Method for realizing multicast translation in three-layer switching unit

Abstract

Characters of the invention are that when receiving message of member relation report in Internet group management protocol (IGMP) sent from connected host, the three layer exchanger checks-up attribute of port, which receives the message. If the said port is not a port on pointed route connected to interface network segment, which belongs to the three layer exchanger, when receiving multicast data stream of multicast group from the port, the three layer exchanger through the port forwards multicast data stream to the said host directly. The invention saves bandwidth consumption effectively so as to raise efficiency for forwarding multicast stream.

Description

technical field

[0001] The invention relates to the technical field of network communication, in particular to a method for realizing multicast forwarding on a three-layer switch. Background technique

[0002] With the rapid development of networks and the increasing popularity of network applications, multimedia services such as streaming media, video conferencing and video-on-demand are becoming an important part of information transmission on the Internet. The unicast mode of point-to-point transmission cannot adapt to the characteristics of this type of business transmission, that is, one-point transmission and multi-point reception, because the server must provide each receiver with a copy of the IP (Internet Protocol) message with the same content, and at the same time, it is repeated on the network. Packets with the same content are transmitted continuously, which takes up a lot of resources. Although IP broadcasting allows a host to send an IP packet to all hosts on...

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