CN102611577A - LDP (Label Distribution Protocol) conversation-based method, device and system for protecting PWs (Pseudo Wires) - Google Patents
LDP (Label Distribution Protocol) conversation-based method, device and system for protecting PWs (Pseudo Wires) Download PDFInfo
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Abstract
The invention discloses an LDP (Label Distribution Protocol) conversation-based method, device and system for protecting PWs (Pseudo Wires). The device comprises a BFD (Bidirectional Forwarding Detection) configuration module, a BFD detection module and a PW management module. Wherein the BFD configuration module is used for configuring a BFD on an LDP conversation after the LDP conversation between the PWs is established; the BFD detection module is used for informing the PW management module when detecting that the LDP conversation fails; and the PW management module is used for configuring one or more working PWs on the LDP conversation, and then carrying out protection switching. The system comprises the device and a service management module. According to the method, the device and the system provided by the invention, consumed BFD resources can be effectively reduced, network configuration is simplified, system resources are saved, configuration complexity is reduced, interaction of BFD messages is reduced, and system processing property is improved.
Description
Technical field
The present invention relates to the data network communications technical field, be specifically related to a kind of pseudo-line (Pseudo Wire is called for short PW) and detect guard method, Apparatus and system based on tag distribution protocol (Label Distribute Protocol is called for short LDP) session.
Background technology
In today of network high-speed development, the network environment of Ethernet becomes increasingly complex, and on the one hand, Carrier Requirements reduces the complexity of network design, makes full use of the purpose that existing public resource reaches network upgrade and expansion; On the other hand, the business convergence speed of operator during to network failure is paid much attention to, and when any one node broke down, the adjacent node business switching time was less than 50ms, had become the threshold grade standard gradually.In order to guarantee the reliability of network, adopt BFD (Bidirectional ForwardingDetection, two-way forwarding detects) fault detection mechanism and active-standby path resist technology usually, to reduce the professional cutout time.
Two-way forwarding detects is a technical scheme that is used to detect communication link fails, and the BFD agreement has realized the detection of two internodal communication link fails and recovery.Through between two equipment, sending out detection messages mutually, find the fault of intermediate communication link timely, improve the speed of fault detect and recovery.
The protection of PW active-standby path is a kind of pseudo-line redundancy protecting technology; In order to guarantee the high reliability of network; Usually consider the realizing route back mechanism during network design, set up operating path (pseudo-line PW works) and protection path (protecting pseudo-line PW) in advance, when fault happens in operational; Customer flow is switched on the protection path apace, reduce traffic loss as much as possible.
At application number is in the Chinese patent of CN201010138406.8, has proposed a kind of guard method and system of VPLS.On provider edge equipment (PE), the two-way forwarding of opening pseudo-line PW detects the BFD function, and PE is according to the detected state of BFD, and the port of the place in circuit AC side that links to each other with customer edge (CE) is handled, and service traffics are operated on the normal circuit.Shorten the time of professional switching, reduced professional unavailable probability, improved the reliability of network.
At application number is in the Chinese patent of CN201110162924.8, has proposed a kind of pseudo-line service dual-homing protection processing method, Apparatus and system.On PE equipment, set up the protection group relation of pseudo-line service, pseudo-line of the work of confirming and the pseudo-line of protection.Under the situation that the srvice instance flow of setting up with the pseudo-line of working can't normally be transmitted; The pseudo-line of successful through consultation protection is transmitted the srvice instance flow; Guarantee the normal forwarding of srvice instance flow, reduced influence of network failure on service, improved the robustness of network.
