Open flow switch, packet switching method, sdn controller and data flow control method

Abstract

The invention relates to an open flow switch and a packet switching method thereof, as well as an SDN controller and a data flow control method thereof. An open-flow switch includes a network unit, a storage unit, and a processing unit. The network unit is connected to a network, where the network includes a plurality of Ethernet switches. The storage unit is coupled to the network unit and stores a flow table, wherein the flow table includes a plurality of action rules, and each action rule includes a condition and an action respectively. The processing unit receives the packet, analyzes the packet and judges whether the packet meets the conditions of the action rule. When the processing unit judges that the packet satisfies the condition of the first action rule in the action rule, the processing unit executes the action of the action rule, wherein the action of the action rule includes: replacing the destination MAC address of the packet with the flow address, and sending the packet to the network.

Description

technical field [0001] The present invention relates to an OpenFlow switch and its packet switching method, and a Software-Defined Network (Software-Defined Network, SDN) controller and its data flow control method. Background technique [0002] Due to the heavy use of the network, the routing technology in the network has become the key to how to optimize the network capacity. In the existing network architecture, such as the Ethernet network architecture, when each network device in the network, such as a router (router) or a switch (switch) receives a data packet, it will determine the data packet by itself. What's next for the package. In other words, the data path of a packet is not determined when the packet is transmitted. Since the above-mentioned network devices can only connect with their neighboring network devices, from the perspective of the overall network, each network device's own decision may not be a good decision, and may also be an inefficient decision....

AI Technical Summary

Problems solved by technology

[0004] However, in order to convert an existing network into an OpenFlow network, a network device (for example, an OpenFlow switch) in the OpenFlow network must have the function of interpreting the rules and network information transmitted from the SDN controller, and such a function is Network devices (such as Ethernet switches) in the existing network are not compatible

Moreover, it takes a lot of time and money to convert all network devices in the entire existing network into network devices compatible with the Openflow network structure

Images