A communication method, switch, controller and communication system

Abstract

The invention relates to a communication method. In the method, after interconnecting hosts of the same network segment and different network segments through an OpenFlow switch and an SDN controller, the OpenFlow switch receives the destination IP address sent by the first host as the IP address of the virtual gateway, After the first PING request message whose destination MAC address is the MAC address of the virtual gateway, the PING request message is sent to the SDN controller, and then the PING reply message issued by the SDN controller is sent to The first host is configured to establish a communication link between the virtual gateway and the first host. In this way, after one configuration, the OpenFlow switch and the SDN controller can be used as the common default gateway of the switches of several network segments to realize the interconnection and communication between the gateways, and further realize the communication between hosts in different network segments. communication.

Description

technical field [0001] The invention relates to the field of communication, in particular to a communication method, a switch, a controller and a communication system for realizing the communication method. Background technique [0002] Gateway (Gateway) is also called Internet connector and protocol converter. A gateway is a network interconnection device that realizes network interconnection above the network layer. The gateway can be used for both WAN interconnection and LAN interconnection. A gateway is a computer system or device that acts as a switch between two systems that use the same or different communication protocols, data formats or languages, or even completely different architectures. The default gateway refers to a default egress gateway of an Internet Protocol (Internet Protocol, IP) subnet in the local area network. If any host in this subnet wants to communicate with hosts in other IP network segments, it will send the data packet to the default gatewa...

AI Technical Summary

Problems solved by technology

In addition, every time an IP subnet is added to the campus network, corresponding static routes and physical ports must be added in advance on the router, and VLANs or Ethernet switch devices must be added, which increases the complexity and cost of network deployment.

The existing technical solution has the problems that when the network topology changes, the deployment and migration of the network are very inflexible, the configuration is cumbersome, the maintenance is difficult, and the scalability is low.

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