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 services, data exchange details, digital transmission systems, etc., and can solve problems such as waste of network resources and waste of bandwidth resources.

Active Publication Date: 2011-05-25
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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, whil

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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

The invention provides a multicast message transmitting method, which comprises the following steps that: while receiving a first group of messages sent by a customer edge (CE), a provider edge (PE) used as a multicast source triggers message digest (MD) messages, and the MD messages are broadcast to each opposite end PE in virtual switch interface (VSI) examples; after each opposite end PE analyzes the received MD messages, the mapping of private network multicast addresses and public network multicast addresses is built, in addition, the PE with the same private network multicast addresses triggers and broadcasts internet group management protocol (IGMP) accession request messages of the public network multicast addresses, each equipment builds a public network multicast address transmitting list after receiving the IGMP request messages, and the PE used as the multicast source seals the multicast messages at a public network multicast tunnel end, and the multicast messages carry out the multicast transmission according to the public network multicast address transmitting list. The invention also discloses routing equipment, when the method and the equipment provided by the invention are adopted, the transmission of the multicast messages can be realized in a multicast mode, the network resource waste caused by invalid broadcasting is avoided, and in addition, the bandwidth resource waste caused by the single broadcasting mode is avoided.

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, which is VSI1; 2) broadcast the multicast message in the ...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/18H04L45/16
CPCH04L12/1836H04L45/16H04L12/185H04L12/18
Inventor 宋小恒王超群
Owner NEW H3C TECH CO LTD
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