In sum, along with the high speed development of Ethernet, operator to network design and the protection performance of handoffs require increasingly high.When simplifying network design, guarantee that again business switching time reaches other performance of 50ms level; This just need combine BFD detection technique and PW active-standby path resist technology; Utilize of the generation of BFD technology fast detecting to link failure; Notice PW redundancy protecting switches to the flow of work PW on the protection PW fast, reduces the professional cutout time.But traditional P W detection and guard method are as shown in Figure 1, set up LDP session SESSION1 between PE1 equipment and the PE2 equipment; Set up LDP session SESSION2 between PE1 equipment and the PE3 equipment.On session SESSION1, form PW1, PW2, PW3, on session SESSION2, form PW4, PW5, PW6, wherein; PW1, PW2, PW3 are the pseudo-line of work, and PW4, PW5, PW6 have formed PW1/PW4 for the pseudo-line of protection on PE1 equipment; PW2/PW5, the dual-homing protection relation of PW3/PW6.For session SESSION1, all PW (PW1, PW2, PW3) that are based upon in this session need dispose the BFD detection, can have following three problems like this:
First: the BFD quantity and the PW quantity of deployment are directly proportional, and PW quantity is many more, and BFD detects just many more, has consumed system resource;
Second: configuration is complicated, and each bar PW in the LDP session needs the BFD on this PW of manual configuration to detect, when PW quantity more for a long time, the configuration effort bulky complex that just seems;
The 3rd: when PW quantity more for a long time, will produce a large amount of BFD detection messages, cause CPU busy, the system handles performance reduces.
Summary of the invention
The technical issues that need to address of the present invention provide a kind of PW guard method, Apparatus and system based on the LDP session, can effectively reduce the BFD resource of consumption, simplify network design, reduce the mutual of BFD message, improve the handling property of system.
In order to solve the problems of the technologies described above, the invention provides a kind of pseudo-line guard method based on label distribution protocol conversation, comprising:
Set up the tag distribution protocol LDP session between the provider edge equipment PE;
Detect (BFD) in the two-way forwarding of said LDP session deploy;
The pseudo-line PW of configuration one or more work in said LDP session;
After said BFD detects said LDP session and breaks down, give all working in the said LDP session pseudo-line PW said fault delivery, protect switching then.
Further, when said LDP session deploy BFD, only on the local end PE of said LDP session, carry out the BFD configuration, the content of configuration comprises PE address, opposite end.
Further, said method also comprises:
On the local end PE all working PW in the same LDP session is being formed a LDP session PW group, all members in this LDP session PW group have identical PE address, opposite end;
After said BFD detects said LDP session and breaks down, give all working in the said LDP session pseudo-line PW said fault delivery, protect switching then, comprising:
After said BFD detects said LDP session and breaks down; Find corresponding LDP session PW group according to the PE address, opposite end of said LDP session; On said fault delivery each work PW in the said LDP session PW group; After the work PW perception fault, pseudo-line PW switches on the corresponding protection PW with all working.
Further, said method also comprises:
When increasing work PW newly in the said LDP session, this work PW that increases newly is added in the said LDP session PW group in the said LDP session.
Further, said method also comprises:
On the local end PE all working PW in the same LDP session is being formed a LDP session PW group, all members in this LDP session PW group have identical PE address, opposite end;
After said BFD detects said LDP session failure recovery, service traffics are returned on the work PW that switches to said LDP session, comprising:
After said BFD detects said LDP session failure recovery; Find corresponding LDP session PW group according to the PE address, opposite end of said LDP session; Fault recovery is delivered on each the work PW in the said LDP session PW group; After the said work PW perception fault recovery, service traffics are returned on all working PW that switches to said LDP session.
In order to solve the problems of the technologies described above, the present invention also provides a kind of pseudo-line protective device based on label distribution protocol conversation, comprising:
Two-way forwarding detects the BFD deployment module, is used for after the tag distribution protocol LDP session between the provider edge equipment PE is set up, at said LDP session deploy BFD;
Whether the BFD detection module is used to detect said LDP session and breaks down, and after detecting said LDP session and breaking down, notifies pseudo-line PW administration module;
The PW administration module is used for configuration one or more work PW in said LDP session; Also be used for after the notice of receiving said BFD detection module, give all working in the said LDP session pseudo-line PW said fault delivery, protect switching then.
Further, said BFD deployment module is only carried out the BFD configuration on the local end PE of said LDP session when said LDP session deploy BFD, and the content of configuration comprises PE address, opposite end.
Further, said PW administration module also is used on the local end PE all working PW in the same LDP session being formed a LDP session PW group, and all members in this LDP session PW group have identical PE address, opposite end;
The PW administration module also is used for after the notice of receiving said BFD detection module, gives all working in the said LDP session pseudo-line PW said fault delivery, protects switching then, comprising:
Said PW administration module finds corresponding LDP session PW group according to the PE address, opposite end of said LDP session; On said fault delivery each work PW in the said LDP session PW group; After the work PW perception fault, pseudo-line PW switches on the corresponding protection PW with all working.
