CN103516540B - A kind of looped network protection switching device and method - Google Patents
A kind of looped network protection switching device and method Download PDFInfo
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- CN103516540B CN103516540B CN201210220533.1A CN201210220533A CN103516540B CN 103516540 B CN103516540 B CN 103516540B CN 201210220533 A CN201210220533 A CN 201210220533A CN 103516540 B CN103516540 B CN 103516540B
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Abstract
The invention provides a kind of looped network protection switching device and method, wherein, the device includes：Relay protective scheme processing module, for obtaining the transmission information of the node where relay protective scheme processing module, and in the case where the work tunnel section where detecting node breaks down, judge whether that needs are switched, wherein, transport packet includes：It is used for the information of transmitting business stream before looped network where node carries out pretection switch and after pretection switch；Pretection switch execution module, after needing to be switched and received the transmission information for the node that relay protective scheme processing module is sent in the judgement of relay protective scheme processing module, node is switched according to transmission information.The present invention solves the problems, such as that the time in correlation technique needed for looped network protection switching is long, so as to effectively shorten the time needed for looped network protection switching, improves the efficiency of looped network protection switching.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of looped network protection switching device and method.
Background technology
The explosive growth of IPization business and emerging in multitude for data service so that with time division multiplexing（Time Division
Multiplex, referred to as TDM）Circuit switching is the SDH of kernel（Synchronous Digital
Hierarchy, referred to as SDH）Technology can not adapt to the demand of traffic packets transmission, point using IP packet switches as kernel
Group transmission net（Packet Transfer Network, referred to as PTN）Technology is arisen at the historic moment, and is successfully realized the system of full-service
One carrying and the fusion of network, form flexible, efficient and inexpensive packet delivery platform.Due to the recent bearer services of PTN
Importance and bearer service at a specified future date it is comprehensive, the reliability of PTN network seems abnormal important, and therefore, PTN network is protected
The research of mode is a job indispensable in PTN technical research.
PTN network protection includes linear protection and looped network protection, and linear protection is divided into path 1+1/1 again:1 linear protection,
SNCP（Sub-Network Connection Protection, referred to as SNCP）Deng looped network protection is then divided into list
Ring protection, the intersecting protection of ring, the tangent protection of ring etc..G.8132 the transport MPLS proposed（Transfer Multi-
Protocol Label Switching, referred to as T-MPLS）Network share protection ring has two kinds of wrapping and steering,
Wrapping protections refer to that each work tunnel configures a ring protection tunnel in opposite direction with it as protection road
Footpath, protection path and work tunnel share bandwidth, use identical physical pathway.In one direction, the path of protection path
The path direction of direction and work tunnel is opposite.On edge device, the corresponding protection group of protected node, set in centre
Standby upper, protected node corresponds to one or two protection groups, work tunnel that each protection group contains, protection path phase
Together, protect next-hop different.
As shown in figure 1, business is flowed into ring, the upper link point of Business Stream is A, and lower link point is D, its work tunnel
Be configured to A=>B=>C=>D, while configure a closed loop in opposite direction with it as protection path, i.e. A=>F=>E=>D=
>C=>B=>A.The label distribution of protection path must be associated with the label distribution of work tunnel, so that Business Stream can be based on
Label switched path（Label Switched Path, referred to as LSP）Protected down between work tunnel and protection path
Change.For example, as shown in figure 1, when the section layer between node B and node C breaks down, traditional reverse method is：Node C is examined
Measure and send automatic protection switching to node B after failure（Automatic Protection Switching, referred to as APS）Please
Ask, while change and business is received from Protection path；Node-B receiver is switched after being asked to APS, is changed from Protection path（Node B
Protection path between node A）Upper transmission business, LSP label are exchanged for protecting label P6, Business Stream edge by work tap W1
Protection ring reversely reaches node C；LSP label is exchanged for work tap W3 by node C by protection label P4, and Business Stream is by node C
Lower link point D is flow to go out.Finally, service path and LSP label, which are applied, is：A[W1]->B->B[P6]->A[P1]->F[P2]-
>E[P3]->D[P4]->C[W3]->D, this method although realize wrapping protection, but node C detect node B and
, it is necessary to APS requests be sent to node B, because APS messages transmit needs in a network when section layer between node C breaks down
Regular hour, cause to be switched within the short time that section layer breaks down, enter and be unable to realize switching time
Being switched fast within 50ms.
For it is at least one above-mentioned in correlation technique the problem of, not yet propose effective solution at present.
The content of the invention
The invention provides a kind of looped network protection switching device and method, is fallen with least solving looped network protection in correlation technique
Change the required time it is long the problem of.
