Virtual network flow classifying method based on OpenFlow protocol

Abstract

The invention discloses a virtual network flow classifying method based on an OpenFlow protocol. When a network virtual platform forwards a data package, a flow tag is added to the data package forwarded from the virtual network edge to the virtual network interior, and the flow tag is popped up from the data package forwarded from a port inside the virtual network to a port at the virtual network edge.

Description

technical field [0001] The invention belongs to the technical field of computer networks, and in particular relates to a method for classifying virtual network traffic of a network virtualization platform based on the OpenFlow protocol. Background technique [0002] With the rapid development of Internet technology, the number of Internet applications and users has increased rapidly, and the Internet based on TCP / IP has gradually exposed many problems and drawbacks. Many countries have proposed next-generation Internet plans, and software-defined networks have emerged as the times require. [0003] The OpenFlow software-defined network consists of two parts: the data plane, used to forward network data packets; the control plane, used to control the forwarding strategy of network data packets. The OpenFlow switch of the data plane maintains a forwarding table inside, which is called a virtual network flow rule description table. The virtual network flow rule description ta...

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Problems solved by technology

In this way, each hop needs to judge the virtual network, which is inefficient.

[0008] 2) The OpenFlow protocol allows the switch to flexibly modify the data packet. When a data packet is operated by a virtual network, some fields of the data packet may be changed. After the data packet enters another OpenFlow switch, it may be virtualized by the network The platform judges it as a data packet of another virtual network, which leads to a data packet being controlled by different OpenFlow controllers corresponding to the virtual network, and the data packet isolation is poor

[0009] 3) Although the network virtualization platform checks and modifies the matching items in the virtual network flow rule description table issued by the OpenFlow controller corresponding to the virtual network, it does not check the mutual exclusion of the flowspace, which leads to The virtual network flow rule description table issued by the corresponding OpenFlow controller may match the data packet corresponding to virtual network 2, resulting in signaling out of bounds

[0010] 4) The network virtualization platform does not define the physical scope of the virtual network, which will cause the virtual network data packets to spread arbitrarily, and the data packets are not closed

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