Method and device for fast switching of dual-network port equipment

Abstract

Embodiments of the present invention provide a method and device for fast switching of dual-network port equipment. The dual-network port device includes an FPGA, and the FPGA is connected to the PHY of the active network port and the standby network port. In the method, the FPGA judges whether to receive the failure alarm information sent by the main network port; when it is determined that the failure alarm information sent by the main network port is received, switch the standby network port to an active state; obtain the main network port cached data, so that the standby network port processes the cached data. Since in the embodiment of the present invention, the FPGA is used to connect the main network port and the backup network port by hardware, when the network port is switched, the cache data of the main network port is saved to the cache of the backup network port to continue processing. Therefore, the loss of the data cached by the main network port is effectively avoided, and therefore, the switching speed of the network port is improved, data packet loss is reduced, and the reliability of data transmission is ensured.

Description

technical field [0001] The invention relates to the technical field of redundant backup of communication links, in particular to a method and device for fast switching of dual network port equipment. Background technique [0002] With the rapid development of network technology, the real-time requirements of the network are getting higher and higher, especially in industrial and military fields such as electric power, rail transit, and ships, which have higher requirements for real-time and reliability of the system. Once the network fails, it will cause huge economic losses or security incidents, and the impact is very serious. However, there are many links involved in the network, such as lines, baseband and telecommunication equipment, etc., which may cause problems. Failure of any link will cause the data transmission of the entire network to stop running. Therefore, it is particularly important to provide users with redundant networks and redundant channels to ensure t...

AI Technical Summary

Problems solved by technology

[0005] However, it takes a certain amount of time for the CPU to detect the fault signal sent by the physical chip during the software switchover process, and it also takes a certain amount of time for the CPU to issue a switchover command to complete the switchover of the backup link. The time for the entire software redundancy protection is generally 10ms- 100ms, and during this time, the network still sends data to the device through the active link, resulting in a large amount of data loss

In order to speed up the switching time and solve the problem of data packet loss during the switching time, hardware switching can also be used to directly connect the main network port and the backup network port of the device through hardware to realize the connection between the main network port and the backup network port. However, when there is unprocessed data in the cache of the main network port, the hardware switch will cause the cache data to be lost

[0006] For the protection of channel redundancy in the prior art, due to the software switching method, there are problems such as long switching time and serious data packet loss, and the hardware switching method cannot process the cached data of the main network port, resulting in the loss of cached data. Problem, therefore, the existing redundant protection methods for dual network port equipment cannot guarantee the accuracy of data transmission, which reduces the reliability of the network

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