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Method and device for establishing operator multicast tree in dam system

A technology of multicast tree and operator, applied in the direction of transmission system, digital transmission system, data exchange network, etc., it can solve problems such as the inability to establish multicast tunnels

Active Publication Date: 2019-09-24
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, however, RFC 7117 only supports MPLS-based multicast tunnels, such as point-to-multipoint (P2MP) label-switched paths (LSPs) established through Resource Reservation Protocol-Traffic Engineering (RSVP-TE), or through label The P2MP LSP established by the multipoint extension of the distribution protocol (mLDP), and these multicast tunnels cannot be established in the pure IP underlying network where we assume that DAM is deployed

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  • Method and device for establishing operator multicast tree in dam system
  • Method and device for establishing operator multicast tree in dam system
  • Method and device for establishing operator multicast tree in dam system

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Embodiment Construction

[0043] In the following detailed description of alternative embodiments, reference is made to the accompanying drawings which form a part hereof. The drawings show, by way of example, specific embodiments in which the disclosure can be practiced. However, it should be understood that example embodiments are not intended to be exhaustive of all embodiments in accordance with the present disclosure.

[0044] The following embodiments use the architecture and terminology of IETF NVO3 to describe the distributed access multiplexer, and use the L2 service based on the NVO3 architecture as an example to illustrate.

[0045] The DAM modules that need to be added to the operator's multicast tree can be divided into two categories - root nodes and leaf nodes. The root node sends BUM or user multicast traffic to leaf nodes on the point-to-multipoint overlay tunnel (that is, on the operator multicast tree), and sends unicast traffic with a known destination MAC address on the point-to-p...

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Abstract

Embodiments of the present disclosure provide a method and device for establishing an operator multicast tree in a DAM system, the method comprising: transferring a Border Gateway Protocol BGP message BGP‑VNAD‑ between network elements in the DAM system At least one of IPMSI or BGP-VNAD-SPMSI is used to establish the operator multicast tree; wherein the BGP-VNAD-IPMSI message and the BGP-VNAD-SPMSI message include the following attributes: MP_REACH_NLRI attribute, PMSI_TUNNEL attribute, and BGP encapsulation extended community attribute.

Description

technical field [0001] Embodiments of the present disclosure relate to distributed access multiplexers. More specifically, the embodiments of the present disclosure relate to a method and device for establishing an inclusive or selective operator multicast tree in a distributed access multiplexer system. Background technique [0002] The technical problem to be solved by the embodiments of the present disclosure originates from the Distributed Access Multiplexer (DAM) model. Before discussing specific technical issues, some background technologies of DAM are introduced. [0003] In a nutshell, a DAM is an access device consisting of distributed modules interconnected by any form of "virtual link". A "virtual link" refers to a layer 2 (L2) overlay tunnel established on a layer 3 (L3) underlay network. L2 overlay tunnels can be point-to-point tunnels as well as point-to-multipoint tunnels. figure 1 A logical model of the DAM is shown. [0004] figure 1 The deployment mod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/761H04L12/723H04L45/16H04L45/50
CPCH04L45/16H04L45/50
Inventor 张立新
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD