Traffic statistics method in software-defined network based on wildcard
A software-defined network and traffic statistics technology, applied in the field of network traffic statistics, can solve problems affecting network packet forwarding and routing updates, long switch processing delays, large control link bandwidth, etc., to reduce control link bandwidth and resource usage The effect of low rate and low bandwidth usage
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[0037] like figure 1As shown, a software-defined network traffic statistics method based on wildcards, the method uses wildcards as a unit to calculate the flow information that needs to be collected on each switch on the controller side, and sends corresponding traffic information to each SDN switch according to the calculation results Read-State request, each Read-State request contains a wildcard (wild-card), which can match multiple flows with common characteristics passing through a switch; each switch packs part of the traffic information according to the wildcard field in the request, and Send it to the controller; the controller obtains the network-wide traffic statistics after summarizing, and based on this, it can perform fine-grained packet forwarding, routing update and other tasks to improve the service quality of the network.
[0038] Wildcards specify relatively coarse flow granularity. Each wildcard can match flows with the same characteristics passing through ...
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