According to an aspect of the invention, there is provided a kind of looped network protection switching device, it includes：Relay protective scheme handles mould
Block, for obtaining the transmission information of the node where relay protective scheme processing module, and the work tunnel where node is detected
In the case that section breaks down, judge whether that needs are switched, wherein, transport packet includes：Looped network where node is protected
It is used for the information of transmitting business stream before switching and after pretection switch；Pretection switch execution module, at relay protective scheme
After reason module judges that needs are switched and receive the transmission information of the node of relay protective scheme processing module transmission, according to biography
Defeated information is switched to node.
Preferably, above-mentioned looped network protection switching device also includes：Analysis of Policy Making module is protected, for the configuration according to node
The transmission information of information analysis node.
Preferably, relay protective scheme processing module includes：Detection unit, transmission information whether is configured with for detection node；
Determining unit, for judging to need the pretection switch for carrying out section layer, and in the case where detection node is configured with transmission information,
It is determined that node is switched.
Preferably, transport packet includes one below：It is used for the outgoing label of transmitting business stream before node switches and enters mark
Corresponding relation between label, and be used for the outgoing label of transmitting business stream after switching and enter the corresponding relation between label；Or
The variation relation of front and rear label action is switched in person's protection path.
Preferably, pretection switch execution module, it is additionally operable to receive the transmission letter for the node that relay protective scheme processing module is sent
Breath, and according to transmission information, by the outgoing label for being used for transmitting business stream before node switches and enter the corresponding relation between label
Replace with the outgoing label for being used for transmitting business stream after switching and enter the corresponding relation between label, or will be fallen in protection path
The switching motion for changing preceding label replaces with the pop-up action that protection path switches rear label.
Preferably, pretection switch execution module, it is additionally operable to the situation in the failure vanishes for detecting the appearance of work tunnel section
Under, the transmission information for the node that relay protective scheme processing module is sent is received, and transmitting business stream will be used for after node switches
Outgoing label and the corresponding relation entered between label replace with switch before be used for the outgoing label of transmitting business stream and enter between label
Corresponding relation, or the pop-up action that rear label is switched in protection path replaced with switch before label switching motion.
Preferably, transmission information also includes：Outgoing label in work tunnel section with protection path enter label it
Between mapping relations, wherein, protection path is one section of protection path corresponding with work tunnel section.
According to another aspect of the present invention, there is provided a kind of looped network protection switching method, it includes：In node in looped network
Relay protective scheme processing module obtain the transmission information of node, and work tunnel section where node is detected breaks down
In the case of, judge whether that needs are switched, wherein, transport packet includes：Before looped network where node carries out pretection switch and protect
It is used for the information of transmitting business stream after protective switching；Pretection switch execution module in node judges in relay protective scheme processing module
After the transmission information for needing to be switched and receiving the node that relay protective scheme processing module is sent, according to transmission information to section
Point is switched.
Preferably, it is above-mentioned before the relay protective scheme processing module in the node in looped network obtains the transmission information of node
Looped network protection switching method also includes：Biography of the Analysis of Policy Making module according to the configuration information analysis node of node is protected in node
Defeated information.
Preferably, in the case where the work tunnel section where detecting node breaks down, judge whether that needs are switched
Including：Whether relay protective scheme processing module detection node is configured with transmission information；Relay protective scheme processing module judge to need into
The pretection switch of row section layer, and in the case where detection node is configured with transmission information；It is determined that node is switched.
Preferably, transport packet includes one below：It is used for the outgoing label of transmitting business stream before node switches and enters mark
Corresponding relation between label, and be used for the outgoing label of transmitting business stream after switching and enter the corresponding relation between label；Or
The variation relation of front and rear label action is switched in protection path.
Preferably, the pretection switch execution module in node according to transmission information node is switched including：Protection is fallen
Change execution module and receive the transmission information for the node that relay protective scheme processing module is sent, and according to the transmission information of node, will save
Point, which switches the corresponding relation for being used for the outgoing label of transmitting business stream before and entering between label and replaces with to switch, to be used to transmit afterwards
The outgoing label of Business Stream and enter the corresponding relation between label, or the switching motion of label is replaced before being switched in protection path
The pop-up action of rear label is switched for protection path.
Preferably, it is above-mentioned after pretection switch execution module in node is switched according to transmission information to node
Looped network protection switching method also includes：Situation of the pretection switch execution module in the failure vanishes for detecting the appearance of work tunnel section
Under, the transmission information for the node that relay protective scheme processing module is sent is received, and transmitting business stream will be used for after node switches
Outgoing label and the corresponding relation entered between label replace with switch before be used for the outgoing label of transmitting business stream and enter between label
Corresponding relation, or the pop-up action that rear label is switched in protection path replaced with switch before label switching motion.
