CN104506428A - Method, device and system for switching linear protection state in MPLS-TP (multiprotocol label switching-transport profile) - Google Patents
Method, device and system for switching linear protection state in MPLS-TP (multiprotocol label switching-transport profile) Download PDFInfo
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Abstract
The invention relates to a method, a device and a system for switching a linear protection state in an MPLS-TP (multiprotocol label switching-transport profile). The method comprises the following steps: when the current state is that a protecting route corresponding to a protecting route signal failure SF-P from a local input source is in an unavailable state UA:P:L, detecting whether the SF-P exists or not; when the SF-P does not exist, automatically generating a state switching command for switching to a normal state, and switching a linear protection state of a terminal into the normal state according to the command. According to the method provided by the invention, the illegal linear protection state can be automatically and timely eliminated.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of MPLS-TP neutral line guard mode changing method, Apparatus and system.
Background technology
In order to improve MPLS-TP (Multiprotocol Label Switching-Transport Profile; multiprotocol label switching-transmitting function framework) availability; RFC6378 (MPLS Transport Profile (MPLS-TP) Linear Protection; MPLS-TP linear protection) in; define the pretection switch that a kind of PSC (Protection State Coordination Protocol, guard mode is coordinated) agreement is used for MPLS-TP.It is for consulting the traffic forwarding state between MPLS-TP two end points.Two paths are set up between MPLS-TP two end points; article one, be operating path, one is Protection path, uses operating path to carry out traffic forwarding under normal circumstances; and in order to make PSC protocol massages not disturb normal traffic forwarding, therefore preferentially use Protection path to carry out the transmission of PSC message.Wherein MPLS-TP linear protection state comprises:
1) normal condition: operating path and Protection path distribute completely, and activate, data traffic (by selecting) is transmitted on operating path, does not have trigger event to be reported to this protected field.
2) Protection path down state: this Protection path down state can comprise:
UA:P:L, the down state that " the Protection path signal fault SF-P from local input source " causes.
UA:P:R, the down state caused due to the SF message of far-end input source on Protection path.
UA:LO:R, the down state caused due to far-end lockout (Route Locking).
PF:W:L, " the operating path signal fault SF-W from local input source " and the protection malfunction caused.
What affect the change of linear guard mode is State Transferring message from two input sources: these two input sources are respectively local input source and far-end input source; according to the priority order successively driving the conversion of linear guard mode, the State Transferring message of local input source comprises:
(1) OC, Clear (removing) operation of user.
(2) LO, the Lockout operation of user.
(3) SF-P, Protection path signal fault;
(4) SF-W, operating path signal fault.
(5) SFc, Protection path clear signal fault
(6) SFc, operating path clear signal fault
In addition, according to the priority order successively driving the conversion of linear guard mode, the State Transferring message from far-end input source comprises:
(1) LO, user carries out lockout operation at far-end.
(2) NR, far-end end points does not have exceptional condition to report
Because SFc priority is less than SF-P and SF-W, after SF-P or SF-W input source therefore may be caused to remove, but the state of linear protection is still UA:P:L or PF:W:L state.
Concrete, with reference to Fig. 1:
Step 101:MPLS-TP ends A and Z are in normal condition at first, mutually send the PSC message of NR.
Protection path generation signal fault between step 102:A and Z.The linear protection state of A and Z end becomes UA:P:L state.
Step 103: the operating path afterwards between A and Z also signal fault occurs, because SF-W priority is less than SF-P, therefore the linear protection state of A and Z end is still UA:P:L.
Step 104: on the Protection path between A and Z, signal fault is removed; SF-P before removing thus; now the input source of limit priority is SF-W (higher than Protection path clear signal fault SFc priority); but SF-W cannot order about linear protection state and change, therefore linear protection state is still UA:P:L
Step 105: on the operating path between A and Z, signal fault is removed, but operating path clear signal fault SFc can not make a difference to existing linear protection state.So linear protection state continues as UA:P:L.
As can be seen from example above; because the signal fault on Protection path is removed; but linear protection state is still UA:P:L; if not higher than the input of SF-P; i.e. manual order LO or FS of the prior art, this illegal state will continue always, and illegal state complicated operation is eliminated in manual intervention; and manual operation can not eliminate illegal state in time.
