Snmp-based Ip Network Topology Discovery And Application Of Information

In large and constantly evolving networks, it is difficult to determine how the network is actually laid out. Yet Knowledge of the up-to-date topology of an IP network is crucial to a number of critical network management tasks.Based on the analysis of the existing automatic topology discovery techniques, this paper presents a new topology discovery algorithm for heterogeneous IP networks using standard SNMP MIBs. Our algorithm makes use of the topology configuration information in routers, switches and hosts under the situation that do not generate traffic in the network in advance, to determine the interconnection between directly connected peers in a network, to produce the IP-level and link-level topology map. We have tested our approach in our internal network and we verified the result, it has accurately determined the topology of several different networks using a variety of hardware and network configurations.We present the design of network management prototype. We have implemented the proposed topology discovery algorithm based on the Visual C++ and WinSNMP API. Detailed implementation techniques are given for decreasing the number of SNMP request packets and the cost of topology discovery.