Multicast message filtering method and device, and multicast message receiving equipment

Abstract

The invention discloses a multicast message filtering method and device, and multicast message receiving equipment. The method comprises the following steps: receiving a current multicast message; extracting numerical codes of corresponding segments step by step in a current multicast address of the current multicast message; and determining a corresponding first filter parameter in preset corresponding level of filter parameters according to the extracted numerical codes, and filtering the current multicast message step by step according to the determined first filter parameter. According tothe multicast message filtering method provided by the invention, the current multicast message is filtered according to preset each level of filter parameters, so that the receiving and delivery of the multicast message can be performed in strict accordance with a subscribe multicast message, and non-subscribe messages are completely shielded, so that the filtering accuracy of the multicast messages is effectively improved, and finally the problems that the filtering accuracy of the traditional multicast filtering algorithm is low and certain risks are easily brought to the operation of the device are solved.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a multicast message filtering method, device and multicast message receiving equipment. Background technique [0002] With the development of smart substations and the increasing application of Ethernet technology in the industrial field, network data communication has gradually become the main way of industrial data interaction. Wherein, since the multicast filtering algorithm of the traditional MAC hardware usually adopts the operation method of uniformly comparing and judging the destination MAC in the message, when the number of received multicast messages increases, its multicast filtering ability gradually decreases, which is very It is easy to cause some unnecessary packets to be received. For receiving devices of multicast messages (such as GOOSE messages or SMV messages) in substations, it is often necessary to receive messages with many different multicas...

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a multicast message filtering method, device and multicast message receiving equipment for the problem that the traditional multicast filtering algorithm has low filtering accuracy and easily brings certain risks to the operation of the device

Images