Link Status Detection Technology for Gigabit Redundant Ethernet
WU Xin-we · Jisuanji gongcheng · 2013
To address the issue that the link switch time of gigabit Ethernet redundant Network Interface Card(NIC) is too long and difficult to meet the application requirements,a kind of hardware detection method is proposed.It is a new gigabit redundant Ethernet link status detection method on the basis of heartbeat frame.This method adds the network status detection module used for the organization of heartbeat frame through the improvement of MAC controller,and classifies the Ethernet into two types based on the network latencies:Delay network and No-Delay network.In addition,it can detect the broken link rapidly and shorten the link switch time according to the real-time monitoring to redundant link by heartbeat frame and statistical analyses to heartbeat frame by MAC controller.Test results indicate that this detection method can rapidly detect the disconnected link and the link switch time is in 20 ms,and it can guarantee the reliability and stability of the network communication.