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Linear protection state switching method, device and system in mpls-tp

A linear protection and state switching technology, applied in the field of communication, can solve the problem of the continuation of the illegal state, achieve the effect of eliminating the illegal state and saving labor costs

Active Publication Date: 2017-12-26
RUIJIE NETWORKS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0029] The purpose of the present invention is to provide a linear protection state switching method, device and system in MPLS-TP, to overcome the problem of the continuation of the illegal state in the related art

Method used

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  • Linear protection state switching method, device and system in mpls-tp
  • Linear protection state switching method, device and system in mpls-tp
  • Linear protection state switching method, device and system in mpls-tp

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Embodiment 1

[0052] Such as figure 2 Shown is an exemplary flow chart of a linear protection state switching method in MPLS-TP in an embodiment of the present invention, and the method includes the following steps:

[0053] Step 201: When the current state is in the protection path unavailable state UA:P:L corresponding to the "protection path signal failure SF-P from the local input source", detect whether the SF-P exists.

[0054] Step 202: When the SF-P does not exist, automatically generate a state transition command to transition to a normal state, and transition the linear protection state of the local end to a normal state according to the command.

[0055] Wherein, the state transition command to switch to the normal state triggers the linear protection state to return to the normal state, for example, by generating a higher-level state transition command than the state transition command corresponding to the current state. Specifically, for example, first automatically generate ...

Embodiment 2

[0066] Taking the illegal state monitoring of the local end, automatically recovering from the illegal state, and driving the opposite end to perform self-recovery as an example, the method for switching the linear protection state in MPLS-TP in the embodiment of the present invention will be described in detail below, as follows: image 3 As shown, the method includes:

[0067] Step 301: MPLS-TP two ends A and Z are initially in a normal state, and send PSC messages of NR to each other.

[0068] Step 302: A signal fault occurs on the protection path between A and Z, and the linear protection state at the A and Z ends changes to UA:P:L state.

[0069] Wherein, at this time, for both ends, the state transition command with the highest priority is SF-P.

[0070] Step 303: A detects that the UA:P:L state is the preset linear protection state, and detects that there is a state transition instruction SF-P corresponding to the current state UA:P:L, and therefore does not perform an...

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Abstract

The present invention relates to a linear protection state switching method, device and system in MPLS-TP, the method comprising: the current state is in the protection path unavailable state UA corresponding to "protection path signal failure SF-P from a local input source": When P:L, detect whether the SF-P exists; when the SF-P does not exist, automatically generate a state transition instruction to convert to a normal state, and convert the linear protection state of the local end to a normal state according to the instruction. Through the method provided by the invention, the illegal linear protection state can be cleared automatically and in time.

Description

technical field [0001] The invention relates to the communication field, in particular to a method, device and system for switching linear protection states in MPLS-TP. Background technique [0002] In order to improve the usability of MPLS-TP (Multiprotocol Label Switching-Transport Profile, Multiprotocol Label Switching-Transport Function Framework), RFC6378 (MPLS Transport Profile (MPLS-TP) Linear Protection, MPLS-TP Linear Protection) defines a The PSC (Protection State Coordination Protocol, Protection State Coordination) protocol is used for MPLS-TP protection switching. It is used to negotiate the traffic forwarding state between two MPLS-TP endpoints. Two paths are established between two MPLS-TP endpoints, one is the working path and the other is the protection path. Under normal circumstances, the working path is used for traffic forwarding. In order to prevent the PSC protocol packets from interfering with normal traffic forwarding, the protection path is used fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/707H04L45/24
Inventor 戴志滨
Owner RUIJIE NETWORKS CO LTD
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