Method for implementing multicast data stream retransmission in virtual special LAN service

A virtual dedicated, local area network technology, applied in the field of multicast data stream forwarding, can solve the problems of increased pressure on multicast replication, waste of network bandwidth resources, etc., to achieve the effect of reducing pressure and saving bandwidth

Inactive Publication Date: 2006-11-15
HUAWEI TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

This extensive multicast stream forwarding method increases the pressure of multicast replication between the PE device in the VPLS network and the virtual link (VC pseudowire) in the VSI; and also wastes network bandwidth resources during the transmission process.

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  • Method for implementing multicast data stream retransmission in virtual special LAN service
  • Method for implementing multicast data stream retransmission in virtual special LAN service
  • Method for implementing multicast data stream retransmission in virtual special LAN service

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Embodiment Construction

[0050] The present invention provides a method for forwarding multicast data streams in a virtual private local area network, the core of which is: first, the VSI of the VPLS network monitors the PIM protocol messages received by all ports in it, and according to the information in the messages Configuring layer 2 multicast routing information; and then implementing data flow forwarding according to the configured routing information.

[0051] In the embodiment provided by the present invention, by realizing PIM-SNOOPING in VPLS, accurate forwarding of multicast packets in VPLS is achieved, and bandwidth resource of MPLS / IP network is saved. The specific implementation process is as figure 2 shown, including:

[0052] Step 100, the VSI of the VPLS network monitors the PIM protocol messages received by all the ports in the VSI, and configures layer-2 multicast routing information according to the information in the messages. The specific implementation process is as image ...

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Abstract

The invention relates to a method for implementing multicast data flow retransmission in VPLAN, and its kernel: firstly, virtual switching instance (VSI) in VPLS in VPLAN monitors unicast routing protocol irrelated multicast protocol PIM message received by its inner port and configures two layers of multicast routing information according to the message; then according to the configured routing information, it implements retransmission of multicast data flow. And the invention can implement PIM Snooping function in VSI in VPLS, thus able to implement accurate multicast packet retransmission in VSI and effectively saving MPLS / IP network bandwidth and able to reduce the pressure that PE in VPLS makes multicast copying in virtual links in VSI.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for realizing multicast data flow forwarding in a virtual private local area network service. Background technique [0002] VPLS (Virtual Private LAN Service; Virtual Private LAN Service) is a point-to-multipoint L2VPN (L2 Virtual Private Networks; Layer 2 virtual private network) technology provided on MPLS (Multi-Protocol Label Switch; Multi-Protocol Label Switching) / IP network , also known as Transparent LAN Service (TLS). More and more operators adopt VPLS technology to provide VPN services for enterprise users. VPLS can be regarded as a group of Virtual Switching Instances (VSI). VSIs are connected through EoMPLS (Ethernet over MPLS; a technology of Ethernet over MPLS) virtual circuits to form a logical Ethernet switch. [0003] The working principle of the VPLS VSI is similar to that of an Ethernet switch, such as learning MAC addresses, forwarding Ethernet frames based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L29/06
CPCH04L12/1886H04L45/00H04L45/16H04L45/502
Inventor 徐小虎
Owner HUAWEI TECH CO LTD
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