现提出一种基于轮询的流量监测方法并对其进行改进，缩短包捕获时的数据包行走路径。
A polling based traffic monitoring method is proposed and improved by shortening the journeys of packets when packets capture.
跨度端口可以被配置在这样一种方式，目的港的跨度为入口的数据包将通过监测能见度只有80 RTP流和那里。
The span port can be configured in such a way that the span destination port will have visibility into ingress packets only and there by monitoring 80 RTP streams.
数据包采样方法是提升数据包处理能力很好的方法，在网络流量监测分析中得到了广泛应用。
Packet sampling which was widely used in network monitoring is a good method to upgrade data packet processing capacity.
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