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Method and system for realizing multicast protection

A technology for multicasting and multicasting data. It is applied in transmission systems, digital transmission systems, and devices that provide special services in branches. It can solve problems such as the inability of performance to meet high-performance requirements, and achieve high-efficiency protection switching requirements and high network security. , the effect of fast switching

Active Publication Date: 2011-04-20
ZTE CORP
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  • Claims
  • Application Information

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Problems solved by technology

However, a problem with such a protection method is that the time for switching between the active and standby links and the interaction process of the multicast protocol will make the performance of this protection method unable to meet the growing demand for high performance

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  • Method and system for realizing multicast protection
  • Method and system for realizing multicast protection
  • Method and system for realizing multicast protection

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Embodiment Construction

[0035] The basic idea of ​​the present invention is to configure the primary link and the backup link for the pseudowire (PW) between the uplink operator edge equipment (PE) and the downlink PE; the downlink PE and the uplink PE separately establish a transmission multi-protocol label exchange (T- MPLS) multicast forwarding table; the uplink PE sends the obtained multicast data message to the downlink PE via the active and standby links at the same time, and the downlink PE receives the received multicast data from the main link according to the T-MPLS multicast forwarding table The multicast data packet is forwarded to the corresponding user edge device (CE), and the multicast data packet received from the backup link is discarded; when the primary link fails, the primary and backup links are switched, and the downstream PE will The multicast data message received by the backup link is forwarded to the CE.

[0036] Hereinafter, the present invention will be further described in ...

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Abstract

The invention discloses a method for realizing multicast protection. The method comprises the following steps: a main link and a backup link are configured for a PW (pseudo wire) between uplink PE (provider edge) and downlink PE; the downlink PE and the uplink PE establish a T-MPLS (transmission-multiprotocol label switching) multicast forwarding table respectively; the uplink PE sends an acquired multicast data message to the downlink PE through the master / slave links simultaneously; the downlink PE forwards the multicast data message received from the main link to corresponding CE (customer edge) according to the T-MPLS multicast forwarding table, and discards the multicast data message received from the backup link; and when the main link fails, the main link is switched to the backup link, and the downlink PE forwards the multicast data message received from the backup link to the CE. The invention also provides a system for realizing multicast protection. Through the technical scheme of the invention, normal transmission of multicast services can be guaranteed when a link in the T-MPLS network fails.

Description

Technical field [0001] The present invention relates to a Transmission-Multiprotocol Label Switching (T-MPLS, Transmission-Multiprotocol Label Switching) network in the communication field, and in particular to a method and system for realizing multicast protection. Background technique [0002] T-MPLS is a connection-oriented packet transmission technology based on Multiprotocol Label Switching (MPLS) defined by the International Telecommunication Union (ITU-T, ITU Telecommunication Standardization Sector). T-MPLS data The forwarding plane is a subset of MPLS, and its data is forwarded based on T-MPLS labels. T-MPLS is the application of MPLS in the transport network. It simplifies some complex functions of the data forwarding plane of MPLS, and adds connection-oriented operations, management, maintenance (OAM, Operation Administration and Maintenance) and protection restoration functions. . [0003] The multicast technology of the T-MPLS network effectively solves the problem o...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/18H04L12/56H04L45/50
CPCH04L45/22H04L45/28H04L45/68H04L41/0663H04L45/16
Inventor 邓涛鸿
Owner ZTE CORP
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