidth; when the switch node deploys the server, if OVS is deployed on the server, Then install wildcard flow entries for the switch, otherwise install fine-grained flow entries; the ingress switch adds the VNF information that the flow passes to the packet header, and the egress switch removes the added information. The present invention proposes a new joint deployment method, using wildcard flow entries and deploying OVS, can deploy the least number of servers under the condition of satisfying flow entry restrictions, reduce deployment costs, and have broad application prospects.

Description

technical field [0001] The invention belongs to the field of virtual network function deployment, and in particular relates to a method for joint deployment of a virtual switch and a virtual network function in a software-defined network with limited flow tables. Background technique [0002] Software-defined networking (SDN) is a new type of software network architecture. It uses the OpenFlow protocol to separate the network data forwarding plane from the control and management plane. The control work originally undertaken by the switch is handed over to the control layer. It is managed by the controller, which is mainly responsible for topology management, resource statistics, routing calculation, configuration delivery and other functions. The forwarding layer only needs to forward the data. If there is a flow entry matching, it will be forwarded directly, otherwise it will be reported to the controller for decision-making. [0003] Network function virtualization technol...

AI Technical Summary

Problems solved by technology

Due to the high energy consumption and high cost of TCAM, the mainstream SDN switches currently on the market usually only support the storage of thousands of flow entries. For example, the HP 5406zl switch supports 1500 flow entries.

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