拓扑管理是网络管理领域的一个重要问题。准确及时更新的网络拓扑信息是性能评估、事件综合分析、故障定位、资源管理等网管功能的基础。鉴于越来越多的网络设备都支持SNMP协议,提出了基于SNMP的网络层拓扑发现和链路层拓扑发现算法。 Topology management is an important issue in the field of network management. Accurate and timely updated network topology information is the basis of network management functions such as performance evaluation, event comprehensive analysis, fault location and resource management. As more and more network devices support the SNMP protocol, an SNMP-based network layer topology discovery and link layer topology discovery algorithm are proposed.