Preferably, transmission information also includes：Outgoing label in work tunnel section with protection path enter label it
Between mapping relations, wherein, protection path is one section of protection path corresponding with work tunnel section.
In the present invention, the relay protective scheme processing module in the node in looped network obtains the transmission information of the node in advance,
It is used for the information of transmitting business stream before looped network where the transmission information node carries out pretection switch and after pretection switch, when
When above-mentioned relay protective scheme processing module detects that the work tunnel section where above-mentioned node breaks down, judge whether the node needs
Switch, when above-mentioned relay protective scheme processing module judges that above-mentioned node needs to be switched, the transmission of above-mentioned node is believed
Breath is sent to the pretection switch execution module in above-mentioned node, and the pretection switch execution module is carried out according to transmission information to node
Switch, realize node and the failure situation of work tunnel section is detected by the relay protective scheme processing module in the node, and judge
Whether node, which needs, is switched, avoid other nodal tests to work tunnel section break down after, pass through handover request report
Text notifies phenomenon that above-mentioned node is switched, and then in reversed process, avoid transmitting needed for handover request message when
Between, so as to effectively shorten the time needed for looped network protection switching, improve the efficiency of looped network protection switching.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram according to the looped network protection switching of correlation technique；
Fig. 2 is the structured flowchart of looped network protection switching device according to embodiments of the present invention；
Fig. 3 is the structured flowchart of another looped network protection switching device according to embodiments of the present invention；
Fig. 4 is the structured flowchart of relay protective scheme processing module according to embodiments of the present invention；
Fig. 5 is the flow chart of looped network protection switching method according to embodiments of the present invention；
Fig. 6 is that looped network protection assembles the schematic diagram put under no switch status according to embodiments of the present invention；
Fig. 7 is the schematic diagram of A node switches after AB segment faults according to embodiments of the present invention；
Fig. 8 is the schematic diagram of A node switches after AD segment faults according to embodiments of the present invention；
Fig. 9 is the schematic diagram that B node is switched after BA segment faults according to embodiments of the present invention；
Figure 10 is the schematic diagram that B node is switched after BC segment faults according to embodiments of the present invention；
Figure 11 is the schematic diagram of D node switches after DA segment faults according to embodiments of the present invention；And
Figure 12 is the schematic diagram of D node switches after DC segment faults according to embodiments of the present invention.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
A kind of looped network protection switching device is present embodiments provided, as shown in Fig. 2 the looped network protection switching device includes：
Relay protective scheme processing module 202, for obtaining the transmission information of the node where relay protective scheme processing module, and detecting section
In the case that work tunnel section where point breaks down, judge whether that needs are switched, wherein, transport packet includes：Node institute
Looped network carry out pretection switch before and pretection switch after be used for transmitting business stream information；Pretection switch execution module
204, relay protective scheme processing module 202 is connected to, for judging that needs are switched and received in relay protective scheme processing module
After the transmission information for the node that relay protective scheme processing module is sent, node is switched according to transmission information.
Preferably, the function of above-mentioned relay protective scheme processing module 202 can realize that pretection switch is held by hardware chip
The function of row module 204 can also be realized by hardware chip.
In the above-described embodiments, the relay protective scheme processing module 202 in the node in looped network obtains the biography of the node in advance
Defeated information, it is used for transmitting business stream before the looped network where the transmission information node carries out pretection switch and after pretection switch
Information, when the work tunnel section where above-mentioned relay protective scheme processing module 202 detects above-mentioned node breaks down, judging should
Whether node, which needs, is switched, will be above-mentioned when above-mentioned relay protective scheme processing module 202 judges that above-mentioned node needs to be switched
The transmission information of node is sent to the pretection switch execution module 204 in above-mentioned node, the basis of pretection switch execution module 204
Transmission information is switched to node, is realized node and is detected work tunnel by the relay protective scheme processing module 202 in the node
The failure situation of road section, and whether decision node needs to be switched, and avoids other nodal tests and occurs to work tunnel section
After failure, the phenomenon that notifies above-mentioned node to be switched by handover request message, and then in reversed process, avoid transmitting
Time needed for handover request message, so as to effectively shorten the time needed for looped network protection switching, improve looped network protection and fall
The efficiency changed.
