Hot standby redundancy network system and redundancy realization method

Abstract

The embodiment of the invention discloses a hot standby redundancy network system and a redundancy realization method, which can be suitable for real-time Ethernet. The hot standby redundancy network system comprises at least two network nodes and redundancy nodes which are in one-to-one correspondence with the network nodes, wherein each network node and each redundancy node both comprise four network interfaces and one exchange interface, the four network interface are all provided with the same physical address and logic address, the four network interfaces make up two pairwise redundancy interface in pairs, the network nodes are connected with the corresponding redundancy nodes through the exchange interfaces to make up redundancy node pairs, and the network nodes of the adjacent redundancy node pairs are in cross connection with the redundancy nodes though the network interfaces. With the scheme, the failure rate of the real-time Ethernet is insensitive to the increase of the number of the network nodes, the data message format of the real-time Ethernet does not need to be modified, the failure rate of the real-time Etherent can be obviously reduced, and the redundant degree and the usability of the real-time Etherent can be greatly increased.

Description

Technical field: [0001] The invention relates to the technical field of Ethernet communication, in particular to a hot backup redundant network system applicable to real-time Ethernet and a method for realizing redundancy thereof. Background technique: [0002] Ethernet is the most common communication protocol standard used in today's existing local area networks. With the development of Ethernet technology, the application of Ethernet communication in the industrial field is becoming more and more extensive, and the stable operation and efficiency improvement of industrial production have put forward higher and higher requirements for the availability of real-time Ethernet. High availability is also getting more and more attention. [0003] For the high availability requirement of real-time Ethernet, the interface redundancy mechanism of single-ring network and the node redundancy mechanism of double-ring network are generally adopted at present. However, in a single-rin...

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Problems solved by technology

However, in a single-ring network, only one end of the cable can be faulty. When additional faults occur, the entire network will experience network communication failures.

The double-ring network can allow multiple failures in one ring network, but when two ring networks fail at the same time (such as two link failures in two rings at the same time), it will cause communication failures in the entire redundant network.

Regardless of single-ring redundancy or double-ring redundancy, as the number of system nodes increases, the failure rate of the network will increase sharply. Therefore, in the prior art, the redundancy and reliability of the real-time Ethernet using the above communication mechanism are both Low, it is difficult to better meet the requirements of industrial applications

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