Link state monitoring method for spanning tree protocol

The invention discloses a link state monitoring method for spanning tree protocol, and belongs to the technical field of Ethernet two-layer switching. According to the link state monitoring method, detection frames are sent to ports at the two ends of a link to monitor the connectivity of the link, and when the ports confirm that the link is not connected, a portEnabled parameter of the ports is reset. The link state monitoring method is compatible with an existing IEEE 802.1 series spanning tree protocol, has the advantages of being simple, practical, flexible in configuration and the like, and is particularly suitable for scenes where relay equipment, firewalls and other equipment exist in a network and one-way communication faults are prone to occurring. 本发明公开了一种面向生成树协议的链路状态监测方法，属于以太网二层交换技术领域。该方法在链路两端的端口互发检测帧以监测链路连通性，当端口认定链路不通时将本端口的portEnabled参数清零。本方法与现有IEEE 802.1系列生成树协议兼容，且具有简洁实用、配置灵活等特点，特别适用于网络中存在中继设备、防火墙等设备、容易出现单向通故障的场景。