In order to rapidly, accurately obtain the transmission information of the node in looped network, in the preferred embodiment, such as Fig. 3 institutes
Show, above-mentioned looped network protection switching device also includes：Analysis of Policy Making module 206 is protected, for being analyzed according to the configuration information of node
The transmission information of node.
In above preferred embodiment, by the protection Analysis of Policy Making module in node come according to the configuration information of node point
Analyse the transmission information of node, it is preferable that in order to obtain the transmission information of node exactly, looped network protection model can be first established,
Further according to configuration information of the node in looped network protection model（For example, position of the node in looped network, the looped network protection on node
The information such as the protecting tunnel group in group, node）Analysis obtains the transmission information of each node, and protection Analysis of Policy Making module analysis goes out
Position of the node in the work tunnel associated by looped network protection group and looped network protection group, position of the node in work tunnel
Difference, for example, tunnel head node, the intermediate node for having the intermediate node of two protecting tunnel groups, having a protecting tunnel group, then
There is different switching actions respectively（Equivalent to above-mentioned transmission information）, by before the switching of the node analyzed and after switching
Enter outgoing label corresponding relation, relay protective scheme processing module 202 to hardware is respectively configured in label action, scheduling path etc. information.
The function of above-mentioned protection Analysis of Policy Making module can be realized by software, rapidly, to obtain exactly cautious
Transmission information.
In the case where certain section of work tunnel section breaks down, in order to exactly, effectively carry out node switches, this is excellent
Select in embodiment, as shown in figure 4, above-mentioned relay protective scheme processing module 202 includes：Detection unit 2022, it is for detection node
It is no to be configured with transmission information；Determining unit 2024, detection unit 2022 is connected to, for judging to need the protection for carrying out section layer
Switch, and in the case where detection node is configured with transmission information, it is determined that being switched to node.
In above preferred embodiment, the work where above-mentioned relay protective scheme processing module 202 detects above-mentioned node
In the case that tunnel construction sections break down, detection unit 2022 detects whether the node is configured with transmission information, it is of course also possible to first
Judge whether the node has looped network protection group, when judging sometimes, then judge whether the node is configured with transmission information, it is determined that single
First 2024 judge to need the pretection switch for carrying out section layer, and in the case where detection node is configured with transmission information, it is determined that pair
Node is switched, and in the case where the work tunnel section where above-mentioned node breaks down, judges that the node is exactly
No needs are switched, so as to improve the validity of looped network protection switching.
In order to improve the validity of looped network protection switching, accuracy, in the preferred embodiment, the transmission letter of above-mentioned node
Breath can comprise at least one below：It is used for the outgoing label of transmitting business stream before node switches and enters the corresponding pass between label
System, and be used for the outgoing label of transmitting business stream after switching and enter the corresponding relation between label；Or switched in protection path
The variation relation of front and rear label action.It is determined that outgoing label during node switches and after entering corresponding relation between label, or
After determining the variation relation that protection path switches front and rear label action, and then the path of transmitting business stream is determined, so as to improve
The validity of looped network protection switching, accuracy.
In order to improve the validity of looped network protection switching, accuracy, in the preferred embodiment, above-mentioned pretection switch performs
Module 204, is additionally operable to receive the transmission information for the node that relay protective scheme processing module is sent, and according to the transmission information of node,
The corresponding relation for being used for the outgoing label of transmitting business stream before node switches and entering between label is replaced with and is used for after switching
The outgoing label of transmitting business stream and enter the corresponding relation between label, or before being switched in protection path label switching motion
Replace with the pop-up action that protection path switches rear label.
In above preferred embodiment, pretection switch execution module 204 is according to transmission of the transmission information of node to node
The outgoing label of Business Stream and enter label and be replaced, to ensure the validity of node switches, accuracy.
In order to meet the needs of different application scene, the flexibility of the present embodiment is improved, it is in the preferred embodiment, above-mentioned
Pretection switch execution module 204, it is additionally operable in the case where detecting the failure vanishes that work tunnel section occurs, receives protection and patrol
The transmission information for the node that processing module is sent is collected, and by the outgoing label for being used for transmitting business stream after node switches and enters label
Between corresponding relation replace with switch before be used for transmitting business stream outgoing label and enter the corresponding relation between label, or
The pop-up action that rear label is switched in protection path is replaced with to the switching motion of label before switching.
After the failure vanishes in above-mentioned work tunnel section, quickly Business Stream can be carried out in above-mentioned work tunnel section
Transmission, in the preferred embodiment, above-mentioned transmission information can also include：Outgoing label in work tunnel section is with protecting
The mapping relations entered between label on tunnel, wherein, protection path is one section of protection path corresponding with work tunnel section.