Summary of the invention
The object of this invention is to provide a kind of MPLS-TP neutral line guard mode changing method, Apparatus and system, to overcome the problem that illegal state in correlation technique continues always.
On the one hand, the invention provides a kind of MPLS-TP neutral line guard mode changing method, described method comprises:
During current state is in " the Protection path signal fault SF-P from local input source " corresponding Protection path down state UA:P:L, detect whether there is described SF-P;
When there is not described SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal.
Again on the one hand, the invention provides a kind of MPLS-TP neutral line guard mode switching device shifter, described device comprises:
Detection module, when being in the Protection path down state UA:P:L of " the Protection path signal fault SF-P from local input source " correspondence for current state, detects whether there is described SF-P;
First handover module, for when there is not described SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal
Again on the one hand, the invention provides a kind of MPLS-TP neutral line guard mode switched system, described system comprises:
Local terminal, local terminal, when being in the Protection path down state UA:P:L of " the Protection path signal fault SF-P from local input source " correspondence for current state, detects whether there is described SF-P; When there is not described SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal; And send the guard mode that the expression user that automatically generates carries out Route Locking operation LO at far-end to opposite end and coordinate PSC message, be because far end path locks the Protection path down state UA:LO:R caused to indicate opposite end by linear protection State Transferring; Sending the expression far-end automatically generated to opposite end does not have exceptional condition to report the PSC message of NR, is removed by the PSC message of LO to indicate opposite end;
Linear protection State Transferring for receiving the PSC message of LO, and is UA:LO:R state by opposite end; And receive the PSC message of NR, remove the PSC message of LO to return to normal condition.
The present invention at least has following beneficial effect: the embodiment of the present invention, by detecting whether there is the State Transferring message corresponding with current state, realizes automatic decision current state and whether is in illegal state; By the State Transferring instruction that automatic T.G Grammar is normal condition, and be that normal condition realizes automatically illegal state being converted to normal condition by the linear protection State Transferring of local terminal according to this instruction, thus elimination illegal state continues always, in addition, replace manually eliminating illegal state by the State Transferring instruction automatically generated, can human cost be saved, realize automation and remove illegal state; In addition, after being in illegal state, perform associative operation relative to artificial observation, more can eliminate illegal state timely and effectively.
In addition, local terminal, by sending State Transferring instruction to opposite end, can make opposite end also can eliminate illegal state voluntarily, make opposite end also without the need to manual intervention, can revert to normal condition timely from illegal state.So illegal state is eliminated in the self-recovery that the two ends of communication have one end can realize active, and the two ends of communication just can all realize eliminating illegal state, and self-recovery is come from illegal state.
Should be understood that, it is only exemplary and explanatory that above general description and details hereinafter describe, and can not limit the present invention.
Accompanying drawing explanation
Fig. 1 is the exemplary process diagram of MPLS-TP neutral line guard mode changing method in prior art;
Fig. 2 is one of exemplary process diagram of MPLS-TP neutral line guard mode changing method in the embodiment of the present invention;
Fig. 3 is the exemplary process diagram two of MPLS-TP neutral line guard mode changing method in the embodiment of the present invention;
Fig. 4 is one of schematic diagram of MPLS-TP neutral line guard mode switching device shifter in the embodiment of the present invention;
Fig. 5 is the schematic diagram two of MPLS-TP neutral line guard mode switching device shifter in the embodiment of the present invention;
Fig. 6 is the schematic diagram of MPLS-TP neutral line guard mode switched system in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described, should be appreciated that embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.Execution mode described in following exemplary embodiment does not represent all execution modes consistent with the present invention.On the contrary, they only with as in appended claims describe in detail, the example of apparatus and method that aspects more of the present invention are consistent.
The embodiment of the present invention provides a kind of MPLS-TP neutral line guard mode changing method, is applicable to owing to driving the priority of the State Transferring message of linear guard mode to arrange the problem causing illegal state to continue always.Concrete; in the linear protection state switching method that the embodiment of the present invention provides; when being in UA:P:L state by current state; detect and whether there is the State Transferring message corresponding with current state namely from the SF-P of local input source; when there is not this SF-P; T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal.Make not need manually to intervene, illegal state can be eliminated timely.Below by simple embodiment, MPLS-TP neutral line guard mode changing method in the embodiment of the present invention is described in detail.
