基于SNMP协议的网络拓扑结构发现程序，以一个路由器作为起点开始搜索，输入路由器的IP 地址后，可以发现与之相连的其他网络设备，并得出其本的拓扑结构图。同时也可以得到路由器的系统信息，路由表及子网结构-Based on SNMP protocol network topology discovery process, to a router as a starting point to start the search, enter the router s IP address can be found which is connected with the other network equipment, and the topological structure of a graph was derived. At the same time, we can get the system information, the routing table and the sub network structure of the router.