In above preferred embodiment, above-mentioned work tunnel section is established（I.e. above-mentioned out of order work tunnel section）On go out
Label and the mapping relations entered between label in protection path, the protection path are one section corresponding with work tunnel section guarantor
Protect tunnel（With the protection path that above-mentioned work tunnel section is same looped network protection group）, so as to the event in above-mentioned work tunnel section
Hinder after disappearing, the state that any one node returns to before switching in advance in two nodes in above-mentioned work tunnel section
When, the transmission of Business Stream can be carried out by above-mentioned work tunnel, recovers normal so as to shorten above-mentioned work tunnel section
Time needed for transmission, can be quickly in above-mentioned work tunnel section after realizing the failure vanishes in above-mentioned work tunnel section
Carry out the transmission of Business Stream.
In the preferred embodiment, there is provided a kind of looped network protection switching method, as shown in figure 5, the looped network protection switching
Method includes step S502 to step S504.
Step S502：Relay protective scheme processing module in node in looped network obtains the transmission information of node, and is detecting
In the case of being broken down to the work tunnel section where node, judge whether that needs are switched, wherein, transport packet includes：Section
It is used for the information of transmitting business stream before looped network where point carries out pretection switch and after pretection switch.
Step S504：Pretection switch execution module in node judges that needs are switched simultaneously in relay protective scheme processing module
After the transmission information for receiving the node of relay protective scheme processing module transmission, node is switched according to transmission information.
By above-mentioned steps, the relay protective scheme processing module in the node in looped network obtains the transmission letter of the node in advance
Breath, the letter of transmitting business stream to be used for before the looped network where the transmission information node carries out pretection switch and after pretection switch
Breath, when the work tunnel section where above-mentioned relay protective scheme processing module detects above-mentioned node breaks down, judge the node
Whether need to switch, when above-mentioned relay protective scheme processing module judges that above-mentioned node needs to be switched, by above-mentioned node
Transmission information is sent to the pretection switch execution module in above-mentioned node, and the pretection switch execution module is according to transmission information to section
Point is switched, and realizes the failure situation that node detects work tunnel section by the relay protective scheme processing module in the node,
And whether decision node needs to be switched, avoid other nodal tests to work tunnel section break down after, pass through switching
Request message notifies phenomenon that above-mentioned node is switched, and then in reversed process, avoids transmitting handover request message institute
The time needed, so as to effectively shorten the time needed for looped network protection switching, improve the efficiency of looped network protection switching.
In order to rapidly, accurately obtain the transmission information of the node in looped network, in the preferred embodiment, in looped network
Node in relay protective scheme processing module obtain node transmission information before, above-mentioned looped network protection switching method also includes：
Transmission information of the Analysis of Policy Making module according to the configuration information analysis node of node is protected in node.
In the case where certain section of work tunnel section breaks down, in order to exactly, effectively carry out node switches, this is excellent
Select in embodiment, where detecting node work tunnel section break down in the case of, judge whether needs switch including：
Whether relay protective scheme processing module detection node is configured with transmission information；Relay protective scheme processing module is judged to need to carry out section layer
Pretection switch, and detection node be configured with transmission information in the case of, it is determined that being switched to node.
In order to improve the validity of looped network protection switching, accuracy, in the preferred embodiment, transmission information can be at least
Including one below：It is used for the outgoing label of transmitting business stream before node switches and enters the corresponding relation between label, and switches
It is used for the outgoing label of transmitting business stream afterwards and enters the corresponding relation between label；Or front and rear label is switched in protection path and is moved
The variation relation of work.
In order to improve the validity of looped network protection switching, accuracy, in the preferred embodiment, the pretection switch in node
Execution module according to transmission information node is switched including：Pretection switch execution module receives relay protective scheme processing module hair
The transmission information of the node sent, and according to the transmission information of node, the outgoing label of transmitting business stream will be used for before node switches
And the corresponding relation entered between label replaces with the outgoing label for being used for transmitting business stream after switching and enters the correspondence between label
Relation, or the switching motion that preceding label is switched in protection path is replaced with into the pop-up action that protection path switches rear label.
In order to meet the needs of different application scene, the flexibility of the present embodiment is improved, in the preferred embodiment, is being saved
After pretection switch execution module in point is switched according to transmission information to node, pretection switch execution module is detecting
In the case of the failure vanishes that work tunnel section occurs, the transmission information for the node that relay protective scheme processing module is sent is received, and
The corresponding relation for being used for the outgoing label of transmitting business stream after node switches and entering between label is replaced with and is used for before switching
The outgoing label of transmitting business stream and enter the corresponding relation between label, or the pop-up action for rear label being switched in protection path
Replace with the switching motion of label before switching.