Further, said PW administration module also is used for when increasing work PW newly in the said LDP session, and this work PW that increases newly is added in the said LDP session PW group in the said LDP session.
Further, said BFD detection module also is used for after detecting said LDP session failure recovery, notifying said PW administration module;
Said PW administration module also is used for after the notice of receiving said BFD detection module, and service traffics are returned on the work PW that switches to said LDP session.
Further, said PW administration module also is used on the local end PE all working PW in the same LDP session being formed a LDP session PW group, and all members in this LDP session PW group have identical PE address, opposite end;
Said PW administration module also is used for after the notice of receiving said BFD detection module, and service traffics are returned on the work PW that switches to said LDP session, comprising:
Said PW administration module finds corresponding LDP session PW group according to the PE address, opposite end of said LDP session; Fault recovery is delivered on each the work PW in the said LDP session PW group; After the said work PW perception fault recovery, service traffics are returned on all working PW that switches to said LDP session.
In order to solve the problems of the technologies described above, the present invention also provides a kind of pseudo-line protection system based on label distribution protocol conversation, comprising: aforesaid pseudo-line protective device and service management module based on label distribution protocol conversation.
Compared with prior art; PW guard method, Apparatus and system based on the LDP session provided by the invention; Can effectively reduce the BFD resource of consumption; Same LDP session just can realize the detection of all working PW in this LDP session through a BFD, and this being deployed in has only the mutual of a BFD message between the PE equipment of setting up the LDP session.Particularly at PW more for a long time, can the effective simplification network design, conserve system resources reduces the complexity of configuration, reduces the mutual of BFD message, improves the handling property of system.
Description of drawings
Fig. 1 is the sketch map that the PW in the LDP session disposes BFD in the prior art;
Fig. 2 is based on the structure chart of the PW protective device of LDP session among the embodiment;
Fig. 3 is based on the flow chart of the PW guard method of LDP session among the embodiment;
Fig. 4 is a LDP session deploy BFD sketch map among the embodiment;
Fig. 5 is based on the structure chart of the PW protection system of LDP session in the applying examples;
Fig. 6 is based on the flow chart of the PW guard method of LDP session in the applying examples.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
Embodiment:
As shown in Figure 2, present embodiment provides a kind of PW protective device based on the LDP session, comprising:
Two-way forwarding detects (BFD) deployment module, is used for after the tag distribution protocol LDP session between the Provider Edge PE equipment is set up, at said LDP session deploy BFD;
Wherein, when PW deploy BFD detects, need all carry out the BFD configuration in the prior art at the first node (this PE equipment) of PW and tail node (opposite end PE equipment), and in the present embodiment when LDP deploy BFD detects, need on the first node of PW, be configured; In addition, at PW deploy BFD, need on first node and tail node, specify PE address, opposite end and VCID (VirtualCircle ID respectively; The virtual circuit sign); Promptly the configuration content be PE address+VCID, and in the present embodiment when LDP deploy BFD, the content of configuration is PE address, opposite end.
Whether the BFD detection module is used to detect said LDP session and breaks down, and after detecting said LDP session and breaking down, notifies pseudo-line PW administration module;
The PW administration module is used for configuration one or more work PW in said LDP session; Also be used for after the notice of receiving said BFD detection module, give all working in the said LDP session pseudo-line PW said fault delivery, protect switching then.
Wherein, said PW administration module also is used on the local end PE all working PW in the same LDP session being formed a LDP session PW group, and all members in this LDP session PW group have identical PE address, opposite end; When increasing work PW newly in the said LDP session, this work PW that increases newly is added in the LDP session PW group in the said LDP session.
The PW administration module also is used for after the notice of receiving said BFD detection module, gives all working in the said LDP session pseudo-line PW said fault delivery, protects switching then, comprising:
Said PW administration module finds corresponding LDP session PW group according to the PE address, opposite end of said LDP session; On said fault delivery each work PW in the said LDP session PW group; After the work PW perception fault, pseudo-line PW switches on the corresponding protection PW with all working.
In addition, said BFD detection module also is used for after detecting said LDP session failure recovery, notifying said PW administration module;
Said PW administration module also is used for after the notice of receiving said BFD detection module, and service traffics are returned on the work PW that switches to said LDP session.
