Analysis And Design Of Chinatietong IP Network Topology Discovery System

After ten years of continuous development, Chinatietong company has grown from a single industry-only user services, with industry-specific communication network for the industry-only operator, grow up to be able to provide for the various trades and occupations users many kinds of ordinary or has custom-made the telecommunication services, and has a large telecommunication operators in the fixed network coverage nationwide. In recent years the Internet service can be a company focused on the development direction, which made Chinatietong backbone network has also obtained the rapid development of the Internet. After five consecutive period of rebuilding, Chinatietong backbone Internet egress the total bandwidth of the link with domestic carriers interconnect close to 100Gbps, interconnect with international carriers close to the total bandwidth of the export link 20Gbps, the number of Internet users approaches 10 million. Chinatietong backbone network has grown into a standard carrier backbone IP network.Network topology discovery is access to network devices connected to each other, relationships between network devices and connections between users and on this basis will be for graphical display of network connections. It was originally independent devices, data links, hosts and network protocols together, through an intuitive graphical display to the network administrator, so that administrators can "see" the network; the original has become very abstract things concrete. This network is clear situation on the network administrator, network operation efficiency is improved at the same time also be protected. Strengthen the study of topology discovery technology and applications became a focus of the Chinatietong in network maintenance work.This paper begins by describing the Chinatietong IP network topology discovery system analysis of the background and design direction, clear a level, a system topology discovery is targeted at network-layer topology discovery:is found between the router and the router, the router and subnet connections; Then the network tool which, the network protocol involves to this system in has carried on the introduction. Second, details the different network topology discovery algorithm used when the relevant principles, which the network topology discovery within SNMP-based topology discovery algorithms, focusing on the router-level topology discovery; for use outside the network topology discovery based on BGP topology discovery algorithm, focusing on the autonomous system level topology discovery. System requirement analysis process and the results have been compared in detail. Article from the concrete realization of topology discovery algorithm and system software design illustrates the design of Chinatietong IP network topology discovery system; in addition to the topology discovery process must pay attention to a supplementary explanation of the issues. Finally, this paper sums up the project and put forward the problems of the further solution. Through network administrator tests find Chinatietong IP network topology discovery system for Chinatietong communication of the Internet provides a very good role in support of maintenance management, promote the healthy development of the network.