Cloud computing and the Big Data Era Network Technology Secrets (12) Customizing Network SDN

Software-defined Network--SDN

SDN is a hotspot of network technology, that is, software defined network, OpenFlow is a framework standard to realize SDN idea,Open refers to the open, open, specific rules for the control plane from the individual communication manufacturers to become public technical standards,Flow is a stream that classifies all data traffic as defined by the stream, and each stream is accurately described by a six-tuple, aThe goal of the technology is to build the next generation network communication model, which is the transformation of the infrastructure mode. The essence is open thinking mode, that is, the complex network management control strategy is defined by software, so that it has open,flexibility, but also can change the current operation and maintenance costs more and more high situation.

Figure SDN Architecture Architecture

Description

Simplified distributed Switches

Control plane policy centrally manage security, routing, etc.

Using OpenFlow protocol for policy issuance

Application layer operation management via API of control plane

Structure of Figure OpenFlow

Description

The most important inside the openflow switch is the flowtable table

FT meter is issued by the upper controller

OpenFlow hosted on the SSL protocol

Cloud computing and the Big Data Era Network Technology Secrets (12) Customizing Network SDN