After the failure vanishes in above-mentioned work tunnel section, quickly Business Stream can be carried out in above-mentioned work tunnel section
Transmission, in the preferred embodiment, above-mentioned transmission information can also include：Outgoing label in work tunnel section is with protecting
The mapping relations entered between label on tunnel, wherein, protection path is one section of protection path corresponding with work tunnel section.
Above-mentioned each preferred embodiment is described in detail below in conjunction with accompanying drawing.
For the content of above-mentioned each preferred embodiment is explained in more detail, in the preferred embodiment, for the ease of
Action when obtaining each node switches and not switching（Equivalent to above-mentioned transmission information）, can build looped network protection model is
Example, and be described by taking different nodes in work tunnel as an example.
For example, a looped network protection model can be established first, as shown in fig. 6, wherein, work tunnel Tunnel_1 is double
To tunnel, path B<->A<->D<->E, node B and node E are the head node of work tunnel, and node A and node D are work
Tunnel intermediate node；Protection path Tunnel_2 is closed-loop tunnel, is made up of node A, B, C, D, Tunnel_2 Tunnel_1
Protection path.Looped network protection, which assembles, to be put on node A, B, C, D, and protection group ID is PGID_1, under normal circumstances Tunnel_1
Label_100, Tunnel_2 is all used all to use Label_200 in each node in each node.
Node A PGID_1 protections group includes Section_A1 and Section_A2；
Node B PGID_1 protections group includes Section_B1 and Section_B2；
Node C PGID_1 protections group includes Section_C1 and Section_C2；
Node D PGID_1 protections group includes Section_D1 and Section_D2；
Tunnel_1 and Tunnel_2 protecting tunnel group on node A, B, D be present.
After the completion of above-mentioned looped network protection model construction, can by software come according to node in looped network protection group and work
Diverse location in tunnel, calculate action when analyzing each node switches and not switching.For example, for A nodes,
After section layer detection between node A, node B or between node A, node D is out of order, A nodes can all be switched, the event of AB sections
During barrier, the main switching action of A nodes is：Work tunnel Tunnel_1 enters label Label_100 between node A, node D
Outgoing label Label_100 between corresponding node A, node B is, it is necessary to replace with protection path Tunnel_2 in node A, node
Outgoing label Label_200 between D；Enter label Label_200s of the protection path Tunnel_2 between node A, node D is corresponded to
Node A, node B between outgoing label Label_200, it is necessary to replace with bid of the work tunnel between node A, node D
Sign Label_100；Meanwhile the traffic scheduling path of A nodes also correspondingly changes, traffic scheduling path is by work tunnel AD
Section enter->Work tunnel AB sections go out, and the work tunnel AD sections for being changed into present enter->Protection path AD sections go out；Traffic scheduling path by
Protection path AD sections enter->Protection path AB sections go out, and the protection path AD sections for being changed into present enter->Work tunnel AD sections go out.Certainly,
When the section layer failure between node A, node D, conversion similar to the above can also occur for node A label, scheduling path.
For D nodes, there is protecting tunnel group between node D, node A due to only having, so only node D, node A
Between section layer failure when, node D just has switching action.When being broken down between node D, node A, node D, node E
Between work tunnel Tunnel_1 the outgoing label Label_ entered corresponding to label Label_100 between node D, node A
100, it is necessary to replace with outgoing label Label_200 of the protection path between node D, node C；Guarantor between node D, node C
The tunnel Tunnel_2 outgoing label Label_200 entered corresponding to label Label_200 between node D, node A is protected, it is necessary to replace
It is changed to outgoing label Label_100 of the work tunnel between node D, node E；Meanwhile the traffic scheduling path of D nodes is also corresponding
Ground changes, and traffic scheduling path enters by work tunnel DE sections->Work tunnel DA sections go out, and are changed into present work tunnel DE
Section enter->Protection path DC sections go out；Traffic scheduling path enters by protection path DC sections->Protection path DA sections go out, and are changed into present
Protection path DC sections enter->Work tunnel DE sections go out.
For B node, just there is protecting tunnel group between node B, node A due to only having, so only node B, section
During section layer failure between point A, node B just has switching action.When the section layer between node B, node A breaks down, B sections
Enter label Label_200s of the point protection tunnel Tunnel_2 between node B, node C will be by original mark in the behavior of B node
Label exchange becomes label stripping；The PW of B node simultaneously（Pseudo-wire）Originally it is bundled in the work tunnel between node B, node A,
In the present protection path for needing to be bundled between node B, node C.
