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Multicast message transmitting method and routing equipment

A technology of multicast message and forwarding method, which can be applied in branch offices to provide special service devices, data exchange details, digital transmission systems, etc., and can solve problems such as waste of bandwidth resources and waste of network resources.

Active Publication Date: 2013-09-11
NEW H3C TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] From the above analysis, it can be seen that although multicast packets can be forwarded through both broadcast and unicast methods, the network resources will be wasted when multicast packets are forwarded in broadcast mode, while multicast packets forwarded in unicast mode When processing multicast packets, the packets are forwarded in unicast mode on the public network, and processing multicast packets in unicast mode will cause a waste of bandwidth resources

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  • Multicast message transmitting method and routing equipment
  • Multicast message transmitting method and routing equipment
  • Multicast message transmitting method and routing equipment

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Embodiment Construction

[0059] In order to solve the problems existing in the prior art, the present invention proposes a multicast message forwarding method and a routing device, that is, by triggering an MD message when the PE as the multicast source receives the first message, the The MD message contains the private network multicast group address and the destination IP address of the assigned public network multicast tunnel, and broadcasts the MD message to each peer PE in the VSI instance, and each peer PE sends an MD report After the text is parsed, the mapping between the private network multicast group address and the public network multicast address is established. At the same time, the PE with the same private network multicast group address triggers the IGMP join request message of the public network multicast address, and sends the The IGMP join request message is broadcast until the PE as the multicast source receives it. After each device in the public network receives the IGMP join requ...

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Abstract

A method for multicast packet transmission by a first provider edge device in a virtual switching instance, in which the first provider edge device transmits, to a second provider edge device in the virtual switching instance, a packet having an address of a private network multicast group and an address of a public network multicast group associated with the private network multicast group. The first provider edge device receives, from the second provider edge device, a join request packet to join the public network multicast group. The first provider edge device stores forwarding information for the public network multicast group, wherein the forwarding information relates to an interface over which the join request packet is received by the first provider edge device. The first provider edge device encapsulates a multicast packet for the private network multicast group with the address of the public network multicast group. The first provider edge device transmits the encapsulated multicast packet according to the address of the public network multicast group and forwarding information.

Description

technical field [0001] The invention relates to a message forwarding method in a communication network, in particular to a multicast message forwarding method and routing equipment. Background technique [0002] Virtual private local area network (VPLS) is a transparent local area network (LAN) service provided in a multi-protocol label switching (MPLS) network. Its main purpose is to provide geographically isolated The user sites are connected, and the effect of connecting the two places is the same as in a LAN. [0003] Existing VPLS networks can forward multicast packets in a broadcast manner. Such as figure 1 As shown, instance virtual switching interface (VSI) 1 is created on provider edge router (PE) 1, PE2, PE3, and PE4. PE1 follows the following process after receiving the multicast packet sent by customer edge router (CE) 1. Processing: 1) Determine the VPLS instance to which the multicast message belongs, that is, VSI1; 2) Broadcast the multicast message in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/70H04L12/761H04L12/18H04L45/16
CPCH04L12/18H04L12/1836H04L12/185H04L45/16
Inventor 宋小恒王超群
Owner NEW H3C TECH CO LTD
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