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Control method for exact multicast forwarding

A control method and multicast forwarding table technology, which is applied in the control field of broadband Ethernet multicast precise forwarding, can solve problems such as increasing network load, wasting network bandwidth, and RPF of routers and switches cannot be ordered, so as to reduce network load and save The effect of network bandwidth and efficient data transfer

Inactive Publication Date: 2004-03-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Multicast data can only be broadcast in VLAN, which wastes network bandwidth and increases network load
[0007] When the source port and the egress port of the multicast are in the same VLAN, the source port and the egress port belong to the same layer-3 interface, and the traditional router and switch RPF (reverse path lookup) check cannot pass the request at all.

Method used

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  • Control method for exact multicast forwarding
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Examples

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Embodiment Construction

[0025] According to the technical scheme of the present invention, an embodiment of the present invention is provided below, figure 1 A flow chart of the method of the invention is shown. Specific steps are as follows:

[0026] 1. Configure the media server server and start the multicast service.

[0027] 2. Enable the multicast function on the switch and configure the corresponding interface.

[0028] 3. The orderer starts to order and sends an IGMP join message.

[0029] 4. The interface management module obtains the port number, VLAN ID, and slot number of the broadcaster, and notifies the multicast routing module.

[0030] 5. The multicast module establishes a multicast route between the multicast source and the orderer. The source port and the destination port are in the same VLAN, and a Layer 2 multicast forwarding table is established; the source port and the destination port are in different VLANs, and a Layer 3 multicast is established. forwarding table, and set t...

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Abstract

The invention provides a control method for IP group broadcast precise relay, the steps include: 1. the group broadcast model sets up route between the source and the orderer, and sets up the relay table; 2. when group broadcast comes, it examines if the IP package legal or not, if legal then carries on following step; 3. searches three-layer table according to the source address and group broadcast address, if acquires the relay index then enters next step; 4. judges if the sign in three-layer valid or not, if yes, enters next step; 5. searches group broadcast relay table, examines if the source port matches with VLAN, if yes, next step; 6. searches group broadcast relay table, if source port and target port are in the same VLAN, carries on two-layer relay; if not, carries on the three-layer relay.

Description

Technical field: [0001] The invention relates to a method for controlling precise multicast forwarding of a communication network, in particular to the control method for precise forwarding of broadband Ethernet multicast, and belongs to the field of broadband network communication. Background technique: [0002] There are two ways of traditional IP communication, the first is unicast, and the second is broadcast. If the information is to be sent to multiple hosts in the network but not all hosts, either the broadcast method is used, or the source host sends IP packets to multiple target hosts in the network in unicast mode. When broadcasting is implemented, it will not only send information to unnecessary hosts, but also waste bandwidth, and may cause serious broadcast storms due to routing loops. When implemented in unicast mode, a large amount of bandwidth will be wasted due to repeated sending of IP packets, and the load on the server will also be increased. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/16H04L12/24H04L12/28H04L29/02H04Q3/00H04Q3/545
Inventor 袁智勇
Owner HUAWEI TECH CO LTD
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