一种改进的以太网物理网络拓扑发现方法

当前物理网络拓扑发现方法存在诸多问题，例如不能发现路由器或者三层交换机路由口物理拓扑乃至整个局域网的物理网络拓扑等。为此，提出一种改进的以太网物理网络拓扑发现方法，该方法利用简单网络管理协议信息进行分析，可以发现路由器、三层交换机、二层交换机、网桥、集线器之间的物理链路。采用基于该方法编制的程序，对一个典型的网络进行拓扑发现，可以得到正确的结果，由此验证该方法的可行性及有效性。

Improved Method of Ethernet Physical Network Topology Discovery

An improved method of Ethernet physical network topology discovery of the network management scope is provided. It only uses the public Simple Network Management Protocol（SNMP） information for analyzing, and solves the main limitation of the popular physical network discovery, that the physical link of the route and the route port of the three layer switch in a network can not be discovery, and the entire network topology can not be discovery. Using this method, the link between route, multi-layer switch, switch, network bridge and hub can be discovered. With the program based on this method, a typical network is under discovered, and the result is correct, which proves the correction of this method.