Protection switching method and equipment thereof

A post-switching, backup path technology, applied in the field of communication, can solve the problem of difficult to meet the requirements of fast recovery of faults, and achieve the effect of improving the speed of path switching

Active Publication Date: 2010-03-10
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0022] The problem in the prior art is that each route or each CE has a main inner layer label and a backup inner layer label; in the case of a large number of VPNs and a large number of CE sites, such as thousands of CE sites In this case, when the primary path and the standby path are switched, the internal labels and external network labels of thousands of paths need to be switched.
Therefore, it is difficult to meet the requirements of fast recovery from failures in some applications

Method used

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  • Protection switching method and equipment thereof
  • Protection switching method and equipment thereof

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specific Embodiment approach

[0077] In the application scenario of the present invention, two VPNs are established, namely VPN1 and VPN2. The FEC and label information of VPN1 are marked in gray fonts, and the FEC and label information of VPN2 are marked in black fonts.

[0078] Among them, CE1 and CE3 belong to VPN1, CE2 and CE4 belong to VPN2, CE1 is connected to PE1 and PE2 at the same time to form CE dual-homing; CE2 is connected to PE1 and PE2 to form CE dual-homing at the same time. For VPN1, CE3-PE3-PE1-CE1 is the primary path, CE3-PE3-PE2-CE1 is the backup path; for VPN2, CE4-PE3-PE1-CE2 is the primary path, CE4-PE3-PE2-CE2 is the backup path. That is, for PE3, PE3 is configured with a primary path and a backup path for the visited routes CE1 and CE2, that is, CE dual-homing.

[0079] The LSP tunnel information in this networking scenario is as follows: the LSP tunnel label 1024 assigned by PE1 to PE3 is the primary tunnel label; the tunnel label 1025 assigned by PE2 to PE3 is the backup tunnel l...

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Abstract

The invention discloses a protection switching method and equipment thereof. The method is used for PE in MPLS L3VPN, the PE is provided with a primary path and a standby path about a called route, and a forwarding table of the PE is previously memorized with a primary inner layer mark corresponding to the primary path and a standby inner layer mark corresponding to the standby path. The method comprises the steps of: when occurring path switching, obtaining the switched path attribute and a corresponding outer layer mark, wherein the path attribute comprises the primary path or the standby path; obtaining the corresponding inner layer mark according to the switched path attribute in the forwarding table; and enveloping and transmitting a report with the obtained outer layer mark and the inner network mark. The invention realizes the fast switching of the inner layer mark and an outer network mark of the path when switching the primary path with the standby path.

Description

technical field [0001] The invention relates to the communication field, in particular to a protection switching method and equipment. Background technique [0002] MPLS (Multi-Protocol Label Switch, Multi-Protocol Label Switching) VPN (Virtual Private Network, virtual private network) is a PE (ProviderEdge, service provider edge router)-based L3VPN (Layer3 VPN, three-layer VPN) technology, which uses BGP (Border Gateway Protocol, Border Gateway Protocol) to advertise VPN routes in the service provider's backbone network, and uses MPLS to forward VPN packets on the service provider's backbone network. The BGP / MPLS VPN networking method is flexible, has good scalability, and can easily support MPLS QoS (Quality of Service, service quality) and MPLS TE (Traffic Engineering, traffic engineering), so it has been applied more and more. [0003] A schematic diagram of a typical BGP / MPLS VPN networking solution in the prior art is as follows figure 1 shown, including: [0004] S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L12/46H04L29/06H04L45/24
Inventor 管树发
Owner NEW H3C TECH CO LTD
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