Embodiment one
As shown in Figure 2, in the embodiment of the present invention, the exemplary process diagram of MPLS-TP neutral line guard mode changing method, the method comprises the following steps:
Step 201: during current state is in " the Protection path signal fault SF-P from local input source " corresponding Protection path down state UA:P:L, detect whether there is described SF-P.
Step 202: when there is not described SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal.
Wherein, the State Transferring instruction being converted to normal condition is such as by generating the more senior State Transferring instruction of the State Transferring instruction more corresponding than current state, triggering linear protection recovering state to normal condition.Concrete; such as; first automatically generate the LO State Transferring instruction of an expression " the Lockout operation of user "; this locality is driven to be converted to Protection path down state corresponding to LO State Transferring instruction from current illegal state; and then automatically generate the OC State Transferring instruction of an expression " the Clear operation of user "; for the LO State Transferring instruction that the front simulation removed generates, after linear protection state is changed again, become the normal condition that the instruction of LO State Transferring is corresponding.It should be noted that, the LO State Transferring instruction of above-mentioned Lockout of the user " operation " just generates after being not actual user executable operations, but local terminal generates automatically.
To sum up, the embodiment of the present invention, by detecting whether there is the SF-P message corresponding with UA:P:L state, realizes automatic decision current state and whether is in illegal state; By the State Transferring instruction that automatic T.G Grammar is normal condition, and be that normal condition realizes automatically illegal state being converted to normal condition by the linear protection State Transferring of local terminal according to this instruction, thus elimination illegal state continues always, in addition, replace manually eliminating illegal state by the State Transferring instruction automatically generated, can human cost be saved, realize automation and remove illegal state; In addition, after being in illegal state, perform associative operation relative to artificial observation, more can eliminate illegal state timely and effectively.
Further, for making opposite end also automatically can eliminate illegal state, after the linear protection State Transferring of local terminal is normal condition by execution step 102, can also continue to perform following steps:
Linear protection State Transferring is because far end path locks the Protection path down state UA:LO:R caused to indicate opposite end by steps A 1: send the expression user automatically generated to opposite end and carry out at far-end the PSC message that Lockout operates LO.
Wherein, it should be noted that " user carries out Lockout at far-end and operates the PSC message of LO " is not generate after user performs Lockout operation, but local terminal generates automatically.
Wherein, for opposite end; PSC message from the LO of far-end is a State Transferring instruction that linear guard mode can be driven to send change; this instruction is higher than State Transferring instruction corresponding to the illegal state of opposite end, and the PSC message that therefore local terminal sends LO to opposite end can drive far-end to carry out the change of linear protection state.
Steps A 2: sending the far-end automatically generated to opposite end does not have exceptional condition to report the PSC message of NR, is removed by the PSC message of LO to indicate opposite end.
Wherein, again send the PSC message of NR to opposite end by steps A 2, to realize removing the PSC message sending LO sent in steps A 1, thus make opposite end can according to the regulation of agreement; drive and again the linear protection state of self is changed, and change to the normal condition of the regulation of agreement.
So, even if opposite end performs step 201 to realize the detection of illegal state unlike local terminal, local terminal also can make opposite end also can eliminate illegal state voluntarily by above-mentioned steps A1-steps A 2, make opposite end also without the need to manual intervention, normal condition can be reverted to timely from illegal state.So illegal state is eliminated in the operation realization self-recovery initiatively that the two ends of communication have one end can perform step 201-step 202, and the two ends of communication just can all realize eliminating illegal state, and self-recovery is come from illegal state.
Further; when the current state in step 201 is UA:P:L; after performing step 202; can also continue to perform following operation: when the State Transferring message that current priority is the highest is " the operating path signal fault SF-W from local input source ", normal condition be switched to the protection malfunction PF:W:L corresponding with described SF-W.Thus, the lower SF-W of SF-P priority that compares introduced in the prior art becomes the highest State Transferring instruction of pending priority, can realize the change of linear protection state.Make local terminal can carry out the change of linear protection state smoothly according to remaining State Transferring instruction.
Embodiment two
Carry out illegal state monitoring with local terminal below, automatically recover from illegal state, and to drive opposite end to carry out self-recovery be example, be described in detail to MPLS-TP neutral line guard mode changing method in the embodiment of the present invention, as shown in Figure 3, the method comprises:
Step 301:MPLS-TP ends A and Z are in normal condition at first, mutually send the PSC message of NR.