In the preferred embodiment, with the intermediate node A of work tunnel（The East and West direction Duan Zhongjun of the intermediate node is included
Protecting tunnel group）Exemplified by, in the case that the section layer between node A, node B breaks down, it is dynamic that switching for node A is described in detail
Make.As shown in fig. 7, after the section layer between node A, node B breaks down, software analysis node A can be used to be protected in looped network
Position in shield group obtains east orientation section or west is switched to section, and analyzes position of the A nodes in work tunnel, obtains
The switching action of A nodes.Compare Fig. 6 and Fig. 7 to understand.The switching action of A nodes includes：
Work tunnel Tunnel_1 between node A, node D enter node A corresponding to label Label_100, node B it
Between outgoing label Label_100, it is necessary to replace with outgoing label Label_s of the protection path Tunnel_2 between node A, node D
200；Protection path Tunnel_2 entering corresponding to label Label_200 between node A, node B between node A, node D
Outgoing label Label_200 works as Business Stream, it is necessary to replace with outgoing label Label_100 of the work tunnel between node A, node D
During using E nodes as ingress, by switching for above-mentioned A nodes, realize Business Stream in work tunnel by D nodes to A nodes, so
Afterwards, in protection path by A nodes to D nodes, by protection path again by D nodes to C nodes, B node；Work as Business Stream
During using B node as ingress, by switching for above-mentioned A nodes, Business Stream is in protection path by B node to C nodes, D nodes
Until A nodes, then, in work tunnel, by A nodes to D nodes and E nodes.
In addition, in order to which business is quickly got through in WTR, by protection path Tunnel_2 between node A, node B
Enter label Label_200, and outgoing label Label_100s of the work tunnel Tunnel_1 between node A, node B is established and reflected
Penetrate relation.Because after the failure vanishes that the section layer between node A, node B occurs, A nodes, B node understood timing and in the time
The state returned to during arrival before switching, due to the timing inconsistency of A nodes and B node in practice, it might have certain section
The state that point returns to before switching in advance, for example, B node shifts to an earlier date the state that A nodes are returned to before switching, Business Stream is with E
Node is ingress, by A nodes to D nodes, C nodes, B node and A nodes, passage path A42, in work in protection path
Make on tunnel, then by A nodes to B node, when realizing the state before arbitrary node returns to switching in advance, can protect
Card rapidly realizes Business Stream normal transmission.
The corresponding relation for entering label and outgoing label before and after A node switches can be respectively configured at the relay protective scheme to hardware
Manage module.
Before switching, traffic scheduling path corresponding to outgoing label Label_100 of the work tunnel between node A, node B
It is A1, after switching, the path is changed into A12；Before switching, outgoing label Label_ of the protection path between node A, node B
200 in the traffic scheduling path of A nodes be A3, and after switching, the path is changed into A32.Quickly lead to business simultaneously for WTR to increase newly
The outgoing label mapping relations that enter calculate traffic scheduling path A42.The traffic scheduling path for switching front and rear is respectively configured to hardware
Logical processing unit.
When the Logical processing unit of hardware detects that failure occurs, by the switching action Information encapsulation of software merit rating into disappearing
Breath message is sent to network processing unit, and network processing unit performs corresponding switching action after receiving.
After failure vanishes, action message when not switching of software merit rating is packaged into message packet by Logical processing unit
Network processing unit is sent to, network processing unit performs corresponding action after receiving.
In the preferred embodiment, with the intermediate node A of work tunnel（The East and West direction Duan Zhongjun of the intermediate node is included
Protecting tunnel group）Exemplified by, in the case that the section layer between node A, node D breaks down, it is dynamic that switching for node A is described in detail
Make.As shown in figure 8, after the section layer between node A, node D breaks down, software analysis node A can be used to be protected in looped network
Position in shield group obtains east orientation section or west is switched to section, and analyzes position of the A nodes in work tunnel, obtains
The switching action of A nodes.Compare Fig. 6 and Fig. 8 to understand.The switching action of A nodes includes：
Work tunnel Tunnel_1 between node A, node B enter node A corresponding to label Label_100, node D it
Between outgoing label Label_100, it is necessary to replace with outgoing label Label_s of the protection path Tunnel_2 between node A, node B
200；Protection path Tunnel_2 entering corresponding to label Label_200 between node A, node D between node A, node B
Outgoing label Label_200 is, it is necessary to replace with outgoing label Label_100 of the work tunnel between node A, node B；Meanwhile it is
Business can quickly be got through in WTR, protection path Tunnel_2 entered into label Label_ between node A, node D
200, and outgoing label Label_100s of the work tunnel Tunnel_1 between node A, node D establish mapping relations.It will can fall
Change it is front and rear enter label and outgoing label corresponding relation logical process to hardware is respectively configured.
