Method and device for forwarding Open Flow messages

Abstract

The embodiment of the invention discloses a method and device for forwarding Open Flow messages. When an Open Flow session is established between forwarding equipment and an SDN controller, the SDN controller determines a target server for processing an Open Flow protocol message firstly, and then a forwarding control parameter is issued to gateway equipment; the gateway equipment generates a corresponding flow table according to the forwarding control parameter; when the gateway equipment receives the Open Flow protocol message, the Open Flow protocol message is directly forwarded to the corresponding target server according to the flow table. Through above content, due to the fact that the MAC address, obtained by calculation according to a load balancing algorithm, of the target server is sent to the gateway equipment, the gateway equipment is indicated to directly send the Open Flow protocol message to the target server, and the fact that other servers in the SDN controller transfer the Open Flow protocol message to the target server is of no need. Accordingly, the bandwidth occupied by data transmission between the servers in the SDN controller and CPU resources used for communication between the servers are saved. Meanwhile, the processing efficiency of the Open Flow protocol message is also improved.

Description

technical field [0001] The invention relates to the technical field of communications, in particular to an OpenFlow message forwarding method and device. Background technique [0002] SDN (Software Defined Network, Software Defined Network) is a new type of network innovation architecture, which generally adopts the architecture of separation of control and forwarding, and controls and manages the underlying physical network through a centralized SDN controller (SDN Controller). The Controller and each forwarding Devices communicate through the OpenFlow protocol. SDN-based network architecture such as figure 1 As shown, the SDN controller is located between the application layer and the basic physical network, where the basic physical network includes multiple forwarding devices ( figure 1 1-5 in the above, the OpenFlow protocol is adopted between the SDN controller and the forwarding device. The SDN controller establishes an OpenFlow session with the forwarding device th...

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Problems solved by technology

[0004] It can be seen from the above content that in the prior art, all OpenFlow protocol packets of forwarding devices are transferred through a physical server (or VM) in the SDN controller, which increases the data processing burden of the physical server (or VM)

Moreover, OpenFlow protocol packets need to be transferred between physical servers (or VMs) inside the SDN controller, wasting bandwidth between servers and CPU resources of servers

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