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A protection switching method and device for a multi-protocol label switching network

A technology of multi-protocol label and protection switching, applied in the field of protection switching of multi-protocol label switching network, can solve the problem of long time and achieve the effect of shortening the protection

Active Publication Date: 2018-06-26
RAISECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the subnet connection protection switching method of first deleting and then creating the transit LSP requires two operations to write all transit LSP-related hardware entries, which takes a long time, so the switching operation time becomes the bottleneck of the protection switching performance

Method used

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  • A protection switching method and device for a multi-protocol label switching network
  • A protection switching method and device for a multi-protocol label switching network
  • A protection switching method and device for a multi-protocol label switching network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] This embodiment is the case where the hardware does not support the ordinary PTN forwarding chip of the standby transit lsp. In this embodiment, initially, the main transit lsp creates the entry entity in the forwarding chip, and the standby transit lsp does not create the entry in the forwarding chip. Entity; when a handover occurs, modify the message forwarding entry attribute content of the primary transit LSP in the chip to implement the handover.

[0067] Figure 9 It is a schematic flowchart of a protection switching method for a multi-protocol label switching network in Embodiment 1 of the present invention, which is applied to a PTN forwarding chip whose transit lsp only corresponds to one hardware table, and is combined as Figure 7 The creation process of the SNC1:1 protection shown, the method includes:

[0068] In step 901, the CPU stores the created primary transit LSP and sends the data record table of the primary transit LSP to the forwarding chip. Tabl...

Embodiment 2

[0098] This embodiment is the case where the hardware does not support the common PTN forwarding chip of the standby transit lsp. In this embodiment, initially, the main transit lsp is used to create the entry entity in the forwarding chip, and the standby transit lsp uses the reserved label to create the table in the forwarding chip. Item entity; when switching occurs, modify the message forwarding index corresponding to the incoming label identification entry of the primary transit LSP in the chip to implement switching.

[0099] In the PTN forwarding chip, the processing of transit lsp can be divided into two processes: incoming label identification and message forwarding. Therefore, in the PTN forwarding chip, the transit lsp can be designed as two tables—incoming label identification table and message forwarding table. Published; the form of the transit lsp in the PTN forwarding chip is the bound incoming label identification table and message forwarding table, and the for...

Embodiment 3

[0130] This embodiment is the case where the hardware supports the PTN forwarding chip of the standby transit lsp. In this embodiment, initially, the primary transit lsp creates an entry entity in the forwarding chip, and the standby transit lsp only creates the message forwarding entry entity ; When switching occurs, modify the message forwarding index corresponding to the incoming label identification entry of the main transit LSP in the chip to realize the switching.

[0131] In the PTN forwarding chip, the processing of transit lsp can be divided into two processes: incoming label identification and message forwarding. Therefore, in the PTN forwarding chip, the transit lsp can be designed as two tables—incoming label identification table and message forwarding table. Published; the form of transit lsp in the PTN forwarding chip is the bound inbound label identification table and message forwarding table, and the forwarding chip entry corresponding to the transitlsp needs to...

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Abstract

The invention discloses a protection switching method and device for an MPLS network. Message forwarding table entry; the forwarding chip generates the hardware forwarding table of the main transit LSP, the hardware forwarding table of the main transit LSP includes index, incoming label identification and message forwarding table entry, the main transit LSP returned by the forwarding chip to the CPU Index; store the standby transit lsp and data record table, the data record table of the standby transit lsp includes the input label of the standby transit lsp and the packet forwarding entry; when performing protection switching, the CPU will forward the index corresponding to the main transit lsp in the chip Change the packet forwarding entry of the packet to the packet forwarding entry of the standby transit LSP to be switched to. The invention realizes the fast switching of subnet connection 1:1 protection in MPLS.

Description

technical field [0001] The invention relates to the field of Multi-Protocol Label Switching (MPLS, Multi-Protocol Label Switching), in particular to a protection switching method and device for a Multi-Protocol Label Switching network. Background technique [0002] The communication system requires high reliability. For example, when a service is provisioned on a Packet Transport Network (PTN, Packet Transport Network), a corresponding service protection mechanism needs to be planned at the same time. The definition of G.8131 includes subnet connection (SNC, subnet connection) 1:1 protection, which is used to implement link protection at intermediate nodes in the network. The 1:1 protection of subnet connection is the protection between two transit label forwarding paths (transit lsp, transit label switched paths) with the same incoming label, such as figure 1 As shown, when the active link is selected to transmit services, the label forwarding path (lsp, label switched pat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/723H04L12/24H04L45/50
CPCH04L41/06H04L45/50
Inventor 邢家茂郭瑞王海龙彭兴文
Owner RAISECOM TECH