A rapid switching method and device for redundant double network cards

Abstract

The invention relates to a rapid switching method and device for redundant double network cards, and belongs to the technical field of networks. The method comprises the following steps that: networkterminal equipment inquires the physical state of double network cards after initializing the redundant double network cards, activates a first network card with high priority, and simultaneously, thenetwork terminal equipment and a switch respectively start a GRRP protocol; judging whether to use attribute information interaction of a GRRP protocol between the network terminal equipment and theswitch to detect a communication link state or not according to a query result of the physical state of the double network cards, and judging whether the activated first network card works normally ornot according to a detection result; if it is judged that the activated first network card works abnormally, switching to a second network card, and updating the binding relationship between the MACaddress and the IP address; otherwise, not switching the network cards, and continuously inquiring the physical states of the double network cards. According to the invention, the defects of redundantdouble network card switching in aspects of fault detection completeness, real-time performance, accuracy and universality in the prior art are overcome.

Description

technical field [0001] The invention relates to the field of network technology, in particular to a method and device for fast switching of redundant dual network cards. Background technique [0002] As a relatively simple and mature technology, Ethernet LAN technology occupies a dominant position in the fields of enterprise private network and data center. However, in the Ethernet LAN system, there are many reasons that may cause the end-to-end data transmission channel to be interrupted, such as switch failure, cable interruption, equipment hardware failure, etc., resulting in a decrease in the reliability of the LAN. 1. On occasions where fault recovery is relatively strong in real time, in order to ensure system reliability, redundant backup of equipment, links and interfaces, fault recovery, and hot switching are generally used. Among them, for data terminal equipment communication interface or link failure, the industry widely uses a dual-network card redundant hot-sw...

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a method and device for fast switching of redundant dual network cards to solve the problem of simple fault detection coverage in the above-mentioned traditional methods and bringing large communication overhead to upper-layer application protocols and not being universal question

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