Protection path generation signal fault between step 302:A and Z, the linear protection state of A and Z end becomes UA:P:L state.
Wherein, now, for two ends, the State Transferring instruction that priority is the highest is SF-P.
Step 303:A detects that UA:P:L state is predetermined linear guard mode, and detects to there is the State Transferring instruction SF-P corresponding with current state UA:P:L, does not therefore perform any operation.
Wherein, now, for two ends, the State Transferring instruction that priority is the highest is SF-P.
Also there is signal fault in the operating path between step 304:A and Z, the linear protection state of A and Z is still UA:P:L.
Wherein, after the operating path between A and Z also signal fault occurs, two ends all receive State Transferring instruction SF-W, but the priority of SF-W is less than SF-P, and therefore the linear protection state of A and Z is still UA:P:L.So now, for two ends, the State Transferring instruction that priority is the highest is SF-P, is secondly SF-W.
Step 305:A detects that UA:P:L state is predetermined linear guard mode, and detects to there is the State Transferring instruction SF-P corresponding with current state UA:P:L, does not therefore perform any operation.
On Protection path between step 306:A and Z, signal fault is removed, and two ends all generate the State Transferring instruction SFc of Protection path clear signal fault, and remove the State Transferring instruction SF-P being present in self according to this instruction.
Wherein, now, for two ends, the State Transferring instruction that priority is the highest is SF-W.
Step 307:A detects that UA:P:L state is predetermined linear guard mode, and detects to there is not the State Transferring instruction SF-P corresponding with current state UA:P:L.
Step 308:A automatically generates and represents that user carries out the State Transferring instruction of the LO of Lockout operation at far-end, to drive local terminal self from UA:P:L State Transferring for Protection path down state, automatically generates simultaneously and sends the PSC message of LO to Z.
Wherein, after A generates the State Transferring instruction of LO automatically, the priority of the State Transferring instruction of LO, higher than the priority of SF-W, therefore, drives local terminal and is converted to Protection path down state from linear protection state UA:P:L.
Step 309:A generates the OC State Transferring instruction of expression " the Clear operation of user " automatically, is converted to normal condition to drive local terminal from Protection path down state.
Wherein, after A generates the State Transferring instruction of OC automatically, according to agreement regulation, the State Transferring instruction of OC removes the State Transferring instruction of LO, and therefore, the linear protection state driving local terminal is converted to normal condition from Protection path down state.
Step 310:A sends to Z the expression far-end automatically generated does not have exceptional condition to report the PSC message of NR.
Step 311:A holds the highest State Transferring instruction of now priority to be SF-P from far-end input source, so the linear protection state of A is converted to UA:P:R state by normal condition.
The expression user that step 312:Z reception A sends carries out the PSC message of the LO of Lockout operation at far-end, and is converted to UA:LO:R according to this message driving self from linear protection state UA:P:L.
Wherein, for Z, the PSC message of the PSC message of its LO the received LO that to be input source be from far-end, namely this message is a bar state conversion instruction.Before the PSC message of the LO received at Z, the State Transferring instruction that priority is the highest is SF-W, but the priority of the PSC message of LO is higher than SF-W.So the linear protection state of Z will be converted to UA:LO:R from UA:P:L.
The expression far-end that step 313:Z reception A sends does not have exceptional condition to report the PSC message of NR, and according to this message, linear protection state is converted to normal condition from UA:LO:R.
Wherein, not having exceptional condition to report the PSC message of NR for the expression far-end received Z, is a bar state conversion instruction equally.So, normal condition will be converted to from UA:LO:R according to agreement regulation Z.
Wherein, after Z execution step 313 is converted to normal condition; regulation according to RFC6378 agreement does not have exceptional condition to report the PSC message of NR by sending far-end to A, and impelling A according to this message, is normal condition by the UA:P:R State Transferring of linear protection state from step 311.
In addition, it should be noted that the regulation according to RFC6378 agreement, input source is the PSC message of far-end, and the same time only exists one, and according to time order and function order, after the PSC message of the input source that receives to be the PSC message of far-end by the input source received before covering be far-end.
Step 314: for Z; after step 313, the State Transferring instruction that its priority is the highest is local SF-W, therefore; after Z end is converted to normal condition, it can drive linear guard mode to be transformed to PF:W:L state local SF-W from the State Transferring instruction that priority is the highest.
