Switch and management method thereof, and controller and management method thereof

Abstract

A controller communicates with a switch. The controller comprises a memory, multiple network applications are stored in the memory and used to process data streams received by the switch, the controller selects a network application needed by the switch, sends the selected network application to the switch and then sends an installation command to the switch, the switch receives and installs the network application, and when the switch receives an external data stream, the switch sends the data stream to the network application for processing. The invention also provides management methods of the controller and the switch. According to the controller, the switch and the management methods of the controller and the switch, a data transmission process between the controller and the switch can be simplified, the efficiency of transmitting the data stream between the controller and the switch is improved, the switch can process part of the data stream independently, and the load of a processor of the controller is alleviated.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a switch, a control device and a management method thereof in a software defined network (Software Defined Network, SDN). Background technique [0002] Software Defined Network (Software Defined Network, SDN) is a new network innovation architecture. Its core technology, Open Flow, separates the control plane of network equipment from the data plane. The SDN controller realizes the collection and routing of network topology. Network layer devices such as switches are only responsible for traffic forwarding and policy execution. The separation of forwarding and control leads to the centralized control logic. The SDN controller has the global static topology of the network, the dynamic forwarding table information of the whole network, the resource utilization rate of the whole network, fault status, etc. After the SDN controller realizes the unified management, integration, and...

AI Technical Summary

Problems solved by technology

The separation of forwarding and control leads to the centralized control logic. The SDN controller has the global static topology of the network, the dynamic forwarding table information of the whole network, the resource utilization rate of the whole network, fault status, etc. After the SDN controller realizes the unified management, integration, and virtualization of network resources, it uses standardized interfaces to provide on-demand network resources and services for upper-layer applications, realizing the opening of network capabilities and providing them on demand. However, such settings have the following problems: First, it causes the data flow to repeatedly transmit information back and forth between the control device and the switch, and between the switch and the switch; second, the out-of-band signal management port of the switch limits the communication speed with the control device

see below figure 2 To describe the second problem in detail, the first switch 20a includes 32 four-channel pluggable ports (Quad Small Form-factor Pluggable, QSFP) 20a1 and an out-of-band signal management port 20a2, each four-channel can be The plug-in port can accommodate a transmission rate of 40Gbps. The first switch 20a communicates with the control device 10 through the out-of-band signal management port 20a2. The transmission rate of the out-of-band signal management port 20a2 is only 1Gbps. The data needs to be transmitted through the out-of-band signal management port 20a2, so the transmission rate of the out-of-band signal management port 20a2 will limit the processing efficiency of the data flow table

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