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Realizing method for pseudo wire from point to multiple points

An implementation method and a pseudowire technology, applied in the field of communication, can solve problems such as the inability to realize the establishment and maintenance of P2MPPW

Inactive Publication Date: 2009-10-28
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The "draft-yasukawa-mpls-ldp-mcast-over-p2mp-lsps-01" draft only proposes a solution for P2MP TE LSP carrying P2MP LDP LSP in the MPLS field, and cannot realize the establishment and maintenance of P2MP PW in the PWE3 field

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  • Realizing method for pseudo wire from point to multiple points
  • Realizing method for pseudo wire from point to multiple points
  • Realizing method for pseudo wire from point to multiple points

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Embodiment Construction

[0022] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0023] The present invention adopts two related methods to realize P2MP PW in the field of PWE3. When a CE needs to access multicast services (such as IPTV, DVB, etc.), the PE connected to it initiates the establishment of a multicast tree, that is, initiates the establishment of a P2MP PW. Both methods set the ingress PE of the multicast service as the root of the P2MP PW, and the egress PE as the leaf of the P2MP PW, and the leaf initiates the establishment of the P2MP PW; the difference is that in the first method, for a P2MP PW, the root It is suggested that the capabilities of the label and the root be the capabilities supported by the P2MP PW. For the leaf to join the P2MP PW, compare the capability supported by the leaf with the capability supported by the root to determine whether the leaf can join, so that the tags of all the leaves joining the P...

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Abstract

A method for realizing a point-to-multipoint pseudowire, the method comprising: setting an ingress network border router of a multicast service as a root of a point-to-multipoint pseudowire, and an exit network border router of a multicast service as a point-to-multipoint pseudowire leaf; the leaf requests the root to suggest a label, and in the process of suggesting a label by the root, the capability of the root is used as the capability supported by the point-to-multipoint pseudowire, and the leaf to be added to the point-to-multipoint pseudowire is supported Comparing the capabilities supported by the root with the capabilities supported by the root, it is determined whether the leaf can join the point-to-multipoint pseudowire, so that the labels of all leaves that join the point-to-multipoint pseudowire are consistent. The invention solves the problem of realizing P2MP PW in the field of PWE3 by using LDP signaling, and provides a method for realizing the simulated point-to-multipoint unidirectional multicast service on the packet switching network.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for realizing a point-to-multipoint pseudowire (Point to MultiPoint Pseudo Wire—P2MP PW). Background technique [0002] The edge-to-edge pseudowire emulation (Pseudo Wire EmulationEdge-to-Edge——PWE3) proposed by the IETF organization (Internet Engineering Task Force——Internet Engineering Task Force) is a network (Packet Switched Network——PSN) Simulate the mechanism of various point-to-point services. The simulated services can be TDM leased line, ATM, FR or Ethernet. PWE3 utilizes the tunnel mechanism on the PSN to simulate a necessary attribute of a service, and the tunnel here is called a pseudowire (PW). PWE3 can encapsulate the protocol data unit (Protocol Data Unit—PDU) of a specific service, and the PDU contains data and control information necessary for simulating a specific service. Using the PWE3 mechanism, operators can transfer all transmissio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L29/06H04L45/16
Inventor 邹世敏
Owner HUAWEI TECH CO LTD
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