Wherein, Said PW administration module finds corresponding LDP session PW group according to the PE address, opposite end of said LDP session; Fault recovery is delivered on each the work PW in the said LDP session PW group; After the said work PW perception fault recovery, service traffics are returned on all working PW that switches to said LDP session.
As shown in Figure 3, present embodiment provides a kind of PW guard method based on the LDP session, may further comprise the steps:
S101: set up the tag distribution protocol LDP session between the PE;
S102: at said LDP session deploy BFD;
Wherein, when LDP deploy BFD, only need on the first node (this PE equipment) of PW, carry out the BFD configuration in the present embodiment; And the content of configuration comprises PE address, opposite end.
S103: the pseudo-line PW of configuration one or more work in said LDP session;
Wherein, in the present embodiment, on the local end PE all working PW in the same LDP session is being formed a LDP session PW group, all members in this LDP session PW group have identical PE address, opposite end;
When increasing work PW newly in the said LDP session; This work PW that increases newly is added in the LDP session PW group in the said LDP session; Like this; When the PE equipment room of setting up the LDP session increases PW newly, need not detect by extra again deployment BFD, this PW can be mapped in this LDP session through PE address, opposite end automatically.
S104: after said BFD detects said LDP session and breaks down, give all working in the said LDP session pseudo-line PW said fault delivery, protect switching then.
Wherein, In the specific implementation, as a kind of preferred mode, after said BFD detects said LDP session and breaks down; Find corresponding LDP session PW group according to the PE address, opposite end of said LDP session; On said fault delivery each work PW in the said LDP session PW group, after the work PW perception fault, pseudo-line PW switches on the corresponding protection PW with all working.
In addition, after step S104, after said BFD detects said LDP session failure recovery, service traffics are returned on the work PW that switches to said LDP session.
Wherein, In the specific implementation, as a kind of preferred mode, after said BFD detects said LDP session failure recovery; Find corresponding LDP session PW group according to the PE address, opposite end of said LDP session; Fault recovery is delivered on each the work PW in the said LDP session PW group, after the said work PW perception fault recovery, service traffics is returned on all working PW that switches to said LDP session.
In an applying examples, introduce networking application scenarios down earlier, be example with Fig. 4, this networking application scenarios is to detect at a LDP session deploy BFD, all PW in the LDP session is detected the network topology of protection.Be specially: dispose LDP session SESSION1 between PE1 and the PE2, dispose LDP session SESSION2 between PE1 and the PE3.Detect at SESSION1 deploy BFD.PE1 deploy VPWS is professional, sets up PW1, PW2, PW3 respectively, and three PW are the PW on the same LDP session SESSION1.Between PE1 and PE3, set up simultaneously PW4, PW5, PW6.Configuration PW protection group on PE1, and configuration protection strategy form PW1/PW4, PW2/PW5, the protection relation of PW3/PW6.
Below in conjunction with this application scenarios present embodiment is described in detail.
As shown in Figure 5; Should at PE1 equipment place the PW protection system based on the LDP session be provided also with example; Comprise: L2VPN (Layer 2 Virtual Private Network, two-layer virtual private network) service management module and above-mentioned PW protective device based on the LDP session
Wherein, L2VPN service management module realizes the L2VPN service deployment between the PE equipment, and a plurality of PW in the L2VPN business are carried out management maintenance;
The BFD deployment module is used for after the tag distribution protocol LDP session between the Provider Edge PE equipment is set up, at said LDP session deploy BFD;
Whether the BFD detection module is used for periodically sending detection messages, detect said LDP session and break down; In several cycles,, think that then the LDP session path breaks down if do not receive the BFD detection messages; After detecting said LDP session and breaking down, notice PW administration module;
The PW administration module is used for configuration one or more work PW in said LDP session; Also be used for after the notice of receiving said BFD detection module; The LDP session failure is bred on all working PW member in this LDP session; After the work PW perception fault; Work PW from said LDP session switches on the corresponding protection PW with service traffics, and after receiving the fault recovery notice, returns and cut processing.
As shown in Figure 6, should a kind of PW guard method based on the LDP session be provided with example, may further comprise the steps:
S201: between PE equipment, set up the LDP session;
That is, between PE1 and PE2, set up LDP session SESSION1, set up LDP session SESSION2 between PE1 and the PE3;
S202: detect at LDP session SESSION1 deploy BFD;
After disposing completion, BFD can realize the detection to LDP session SESSION1, and promptly BFD can perceive the generation and the disappearance of LDP session SESSION1 fault.
