SDN在广电网中的应用与优化

The application and optimization of SDN in broadcasting network

在信息技术日渐成熟的今天,业务带宽成为提高用户体验的首要因素,不断改进升级,促进广电网络信息化、智能化并保证网络安全、稳定成为广电运营商必不可少的一项工作。将SDN(Software Defined Network)网络架构运用于广电网,可以减少对原有网络服务器的压力,更加方便网络管理人员对网络进行管理。针对现有广电网络模型,提出了将SDN设备接入在网络边缘,再将所有边缘业务逐渐迁移到SDN业务体系中,待业务完善后将SDN部署到核心业务中,并对改进模型进行了实际应用的模拟实验。实验结果表明,SDN通过不断地更新软件策略,对DDoS的威胁采取屏蔽、丢弃数据包等方式,及时发现威胁,定期清洗流量等实现了软件定义安全。

Today,with the progress of information technology,many new mobile internet applications appear.Service bandwidth has become the most important factor to improve user experience.Continuous improving the network quality based on existing equipment,and making the broadcasting network intelligent,safe and stable has become an essential task for these service provider.Applying SDN（ Software Defined Network） network architecture to the broadcasting network can reduce the pressure of the original broadcasting networks＇ server,and give network administrators more tools to control the whole network.We make a network model based on the existing broadcasting network,put the SDN access equipment at the edge of the network,and then gradually migrate the whole network to the SDN business system.Experimental results show that SDN implements the software defined security by dynamically using different software strategy,detecting threats in time and shielding and discarding the packets from threat like the DDo S attack.