Method for realizing multicast translation in three-layer switching unit

A switch and multicast technology, applied in the field of network communication, can solve problems such as network bandwidth waste, achieve the effect of improving forwarding efficiency and saving network bandwidth consumption

Active Publication Date: 2006-05-24
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0011] The purpose of the present invention is to provide a method for realizing multicast forwarding on a three-layer switch, so as to overcome the disadvantage that the network bandwidth is wasted when the three-layer switch forwards the multicast flow in the prior art, effectively save bandwidth consumption, and improve Multicast stream forwarding efficiency

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  • Method for realizing multicast translation in three-layer switching unit
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  • Method for realizing multicast translation in three-layer switching unit

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Embodiment Construction

[0046] The core of the invention is to determine the forwarding mode of the multicast data flow of the multicast group under the port by checking the port attribute of the received message when the three-layer switch receives the IGMP membership report. If the port is not connected to the DR (Designated Router) port on the network segment of the interface to which it belongs, when the layer 3 switch receives the multicast data flow of the multicast group under the port, it will directly forward the multicast data flow to the host through this port ; Otherwise, it can be forwarded according to the existing forwarding mode. During specific implementation, an interface attribute field can be added in the multicast group table saved by the layer-3 switch, and this field can be used to indicate that the interface network segment where the layer-3 switch receives the IGMP membership report report message is not the DR, and the IGMP membership The report is not coming from the port c...

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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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L45/16
Inventor 吕琳周迪
Owner NEW H3C TECH CO LTD
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