Switching-over method, device and system of multicast distribution tree

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

Active Publication Date: 2011-11-16
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] The present invention provides a method, device and system for switching a multicast distribution tree, which solves the problem of packet loss during the switching process of a multicast distribution tree

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  • Switching-over method, device and system of multicast distribution tree
  • Switching-over method, device and system of multicast distribution tree
  • Switching-over method, device and system of multicast distribution tree

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Embodiment Construction

[0061] The core idea of ​​the technical solution provided by the present invention includes that the source-end edge router encapsulates the switching messages corresponding to at least two multicast streams into a multicast domain message, sends it to the downstream edge router, and establishes a multicast message between the source-end edge router and the downstream edge router. Entries related to Switch-MDT. After receiving the join message from the downstream edge router, the edge router at the source end switches the multicast flow from the shared multicast distribution tree to the switched multicast distribution tree.

[0062] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodimen...

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Abstract

The invention discloses a switching-over method, a device and a system of a multicast distribution tree, which are applied to a multicast virtual private network VIP system which comprises a source-end edge router and a downstream edge router; the method comprises the following steps: when meeting a switching-over condition of the multicast distribution tree, the source-end edge router obtains switching-over group address from a switching-over address pool; switching-over information corresponding to at least two multicast streams is packed into multicast domain information by the source-end edge router according to the switching-over group address, and the multicast domain information is transmitted to the downstream edge router along the shared multicast distribution tree; the source-end edge router leads the multicast streams to be switched-over to the multicast distribution tree from the shared multicast distribution tree after the source-end edge router receives access messages from the downstream edge router. The invention realizes accurate communication of switching-over information and ensures seamless switching of the VIP multicast streams from Share-MDT to Switch-MDT.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to a method, device and system for switching a multicast distribution tree. Background technique [0002] At present, with the wide application of IP multicast, many industries begin to use multicast technology as an application solution. At the same time, multicast VPN (Virtual Private Network, virtual private network), as a technology based on MPLS (Multi-Protocol Label Switching, multi-protocol label switching) L3VPN network to realize multicast transmission, is also more and more popular in enterprise networks. Among them, MPLS L3VPN is a VPN based on BGP (Border Gateway Protocol, Border Gateway Protocol) and MPLS extension technology. It is composed of the backbone network of the operator and each site of the user. Interconnection can only be achieved with the help of the backbone network. VPN can be used as a set of policies to control the connections betwe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/18H04L12/56H04L45/16
Inventor 王伟游君平
Owner NEW H3C TECH CO LTD
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