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MPLS TE FRR fast switching method and device thereof

A technology for fast switching and unit replacement, applied in the field of communications, can solve problems such as failure to protect the normal transmission of business traffic, loss of business traffic, and long-term interruption of business traffic, and achieve the effect of avoiding loss of business traffic and fast switching.

Active Publication Date: 2012-01-04
NEW H3C TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0015] When the local repair node needs to implement MPLS TE FRR, the local repair node rewrites the hardware parameter group of the hardware table item one by one, resulting in a long time for MPLS TE FRR switchover, which in turn causes a long-term interruption of service traffic from the head node of the LSP to the tail node of the LSP. The loss of business traffic cannot protect the normal transmission of business traffic between the LSP head node and the LSP tail node, which has a great impact on users

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  • MPLS TE FRR fast switching method and device thereof
  • MPLS TE FRR fast switching method and device thereof
  • MPLS TE FRR fast switching method and device thereof

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Embodiment Construction

[0060] The core idea of ​​the present invention is: the local repair node in the LSP tunnel establishes a software entry, and the software entry is the image of the hardware entry required by the local repair node to forward the message sent by the LSP head node to the LSP tail node, that is, the software The structure and content of the entries are exactly the same as those of the hardware entries. The local repair node forwards the message through the LSP tunnel between the LSP head node and the LSP tail node. When the MPLS TE network partially fails, the LSP between the local repair node and the next hop node or the next hop node fails, causing the LSP The head node fails to send the message to the LSP tail node through the primary LSP tunnel; at this time, the local repair node performs MPLS TE FRR switchover and modifies the software entry according to the pre-established backup LSP. After the modification of the software entry is completed, the local repair node will DMA...

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Abstract

The invention discloses an MPLS TE FRR fast switching method and a device thereof. The method comprises the following steps: a local repair node creates a software list item corresponding to a hardware list item and being the mapping of the hardware list item; the local repair node sends messages through a main tunnel according to the hardware list item; when the main tunnel fails, the local repair node modifies the software list item according to the attribute of a backup tunnel and the modified software list item is written in the storage space of the hardware list item in hardware by a direct memory access (DMA) method to replace the hardware list item; and the local repair node switches the main tunnel to the backup tunnel according to the replaced hardware list item and continues to send messages through the backup tunnel so as to realize the fast switching of MPLS TE FRR. In the invention, the software list item is added in the local repair node to realize the fast switching of MPLS TE FRR, thereby avoiding loss in traffic flow.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for MPLS TE FRR fast switching. Background technique [0002] Traditional routers choose the shortest path as the route without considering factors such as bandwidth. In this way, even if a certain path is congested, the router will not switch the traffic to other paths. In the case of heavy network traffic, it will cause network Severe congestion of traffic and prolonged interruption of network communication. [0003] MPLS (Multiprotocol Label Switching, multi-protocol label switching) TE (Traffic Engineering, traffic engineering), by combining traffic engineering technology with MPLS technology, according to the distribution of network resources in the MPLS TE network, it can provide LSP ( Label Switching Path, label switching path) tunnel, the LSP tunnel includes several LSP paths. Specifically, in the case of tight network resources, MPLS TE can establi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/56H04L12/24H04L45/247H04L45/50
Inventor 韩立峰
Owner NEW H3C TECH CO LTD
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