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A method for realizing redundant backup between loop networks

A technology of redundant backup and implementation method, applied in data exchange network, digital transmission system, electrical components, etc., can solve problems such as inability to meet industrial field communication, and achieve the effect of fast switching

Active Publication Date: 2011-08-10
KYLAND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Industrial field communication adopts the mode of redundant ring network communication. If the communication between two redundant ring networks can only adopt the mode of single-link communication, or use RSTP to realize dual-link, but the redundancy time is more than 30ms, which cannot meet the requirements. Industrial Field Communication Requirements

Method used

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  • A method for realizing redundant backup between loop networks
  • A method for realizing redundant backup between loop networks
  • A method for realizing redundant backup between loop networks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] 1. The competition is the status change of the devices on ports 1 and 2 of the backup ring

[0047] The state machine changes of ports 1 and 2 of the backup ring are as follows: Image 6

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[0050]

[0051]

[0052] 2. Status changes of devices connected to backup ring ports 1 and 2 (neighbors)

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[0054]

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Abstract

The invention relates to an implementing method for redundant backup between ring networks and is called DT-ring+ for short. A network topology of the method is as shown in Figure 1. The implementing method is firstly characterized in that a function of mutual backup of two ring networks through two link circuits is provided and the time of redundancy switching is less than 30ms; secondly a DT-ring+ protocol is initialed between a Ring 1 and a Ring 2 when the topology structure as shown in the Figure 1 is formed, and is only initialed in Switches B and C, the Switch B is provided with a DT-ring+ ring port 1 (which is in a Forwarding status) and the Switch C is provided with a DT-ring+ ring port 2 (which is in a Blocking status); no DT-ring+ protocol is initialed in Switch E and Switch G. The operation in the network can be quickly switched when the network is broken at any point, and even when a connection failure of two points occurs in any DT-Ring, thereby improving the reliability of the industrial site network.

Description

technical field [0001] The invention relates to the technical field of dual-link fast switching between redundant rings of industrial Ethernet, in particular to fast redundant switching between redundant rings, which provides redundant double backup links for communication between rings. Background technique [0002] Industrial field communication adopts the mode of redundant ring network communication. If the communication between two redundant ring networks can only adopt the mode of single-link communication, or use RSTP to realize dual-link, but the redundancy time is more than 30ms, which cannot meet the requirements. The needs of industrial field communication. The development of redundant link communication mode between rings not only solves the on-site demand for industrial data dual homing, but also improves the reliability of industrial ready-made data. [0003] The DT-ring+ inter-ring redundancy technology is improved on the basis of the mature fast redundancy te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/437
Inventor 张国刚陈凡民马化一薛百华
Owner KYLAND TECH CO LTD