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Head node protection method, apparatus and device for point-to-multipoint label switching path

A label-switched path and head-node technology, applied in the field of head-node protection based on point-to-multipoint label-switched paths, can solve problems such as user service interruption and strong head-node protection requirements, achieve a perfect protection mechanism, and promote large-scale deployment. Effect

Inactive Publication Date: 2012-11-07
HUAWEI TECH CO LTD
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Problems solved by technology

However, in actual deployment, especially in the deployment of IPTV, the protection requirements for the head node are getting stronger; because the failure of the head node means the interruption of all user services under the entire P2MP tree

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  • Head node protection method, apparatus and device for point-to-multipoint label switching path
  • Head node protection method, apparatus and device for point-to-multipoint label switching path

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Embodiment Construction

[0029] The present invention will be described in detail below.

[0030] Before introducing the specific scheme, first introduce a few terms:

[0031] Master Head Node (MHN, Master Head Node): For a given P2MP LSP, the MHN is the head node that initially initiates the establishment of this LSP;

[0032] Aggregation node (MP, Merge Point): For a P2MP LSP, those leaf nodes (Leaf Point) or branch nodes (Branch Point) directly connected to MHN in this scheme are called MP nodes, and MP nodes may be one or more ;

[0033] Backup Head Node (BHN, Backup Head Node): For a given P2MP LSP, BHN establishes backup LSPs from itself to all MPs for the given LSP. When the MHN fails, the BHN replaces the MHN as the head node.

[0034] figure 1 Shown is a schematic diagram of a network structure of a protection master head node according to an embodiment of the present invention. The thick solid line in the figure is the established P2MP LSP, and the line to be arrowed is the protection tu...

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Abstract

The invention discloses a head node protection method of a point-to-multipoint label switching path, a device and equipment thereof, which are used for protecting a head node. The method comprises the steps that: a BHN establishes a backup LSP of the BHN and all MP; the backup LSP does not comprise an MHN; the method also comprises the steps that: the MHN transmits data along the LSP established between the MHN and the MP; when a head node switching condition is met, the BHN is switched into a main head node and transmits the data along the backup LSP established between the BHN and the MP. By applying the proposal for protecting the head node provided by the invention, the protection of the head node is realized very well and a protection system of the LSP of a P2MP is greatly improved, thus being capable of improving the scale deployment of the P2MP.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a head node protection method, device and equipment based on Point to Multipoint Label Switching Path (P2MPLSP, Point to Multipoint LSP). Background technique [0002] Multicast technology (Multicast) is a one-to-many multi-party communication method. Different from the commonly used unicast technology, the multicast technology can greatly reduce the consumption of network resources by multi-party communication by establishing an optimal multicast forwarding path and reducing the duplication of data content. Currently the most important pure IP multicast protocol is the Protocol Independent Multicast (PIM, Protocol Independent Multicast) protocol. [0003] Multi-protocol label switching technology (MPLS, Multiple protocol label switch) is a routing technology widely used in IP networks at present, and label distribution generally adopts a Label Distribution Protoc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L29/06
CPCH04L69/40H04L45/28H04L45/00H04L45/16H04L45/22
Inventor 陈国义曹玮
Owner HUAWEI TECH CO LTD
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