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2017年1月10日,华北通过VANGUARD设备接收的济南雷达信号发生了大规模的延迟现象,情况持续了将近2小时,期间雷达信号传输非常不稳定,延迟频繁波动。经事后调查当日历史数据,发现延迟最大达40多秒。故障发生后,各级领导高度重视,责成设备管理部门对故障原因进行深入分析。作为设备保障部门,在对传输机制进行研究后发现,由于当日中继链路质量不佳,而路由器参数的设置导致不能及时宣告中断并切换链路。本文旨在针对目前使用的VANGUARD路由器中继端口协议—Frame Relay Annex_G协议进行研究,找到VANGUARD路由器判定链路状态的关键参数,并通过测试,提出优化方案,避免同样故障再次出现。
On January 10, 2017, a large-scale delay occurred in Jinan radar signals received by VANGUARD equipment in North China. The situation lasted nearly 2 hours during which radar signal transmission was very unstable with frequent fluctuations in delay. After the investigation of the day after the historical data, found that up to 40 seconds delay. After the fault occurs, the leaders at all levels attach great importance to instructed the equipment management department to conduct an in-depth analysis of the cause of the fault. As the equipment support department, after researching the transmission mechanism, it found that due to the poor quality of the relay link on the day, the setting of the router parameters can not timely announce the interruption and switch the link. This paper aims at the currently used VANGUARD router relay port protocol-Frame Relay Annex_G protocol to study to find the VANGUARD router to determine the key parameters of the link state, and tested to put forward the optimization program to avoid the same failure again.