Method and device for copying multicast message

Abstract

The invention discloses a method and device for copying a multicast message. The method comprises the following steps of: 1, storing the received message in a message buffer memory module, obtaining the buffer memory address of the message, the between-port copying information of the message and the in-port copying information of the message by a between-port copying module, copying the buffer memory address according to the between-port copying information, and transmitting the copied buffer memory address and the corresponding in-port copying information to a port queue module for storing; 2, scheduling the buffer memory address of the port queue module by a port scheduling module, outputting the buffer memory address needing message copying according to the stored corresponding in-port copying information by using the port queue module under the scheduling of the port scheduling module; and 3, reading and outputting the corresponding message by the message buffer memory module according to the buffer memory address output by the port queue module. With the adoption of the technical scheme, the large-data-volume copying of the multicast message is realized.

Description

technical field [0001] The invention relates to the communication field, in particular to a method and device for duplicating multicast messages. Background technique [0002] In the field of data communication, with the rise of Internet Protocol Television (IPTV for short), video conferencing, and Internet radio, more and more manufacturers and services begin to support the application of multicast (multicast) packets. Multicast is a single-point-to-multipoint data transmission method in the network, which can save network bandwidth, reduce network load, and improve network transmission efficiency. [0003] In the existing switching systems of routers and switches, the replication of multicast packets is jointly completed by the uplink side and the downlink side. The uplink side is to realize the replication between different line cards, which is realized by the switching network, and the number of replications is limited; while the downlink side is to realize the replicat...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a multicast message copy method and device to solve the problem in the prior art that a large amount of storage resources will be consumed when multicast copy is performed in a downlink side line card

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