S203: dispose three PW (PW is a lot of in the real network deployment, and this sentences three PW is that example describes) of same LDP session, set up the VPWS srvice instance;
Specifically comprise:
Set up the VPWS1 business between S2031:PE1 and the PE2 equipment, on LDP session SESSION1, form PW1; Between PE1 and the PE3 equipment, on LDP session SESSION2, form PW4;
Set up the VPWS2 business between S2032:PE1 and the PE2 equipment, on LDP session SESSION1, form PW2; Between PE1 and the PE3 equipment, on LDP session SESSION2, form PW5;
Set up the VPWS3 business between S2033:PE1 and the PE2 equipment, on LDP session SESSION1, form PW3; Between PE1 and the PE3 equipment, on LDP session SESSION2, form PW6.
S204: on PE1, carry out the deployment of PW protection group, set up three protection groups, and the configuration protection strategy, form PW1/PW4, PW2/PW5, the protection relation of PW3/PW6;
The PW that wherein works is PW1, PW2, PW3; Protection PW is PW4, PW5, PW6;
S205: when the LDP conversation between PE1 and the PE2, BFD detects fault and takes place, and the BFD detection module can be given the PW administration module with signalling trouble;
After the S206:PW administration module is received the signalling trouble of BFD detection module, fault is bred on all the PW members on the LDP session SESSION1;
Like this, PW1, PW2, PW3 have perceived the detection failure of BFD;
The S207:PW administration module carries out the hand-off process of PW, and the service traffics of PW1 are switched on the protection PW4, and the service traffics of PW2 switch on the protection PW5, and the service traffics of PW3 switch on the protection PW6;
S208: the LDP session SESSION1 between PE1 and PE2 recovers just often, and BFD detects fault recovery, and the BFD detection module can be notified the administration module to PW with fault recovery;
The S209:PW administration module is received the fault recovery notice, and fault recovery is delivered on all the PW members on the LDP session SESSION1, and like this, PW1, PW2, PW3 have perceived the recovery of fault;
The S210:PW administration module carries out PW and returns and cut processing, flow is returned on the work PW that switches to separately, and the flow of PW4, PW5, PW6 returns respectively that to switch to work PW1, PW2, PW3 last.
So far, accomplished with regard to disposing based on the PW detection protection of LDP session.After BFD detects fault, can be with fault delivery each PW to the LDP session, PW itself needn't dispose BFD and detect and just can reach identical detection effect.The flow successful switch that final LDP session SESSION1 goes up all working PW is to the protection PW of correspondence.
Can find out that from the foregoing description with respect to prior art, the PW guard method based on the LDP session, the Apparatus and system that provide in the foregoing description are set up the LDP session at end-to-end PE equipment room, and detect at this session deploy BFD.When the PE equipment room of setting up the LDP session increases PW newly; Need not detect by extra again deployment BFD, this PW is mapped in this LDP session through PE address, opposite end automatically, after work PW perceives the path failure of BFD detection; Protect and switch, flow is switched on the protection PW.Can effectively reduce the BFD resource of consumption like this, same LDP session just can realize the detection of all working PW in this LDP session through a BFD, and this being deployed in has only the mutual of a BFD message between the PE equipment of setting up the LDP session.Particularly at PW more for a long time, can the effective simplification network design, conserve system resources reduces the complexity of configuration, reduces the mutual of BFD message, improves the handling property of system.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is merely the preferred embodiments of the present invention, is not to be used to limit protection scope of the present invention.According to summary of the invention of the present invention; Also other various embodiments can be arranged; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and are all within spirit of the present invention and principle; Any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. pseudo-line guard method based on label distribution protocol conversation comprises:
Set up the tag distribution protocol LDP session between the provider edge equipment PE;
Detect (BFD) in the two-way forwarding of said LDP session deploy;
The pseudo-line PW of configuration one or more work in said LDP session;
After said BFD detects said LDP session and breaks down, give all working in the said LDP session pseudo-line PW said fault delivery, protect switching then.
2. the method for claim 1 is characterized in that:
When said LDP session deploy BFD, only on the local end PE of said LDP session, carry out the BFD configuration, the content of configuration comprises PE address, opposite end.
