System Research And Implementation, Based On The Topology Of The Ospf And Bgp Protocols Found

The article puts forward a real time topology discover technique based on OSPF protocol and BGP protocol to solve the difficulties in multi AS topology discovering. The system gathers the BGP message which transfer within AS, and the OSPF message which transfer in AS. Through analyzing these messages, system can describe the state and change of multi AS topology rapidly, accurately and efficiently. The article detailed discusses message gathering, message analyzing, topology graphics saving.Basic concept about topology discovery has been introduced in this article. The article also introduces the purpose of topology and main topology analyzing technology. The article compares main topology analyzing technology and given out a summary. Especially compare the topology discovering method which based on the OSPF and BGP with the method which based on SNMP and ICMP. It also introduces topological advantage which is based on the OSPF and BGP protocol. In it base, a topology discovery system is discussed. The article analyzes the messege gather technology and OSPF, BGP message ananysed technology which is already have. After it, introduces the background technology used by topology discovering system. And main content of this article is bringed out definitely: large net real time monitor.After defines the objective, this article introdces the system design method in schematic and detail. With regard to the message gather technology, at present already relatively mature. So it's not the main body of this article. The main body of this article is message analyzing technology, topology drawing method and topology manipulation. In the message analyzing part, article introduces the OSPF message analyzing arithmetic ang BGP message analyzing arithmetic detailedly. In the topology drawing and topology manipulation part, article introduces the topology drawing, topology saving, topology sercning, topology re-draw and topology comparation technology. This system already been tested in real net, so the article gives out the experiment result and the summary.