Method, device and system for establishing switching multicast distribution tree

A multicast distribution tree and switching group technology, applied in the field of communication

Active Publication Date: 2011-07-27
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, there will inevitably be a small amount of packet loss during the switchover from Share-MDT to Switch-MDT

Method used

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  • Method, device and system for establishing switching multicast distribution tree
  • Method, device and system for establishing switching multicast distribution tree
  • Method, device and system for establishing switching multicast distribution tree

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Embodiment Construction

[0038] One embodiment of the present invention provides a kind of method for setting up switching multicast distribution tree (being public network forwarding tunnel) in multicast virtual private network, comprising:

[0039] When the multicast distribution tree switching condition is met, the edge routing device PE of the backbone network at the source end sends a switching message containing the switching group address to the downstream backbone network edge routing device PE along the shared multicast distribution tree. The text is used to establish the handover multicast distribution tree;

[0040] Before the multicast flow on the shared multicast distribution tree starts switching, a registration message is sent to the routing device RP at the public network convergence point, triggering the public network RP, the source PE, and the receiving PE to establish a switch multicast distribution tree. The registration message carries the public network multicast data packet enc...

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Abstract

The embodiment of the invention discloses a method for establishing a switching multicast distribution tree (a public network forwarding tunnel) in a multicast virtual private network (VPN). In the method, a provider edge (PE) at a source end sends a switching message containing a switching group address to a downlink PE along a share-multicast distribution tree (share-MDT), wherein the switching message is used for establishing the switching multicast distribution tree; and a register message is sent to a rendezvous point (RP) in a public network before multicast streaming on the share-MDT starts to switch so as to trigger the RP in the public network and the PE at the source end to establish the switching multicast distribution tree with a PE at a receiving end. The embodiment of the invention also provides a corresponding device and system. By using the method, the switching multicast distribution tree can be established before the multicast streaming is switched to the switching multicast distribution tree from the share-MDT, thus the problem of packet loss of the multicast steaming can be avoided in the process of switching the multicast streaming to the switching multicast distribution tree from the share-MDT.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method, device and system for establishing a switching multicast distribution tree in a multicast virtual private network. Background technique [0002] With the development of network technology, the entire network system has become larger and larger, and a large number of subnet systems have also been produced. In order to realize data isolation between subnet systems and data intercommunication between subnet nodes in the same subnet system but in different geographical locations, virtual private network (Virtual Private Network, VPN) technology has begun to be widely used. VPN uses tunnel technology to establish a dedicated data transmission channel in the backbone network to realize the transparent transmission of private network (subnet) protocol messages and data messages on the public network. [0003] With the wide application of VPN technology, users have incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/18H04L12/56H04L12/46H04L45/16
Inventor 范树学陈行刘毅松于云福
Owner HUAWEI TEHCHNOLOGIES CO LTD
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