Real-time network element topology discovery method for IP (internet protocol) metropolitan area network

Abstract

The invention discloses a real-time network element topology discovery method for an IP (internet protocol) metropolitan area network. The method comprises the steps of topology discovery, topology information verification and real-time update based on a BAS / SR (Broadband Access Server / Service Router) interface, wherein in the topology discovery step, the network element information can be acquired in a Telnet mode, then the network elements designated in a selected BSS (base station subsystem) are traversed, and the topology data are deduced from a leaf node to a root node; in the topology information verification step, the information of a real-time user dialing list is utilized, and the only way property for a user to penetrate through the network logic topology is adopted to verify the correctness of the topology information and provide credible network topology data; in the real-time update step, a multi-user concurrent thread is adopted to gain an MAC (media access control) address of an online user, and the topology data are deduced by taking the MAC address of the online user as a unique address; then the topology update can be carried out on the local network according to the accurate topology of hidden elements discovered in the combination of SLVAN and VLAN (virtual local area network); thus, the obtained topology data can be verified for the second time by the dialing list; and the information accuracy reliability can reach 100%.

Description

technical field [0001] The invention relates to a real-time discovery method for network element topology of an IP metropolitan area network, and belongs to the technical field of metropolitan area network network communication. Background technique [0002] With the rapid increase of operators' MAN users, the Layer 2 switch based on VLAN mode can only accommodate 1024 users in theory. Therefore, SVLAN based on QinQ mode is introduced in the MAN, and the theoretical users of the MAN Increased to 1024×1024. As a result, the number and types of different types of network switches from different equipment manufacturers and different time periods have rapidly expanded, and the current addition of EPON equipment and WLAN wireless APs has made the original relatively simple metropolitan area The network topology becomes more and more complex. The original manual activation maintenance mode makes the data and flag resources configured on the switch less and less, especially the a...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to solve the manual, rough, and untrustworthy maintenance of the network topology information of the existing operator's metropolitan area network, which cannot satisfy the accuracy of the network topology information brought about by the increasingly expanding and updated network switches. It overcomes the low-efficiency mode of traditional generalized priority traversal, adopts the real-time topology discovery and update mode based on BAS / SR layer ports, and provides a real-time topology discovery method for network elements in IP metropolitan area network

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