3. the method for claim 1, it is characterized in that: said method also comprises:
On the local end PE all working PW in the same LDP session is being formed a LDP session PW group, all members in this LDP session PW group have identical PE address, opposite end;
After said BFD detects said LDP session and breaks down, give all working in the said LDP session pseudo-line PW said fault delivery, protect switching then, comprising:
After said BFD detects said LDP session and breaks down; Find corresponding LDP session PW group according to the PE address, opposite end of said LDP session; On said fault delivery each work PW in the said LDP session PW group; After the work PW perception fault, pseudo-line PW switches on the corresponding protection PW with all working.
4. method as claimed in claim 3 is characterized in that: said method also comprises:
When increasing work PW newly in the said LDP session, this work PW that increases newly is added in the said LDP session PW group in the said LDP session.
5. the method for claim 1, it is characterized in that: said method also comprises:
On the local end PE all working PW in the same LDP session is being formed a LDP session PW group, all members in this LDP session PW group have identical PE address, opposite end;
After said BFD detects said LDP session failure recovery, service traffics are returned on the work PW that switches to said LDP session, comprising:
After said BFD detects said LDP session failure recovery; Find corresponding LDP session PW group according to the PE address, opposite end of said LDP session; Fault recovery is delivered on each the work PW in the said LDP session PW group; After the said work PW perception fault recovery, service traffics are returned on all working PW that switches to said LDP session.
6. pseudo-line protective device based on label distribution protocol conversation comprises:
Two-way forwarding detects the BFD deployment module, is used for after the tag distribution protocol LDP session between the provider edge equipment PE is set up, at said LDP session deploy BFD;
Whether the BFD detection module is used to detect said LDP session and breaks down, and after detecting said LDP session and breaking down, notifies pseudo-line PW administration module;
The PW administration module is used for configuration one or more work PW in said LDP session; Also be used for after the notice of receiving said BFD detection module, give all working in the said LDP session pseudo-line PW said fault delivery, protect switching then.
7. device as claimed in claim 6 is characterized in that,
Said BFD deployment module is only carried out the BFD configuration on the local end PE of said LDP session when said LDP session deploy BFD, the content of configuration comprises PE address, opposite end.
8. device as claimed in claim 6 is characterized in that,
Said PW administration module also is used on the local end PE all working PW in the same LDP session being formed a LDP session PW group, and all members in this LDP session PW group have identical PE address, opposite end;
The PW administration module also is used for after the notice of receiving said BFD detection module, gives all working in the said LDP session pseudo-line PW said fault delivery, protects switching then, comprising:
Said PW administration module finds corresponding LDP session PW group according to the PE address, opposite end of said LDP session; On said fault delivery each work PW in the said LDP session PW group; After the work PW perception fault, pseudo-line PW switches on the corresponding protection PW with all working.
9. device as claimed in claim 8 is characterized in that,
Said PW administration module also is used for when increasing work PW newly in the said LDP session, and this work PW that increases newly is added in the said LDP session PW group in the said LDP session.
10. device as claimed in claim 6 is characterized in that,
Said BFD detection module also is used for after detecting said LDP session failure recovery, notifying said PW administration module;
Said PW administration module also is used for after the notice of receiving said BFD detection module, and service traffics are returned on the work PW that switches to said LDP session.
11. device as claimed in claim 10 is characterized in that,
Said PW administration module also is used on the local end PE all working PW in the same LDP session being formed a LDP session PW group, and all members in this LDP session PW group have identical PE address, opposite end;
Said PW administration module also is used for after the notice of receiving said BFD detection module, and service traffics are returned on the work PW that switches to said LDP session, comprising:
Said PW administration module finds corresponding LDP session PW group according to the PE address, opposite end of said LDP session; Fault recovery is delivered on each the work PW in the said LDP session PW group; After the said work PW perception fault recovery, service traffics are returned on all working PW that switches to said LDP session.
12. the pseudo-line protection system based on label distribution protocol conversation comprises: like described device of claim 6-11 and service management module.
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| CN105591891A (en) * | 2015-09-09 | 2016-05-18 | 杭州华三通信技术有限公司 | Pseudowire (PW) switching method and device |
| CN105656776A (en) * | 2014-12-01 | 2016-06-08 | 中兴通讯股份有限公司 | Pseudo-wire dual-homing protection switching system, method and device |
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