QNX-based dual-Ethernet redundancy implementation method

Abstract

According to the QNX-based dual-Ethernet redundancy implementation method provided by the invention, QNX network equipment is adopted, the network equipment comprises a first Ethernet network adapterand a second Ethernet network adapter, and the method is implemented on the basis of a network drive of a data link layer and comprises the following steps: S1, initializing and configuring network parameters; S2, periodically detecting a fault state of the first Ethernet network adapter and recording a working state of the second Ethernet network adapter, and determining a communication Ethernetadapter according to the fault state and the working state; S3, by the communication Ethernet network adapter, sending or receiving a network data packet; and S4, by the communication Ethernet networkadapter, sending or receiving a multicast data packet. According to the invention, based on the network drive of the data link layer, the switching of dual Ethernet based on QNX is realized by modifying the network drive, the switching time is short, the cost is low, hardware and application programs do not need to be modified, the coupling degree is low, the stability and the safety are high, and the switching of multicast functions is realized.

Description

technical field [0001] The invention relates to the technical field of real-time operating systems, in particular to a method for realizing dual Ethernet redundancy based on QNX. Background technique [0002] With the gradual maturity of real-time Ethernet technology, the application requirements of real-time Ethernet on trains are increasing day by day. In order to meet the high reliability requirements of real-time Ethernet, many devices will require dual redundant Ethernet. A network device must have two Ethernet network cards, and the two Ethernet network cards must use the same IP address. At the same time, only one Ethernet network card is working, and the other Ethernet network card is in a hot backup state. When it is detected that the communication link where the working Ethernet network card is located is faulty, the other Ethernet network card in hot backup will be automatically put into operation. However, the two Ethernet network cards supported by the existin...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of high cost, long switching time and high coupling degree of QNX-based dual Ethernet redundancy in the prior art, the present invention provides a method for realizing QNX-based dual Ethernet redundancy, based on data link The network driver at the road layer realizes QNX-based dual Ethernet switching by modifying the network driver. The switching time is short, the cost is low, and there is no need to modify hardware and application programs. The degree of coupling is low, and the stability and security are high.

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