Step 315: for A, after step 313, the State Transferring instruction that its priority is the highest is local SF-W, therefore it can drive linear guard mode to be transformed to PF:W:L state local SF-W from the State Transferring instruction that priority is the highest.
Step 316: on the operating path between A and Z, signal fault is removed, and two ends receive the SFc of operating path clear signal fault, therefore remove SF-W, and two ends will be in normal condition.
The embodiment of the present invention, is detected and self-recovery by A end oneself, achieves and automatically eliminate illegal state, and by sending the PSC message of LO and the PSC message of NR to opposite end, make opposite end to eliminate illegal state, in addition, two ends all achieve automatic self-recovery.Eliminate illegal state by way of manual operation compared to existing technology, can human cost be saved, realize automation and remove illegal state; In addition, after being in illegal state, perform associative operation relative to artificial observation, more can eliminate illegal state timely and effectively.
On the other hand, the embodiment of the present invention also provides a kind of MPLS-TP neutral line guard mode switching device shifter, and as shown in Figure 4, be the schematic diagram of this device, this device comprises:
Detection module 401, when being in the Protection path down state UA:P:L of " the Protection path signal fault SF-P from local input source " correspondence for current state, detects whether there is described SF-P;
First handover module 402, for when there is not described SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal.
Further, as shown in Figure 5, described device also comprises:
First sending module 403, for for when described first handover module is not when existing SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and after according to this instruction the linear protection State Transferring of local terminal being normal condition, sending the guard mode that the expression user that automatically generates carries out Route Locking operation LO at far-end to opposite end and coordinate PSC message, is because far end path locks the Protection path down state UA:LO:R caused to indicate opposite end by linear protection State Transferring;
Second sending module 404, does not have exceptional condition to report the PSC message of NR for sending the expression far-end automatically generated to opposite end, is removed by the PSC message of LO to indicate opposite end.
Further, as shown in Figure 5, described device also comprises:
Second handover module 405; for for when described first handover module is not when existing SF-P; automatic T.G Grammar is the State Transferring instruction of normal condition; and after according to this instruction the linear protection State Transferring of local terminal being normal condition; when the State Transferring message the highest when current priority is " the operating path signal fault SF-W from local input source ", normal condition is switched to the protection malfunction PF:W:L corresponding with described SF-W.
Again on the one hand, the embodiment of the present invention also provides a kind of MPLS-TP neutral line guard mode switched system, and as shown in Figure 6, be the schematic diagram of this system, this system comprises:
Local terminal 601, when being in the Protection path down state UA:P:L of " the Protection path signal fault SF-P from local input source " correspondence for current state, detects whether there is described SF-P; When there is not described SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal; And send the guard mode that the expression user that automatically generates carries out Route Locking operation LO at far-end to opposite end and coordinate PSC message, be because far end path locks the Protection path down state UA:LO:R caused to indicate opposite end by linear protection State Transferring; Sending the expression far-end automatically generated to opposite end does not have exceptional condition to report the PSC message of NR, is removed by the PSC message of LO to indicate opposite end;
Linear protection State Transferring for receiving the PSC message of LO, and is UA:LO:R state by opposite end 602; And receive the PSC message of NR, remove the PSC message of LO to return to normal condition.
About the device in above-described embodiment, wherein the concrete mode of modules executable operations has been described in detail in about the embodiment of the method, will not elaborate explanation herein.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (7)
1. a MPLS-TP neutral line guard mode changing method, is characterized in that, described method comprises:
During current state is in " the Protection path signal fault SF-P from local input source " corresponding Protection path down state UA:P:L, detect whether there is described SF-P;
When there is not described SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal.
2. method according to claim 1; it is characterized in that, described when there is not SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition; and after according to this instruction the linear protection State Transferring of local terminal being normal condition, described method also comprises:
Sending the guard mode that the expression user that automatically generates carries out Route Locking operation LO at far-end to opposite end and coordinate PSC message, is because far end path locks the Protection path down state UA:LO:R caused to indicate opposite end by linear protection State Transferring;
Sending the expression far-end automatically generated to opposite end does not have exceptional condition to report the PSC message of NR, removes the PSC message of LO to return to normal condition to indicate opposite end.
