Method, system, Openflow switch and server for realizing message forwarding based on SDN

Abstract

Disclosed are an SDN-based packet forwarding method and system, Openflow switches and a server. The method comprises: a source Openflow switch determining, according to port information, that a received data packet is a packet of a user; when a destination identity in the packet hits a mapping flowtable, obtaining a destination location identifier corresponding to the destination identity from the mapping flowtable; when the obtained destination location identifier is a location identifier of the source Openflow switch, sending the packet to a destination user according to port information corresponding to the destination identity; otherwise, encapsulating and sending the packet to a destination Openflow switch corresponding to the destination location identifier, and decapsulating the packet in the destination Openflow switch, so as to send the packet to the destination user according to port information of the destination user.

Description

technical field [0001] The invention relates to the field of software-defined network (SDN), in particular to a method, system, Openflow switch and server for realizing message forwarding based on SDN. Background technique [0002] Software Defined Network (SDN for short) is a new network innovation architecture, which is a revolution for existing network equipment and architecture. The architecture concept of SDN is to separate the forwarding and control of network devices, adopt a centralized SDN controller to control the network through the Openflow protocol, and provide network virtualization functions and application programming interfaces on the SDN controller to facilitate network innovation. figure 1 It is a schematic diagram of the SDN architecture of the prior art, such as figure 1 As shown, the control functions included in the switches and routers in the network are implemented by the SDN controller; the forwarding functions in the switches and routers in the ne...

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Problems solved by technology

In this way, when the location of the host moves, the IP address of the host changes, and the SDN controller needs to recalculate the route. The change of the route will cause the terminal network service to be interrupted. At the same time, the identity of the communication terminal host also changes, which adds to the Increased the difficulty of network supervision for message forwarding based on identity identification

[0004] To sum up, at present, SDN uses IP addresses as the location identifier of the network layer and the identity identifier of the transport layer, which makes the problem of semantic overload of IP addresses increasingly serious.

In addition, when the host moves frequently, the IP address changes frequently, which not only increases the load on the SDN controller, but also affects the network supervision of packet forwarding based on the identity

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