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Dual-home network topology structure

A technology of network topology and master node, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc. It can solve the problems of large redundancy at the edge of the industrial network, inability to quickly determine the master node, restore the network, etc., and achieve high reliability , high flexibility, and low redundancy complexity

Inactive Publication Date: 2019-02-12
智强通达科技(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the edge redundancy of the industrial network in the prior art is large, and the technical problem that the master node cannot be quickly determined and the network is restored

Method used

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Experimental program
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Embodiment 1

[0040] This embodiment provides a dual-homing network topology, the dual-homing network topology includes two independent connection nodes, each with a port at both ends of the connection node, one of the connection nodes is the master node, and the other connection node is the backup node;

[0041] If the port of the master node loses the link signal, the data is switched to the backup node;

[0042] The node weight vector information of the master node is better than the node weight vector information of the backup node.

[0043] Specifically, the initial state of the two independent connection nodes is a standby node, and the master node is determined by comparing the self-node weight vector information carried by the two ports, and the optimal connection node is defined as the master node; the node weight vector information Including node link cost value and node identification information.

[0044] Among them, the port status of the master node is FORWARD, which does no...

Embodiment 2

[0057] figure 2 A schematic structural diagram of a dual-homing network topology in a dual-ring application provided in this embodiment, the specific process is as follows:

[0058] Assume that node A in device E is connected to device A1 in ring 1, and node B is connected to device B2 in ring 2 to form a dual-homing network topology. If the link cost of node B in device E is higher than that of node A, and the weight vector of node A is better than the weight vector of node B, then node A is the master node, and the corresponding port status is FORWARD. B is the standby node, and the corresponding port status is BLOCK.

[0059] When the link of node A fails, node B will switch to the master node, and the corresponding port status will be set to FORWARD, node A will become the standby node, and the corresponding port status will be set to BLOCK, and the operation of clearing the MAC table will be performed at the same time.

[0060] When the link of node A returns to normal...

Embodiment 3

[0063] image 3 A schematic structural diagram of a dual-homing network topology in MESH structure application provided for this embodiment, the specific process is as follows:

[0064] Assume that node A in device E is connected to device A in the MESH structure, and node B is connected to device B in the MESH structure, forming a dual-homing network topology. If the link cost of node B in device E is higher than that of node A, and the weight vector of node A is better than the weight vector of node B, then node A is the master node, and the corresponding port status is FORWARD. B is the standby node, and the corresponding port status is BLOCK.

[0065] When the link of node A fails, node B will switch to the master node, and the corresponding port status will be set to FORWARD, node A will become the standby node, and the corresponding port status will be set to BLOCK, and the operation of clearing the MAC table will be performed at the same time.

[0066] When the link o...

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Abstract

The invention relates to a dual-home network topology structure. The technical problem that an industrial network is high in edge redundancy, a master node cannot be determined rapidly, and the network cannot be recovered rapidly is solved. According to the technical scheme, a dual-home network topology structure comprises two independent connection nodes. One of the connection nodes is the masternode and the other one is a standby node. If a link signal is lost at a port of the master node, data is switched to the standby node. Node weight vector information of the master node is superior tothat of the standby node. The problem is solved well. The structure can be applied to the technology of the industrial Ethernet.

Description

technical field [0001] The invention relates to the technical field of industrial Ethernet, in particular to a dual-homing network topology. Background technique [0002] Designing and implementing high availability Ethernet network topologies in industrial networks is challenging. Serial fieldbuses traditionally used for industrial control do not offer fault-tolerant options, and industrial system designers are not accustomed to planning for redundancy in control equipment. The options for implementing redundant devices at the network edge are too limited, expensive and complex to be considered in most industrial systems. [0003] While ring and mesh network topologies are commonly used, finding practical ways to provide edge device and node failure recovery remains difficult. The software required to manage computers and other devices equipped with dual NICs to set up redundant connections on the network remains complex, and dual NIC solutions are costly. Few manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/707H04L12/751H04L12/24H04L45/24H04L45/02
CPCH04L41/0668H04L41/12H04L45/02H04L45/22
Inventor 邓耀勇
Owner 智强通达科技(北京)有限公司
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