Method and system for realizing rapid convergence in ring network

Abstract

The invention provides a method and a system for realizing rapid convergence in a ring network. The method comprises the following steps that: when a link for connecting two nodes in the ring network is converted from disconnection into connection, a port on the node in connection with the link is up-interrupted; when one of the nodes receives the UP interruption earlier, the two nodes perform hand shaking for three times, and the node which receives the UP interruption earlier transmits a ring detection message to the other node; when receiving the ring detection message, the other node setsself port in a forwarding state; and if receiving the ring detection message, the node which receives the UP interruption earlier sets self to be a main node, sets the port receiving the ring detection message to be a main port, sets the port for transmitting the ring detection message to be a slave port and sets the slave port in a block state. The method for realizing rapid convergence in the ring network of the invention has the advantages of high convergence rate and irrelevance between the convergence time and the node on the ring network so as to improve the transmission efficiency of the network.

Description

technical field [0001] The invention belongs to the technical field of communication, and in particular relates to a method and system for realizing rapid convergence in a ring network. Background technique [0002] With the rapid development of Ethernet technology and its increasingly widespread application in the commercial field, more and more industrial control devices are gradually using Ethernet and TCP / IP protocol as the main communication standard. Although the Ethernet standard used in the field of industrial control is the same as that of commercial Ethernet, in the field of industrial control, it is also required that the network can work stably in a relatively harsh working environment. Therefore, network products used to connect industrial equipment need to be specially designed to provide industrial-grade reliability to meet the needs of long-term continuous operation. In addition, in the field of industrial control, the distribution of devices to be connected...

AI Technical Summary

Problems solved by technology

[0009] The first defect: Since there is only one spanning tree in the entire switching network, it will lead to a long convergence time when the network scale is relatively large, and the impact of topology changes is also large

[0010] The second defect: In the case of a symmetrical network structure, a single spanning tree is not a problem

However, when the network structure is asymmetric, the single spanning tree will affect the connectivity of the network.

[0011] The third defect: when the link is blocked, it will not carry any traffic, resulting in a great waste of bandwidth, which is more obvious in the case of ring metropolitan area network

[0012] In the Ethernet layer 2 network, the STP protocol is generally used for network reliability. The STP protocol is a standard ring network protection protocol developed by IEEE and has been widely used. However, the actual application is limited by the size of the network. Convergence time is affected by network topology

The general convergence time of STP is at the second level, and the convergence time is longer when the network diameter is larger. Although RSTP / MSTP can reduce the convergence time, it still cannot meet the requirements for services with high quality of service requirements such as 3G / NGN voice.

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