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Method and system for rapidly rerouting MPLS VPN (Multi-Protocol Label Switching Virtual Private Network)

A routing and fast technology, applied in the field of network communication, CE dual-homing PE network, can solve the problems of long time and low network convergence efficiency, save time and money costs, fast convergence effect is obvious, strong practicability and flexibility Effect

Active Publication Date: 2010-12-29
CHINA TELECOM CORP LTD
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  • Summary
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  • Claims
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Problems solved by technology

In the case of a complex network and a large number of VPNv4 routes, the time (t2+t3+t4) is very large, and the network convergence efficiency is low

Method used

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  • Method and system for rapidly rerouting MPLS VPN (Multi-Protocol Label Switching Virtual Private Network)
  • Method and system for rapidly rerouting MPLS VPN (Multi-Protocol Label Switching Virtual Private Network)
  • Method and system for rapidly rerouting MPLS VPN (Multi-Protocol Label Switching Virtual Private Network)

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Embodiment Construction

[0074] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are illustrated.

[0075] Before describing the fast rerouting method and system thereof of the present invention in detail, the process of message forwarding in the MPLSVPN network is briefly explained as follows:

[0076] In an MPLS VPN network, IP data packets contain inner and outer labels; the inner label indicates the VPN service label to which it belongs, and the outer label is a routing label to realize PE-to-PE MPLS packet forwarding. In MPLS VPN network The message forwarding process mainly includes:

[0077] 1. After the source-end backbone network edge device (PE) receives the normal IP data packet from the source-end user edge device (CE), the source-end backbone network edge device (PE) forwards the routing forwarding table (VRF) to which the source-end interface belongs. Add it to the corresponding VP...

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Abstract

The invention discloses method and system for rapidly rerouting an MPLS VPN (Multi-Protocol Label Switching Virtual Private Network). The rapid rerouting method comprises the following steps of: when detecting that a communicated link of user edge equipment (CE-A) at the target end is in failure, activating VPN v4 routing of standby backbone network edge equipment (PE-B) at the target end; packaging a new inner-layer label Li2 and an outer-layer label on the received database and transmitting the database to the standby backbone network edge equipment (PE-B) at the target end by using main backbone network edge equipment (PE-A) at the target end, wherein the next jump indication of the main backbone network edge equipment (PE-A) is used as a last-ump main backbone network core router (P-C) of the main backbone network edge equipment (PE-A) at the target end; and transmitting the database along an LSP (Label Switching Path) between the main backbone network edge equipment (PE-A) and the standby backbone network edge equipment (PE-B) at the target end at the moment.

Description

technical field [0001] The present invention relates to network communication technology, in particular to a method and system for fast rerouting of MPLS VPN (MultiProtocol Label Switch Virtual Private Network), and the method and system for fast rerouting of MPLS VPN are especially suitable for CE dual-homing in the telecommunications field PE network. Background technique [0002] Today, with the rapid development of network technology, more and more audio / video data and mobile services rely on IP networks for transmission. In the actual network architecture, the operator's own business (such as softswitch, mobile network) and VIP customer business generally use MPLSVPN to form a network. Operators attach great importance to the fault convergence speed of IP networks, especially MPLS VPN services. When any node fails, the protection switching speed of adjacent nodes is less than 50ms, and the end-to-end service convergence of less than 1s has gradually become the threshol...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/46H04L12/26H04L29/06H04L45/24
Inventor 陆小铭杨广铭李文云吴湘东张伟贾曼杨国良唐宏徐建锋
Owner CHINA TELECOM CORP LTD
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