3. method according to claim 1; it is characterized in that, described when there is not SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition; and after according to this instruction the linear protection State Transferring of local terminal being normal condition, described method also comprises:
When the State Transferring message that current priority is the highest is " the operating path signal fault SF-W from local input source ", normal condition is switched to the protection malfunction PF:W:L corresponding with described SF-W.
4. a MPLS-TP neutral line guard mode switching device shifter, is characterized in that, described device comprises:
Detection module, when being in the Protection path down state UA:P:L of " the Protection path signal fault SF-P from local input source " correspondence for current state, detects whether there is described SF-P;
First handover module, for when there is not described SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal.
5. device according to claim 4, is characterized in that, described device also comprises:
First sending module, for when described first handover module is not when existing SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and after according to this instruction the linear protection State Transferring of local terminal being normal condition, sending the guard mode that the expression user that automatically generates carries out Route Locking operation LO at far-end to opposite end and coordinate PSC message, is because far end path locks the Protection path down state UA:LO:R caused to indicate opposite end by linear protection State Transferring;
Second sending module, does not have exceptional condition to report the PSC message of NR for sending the expression far-end automatically generated to opposite end, is removed by the PSC message of LO to indicate opposite end.
6. device according to claim 4, is characterized in that, described device also comprises:
Second handover module; for when described first handover module is not when existing SF-P; automatic T.G Grammar is the State Transferring instruction of normal condition; and after according to this instruction the linear protection State Transferring of local terminal being normal condition; when the State Transferring message the highest when current priority is " the operating path signal fault SF-W from local input source ", normal condition is switched to the protection malfunction PF:W:L corresponding with described SF-W.
7. a MPLS-TP neutral line guard mode switched system, is characterized in that, described system comprises:
Local terminal, when being in the Protection path down state UA:P:L of " the Protection path signal fault SF-P from local input source " correspondence for current state, detects whether there is described SF-P; When there is not described SF-P, automatic T.G Grammar is the State Transferring instruction of normal condition, and is normal condition according to this instruction by the linear protection State Transferring of local terminal; And send the guard mode that the expression user that automatically generates carries out Route Locking operation LO at far-end to opposite end and coordinate PSC message, be because far end path locks the Protection path down state UA:LO:R caused to indicate opposite end by linear protection State Transferring; Sending the expression far-end automatically generated to opposite end does not have exceptional condition to report the PSC message of NR, is removed by the PSC message of LO to indicate opposite end;
Linear protection State Transferring for receiving the PSC message of LO, and is UA:LO:R state by opposite end; And receive the PSC message of NR, remove the PSC message of LO to return to normal condition.
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| CN201410778184.4A CN104506428B (en) | 2014-12-15 | 2014-12-15 | Linear guard mode switching method, apparatus and system in MPLS TP |
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| CN201410778184.4A CN104506428B (en) | 2014-12-15 | 2014-12-15 | Linear guard mode switching method, apparatus and system in MPLS TP |
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| CN102571391A (en) * | 2010-12-22 | 2012-07-11 | 中兴通讯股份有限公司 | Method and system for status synchronization of protection switching protocol |
| US20120182861A1 (en) * | 2009-08-17 | 2012-07-19 | Xiaohua Ma | Method and means for state transition of ethernet linear protection switching |
| CN103580932A (en) * | 2013-11-26 | 2014-02-12 | 盛科网络（苏州）有限公司 | Status switching method and system based on Ethernet linear protection switching |
| US20140219080A1 (en) * | 2013-02-01 | 2014-08-07 | Electronics And Telecommunications Research Institute | Method and apparatus for interworking protection switching |
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| US20120182861A1 (en) * | 2009-08-17 | 2012-07-19 | Xiaohua Ma | Method and means for state transition of ethernet linear protection switching |
| CN102571391A (en) * | 2010-12-22 | 2012-07-11 | 中兴通讯股份有限公司 | Method and system for status synchronization of protection switching protocol |
| US20140219080A1 (en) * | 2013-02-01 | 2014-08-07 | Electronics And Telecommunications Research Institute | Method and apparatus for interworking protection switching |
| CN103580932A (en) * | 2013-11-26 | 2014-02-12 | 盛科网络（苏州）有限公司 | Status switching method and system based on Ethernet linear protection switching |
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Address after: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee after: RUIJIE NETWORKS Co.,Ltd. Address before: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee before: Beijing Star-Net Ruijie Networks Co.,Ltd. |