Before switching generation, traffic scheduling corresponding to outgoing label Label_100 of the work tunnel between node A, node D
Path is A2, and after switching, the path is changed into A22；Before switching, outgoing label of the protection path between node A, node D
Label_200 is A4 in the traffic scheduling path of A nodes, and after switching, the path is changed into A42.Quickly lead to business simultaneously for WTR
And the newly-increased outgoing label mapping relations that enter calculate traffic scheduling path A32.The traffic scheduling path for switching front and rear is respectively configured
Logical processing unit to hardware.
When the Logical processing unit of hardware detects that failure occurs, by the switching action Information encapsulation of software merit rating into disappearing
Breath message is sent to network processing unit, and network processing unit performs corresponding switching action after receiving.
After failure vanishes, action message when not switching of software merit rating is packaged into message packet by Logical processing unit
Network processing unit is sent to, network processing unit performs corresponding action after receiving.
In the preferred embodiment, by taking the intermediate node B in work tunnel as an example, the section layer between node B, node A
In the case of failure, node B switching action is described in detail.As shown in figure 9, the section layer between node B, node A goes out
After existing failure, can be obtained using positions of the software analysis node B in looped network protection group east orientation section or it is western to section there occurs
Switch, and analyze position of the B node in work tunnel, obtain the switching action of B node.Compare Fig. 6 and Fig. 9 to understand.B node
Switching action include：
Before switching, PW（Pseudo-wire）It is bundled in the work tunnel between node A, node B sections, after switching, PW（It is pseudo-
Line）It is bundled in the protection path between node B, node C.Wherein, enter and be bundled in PW on LSP, go out to PW and be bundled in
Go out on LSP.The binding relationship for switching front and rear PW and LSP is respectively configured to the Logical processing unit to hardware.
Before switching, protection path in the behavior of B node is Tag switching in the label Label_200 that enters of B, C section, is switched
Afterwards, it is label ejection to enter label Label_200 in the behavior of B node.Enter label Label_200 behavior point before and after switching
The Logical processing unit of hardware is not allocated to.
In order to quickly get through business in WTR, protection path Tunnel_2 is entered into label between node A, node B
Label_200, and outgoing label Label_100s of the work tunnel Tunnel_1 between node A, node B establish mapping relations, will
This new mapping relations is allocated to the Logical processing unit of hardware.
Before switching, PW（Pseudo-wire）Outgoing label is B2 in the traffic scheduling path of B node, and after switching, the path is changed into
B22；Before switching, it is B1 that AC (access control) side, which goes out to the traffic scheduling path in B node,.After switching, AC (accesses control
System) side go out to traffic scheduling path switching when become B42, WTR quickly lead to business when become B12.It is simultaneously WTR
Quickly get through service computation traffic scheduling path B32.Traffic scheduling path before and after switching is respectively configured to the logic to hardware
Processing unit.
When the Logical processing unit of hardware detects that failure occurs, by the switching action information of software merit rating（Enter bid
Sign corresponding relation, traffic scheduling path, label action）It is packaged into message packet and is sent to network processing unit, network processing unit is received
Corresponding switching action is performed after.
After failure vanishes, Logical processing unit is by action message when not switching of software merit rating（Enter the corresponding pass of outgoing label
System, traffic scheduling path, label action）It is packaged into message format and is sent to network processing unit, network processing unit performs after receiving
Corresponding action.
In the preferred embodiment, by taking the intermediate node B in work tunnel as an example, the section layer between node B, node C
In the case of failure, node B switching action is described in detail.As shown in Figure 10, the section layer between node B, node C goes out
After existing failure, can be obtained using positions of the software analysis node B in looped network protection group east orientation section or it is western to section there occurs
Switch, and analyze position of the B node in work tunnel, obtain the switching action of B node.Compare Fig. 9 and Figure 10 to understand.Cause
For the path of the work tunnel of Business Stream is not related to the section layer between B node, C nodes, and B node does not have switching action, therefore
It need not configure.
In the preferred embodiment, with the intermediate node D of work tunnel（The intermediate node only has a section to include tunnel
Protection group）Exemplified by, in the case that the section layer between node D, node A breaks down, node D switching action is described in detail.
As shown in figure 11, after the section layer between node D, node A breaks down, software analysis node D can be used in looped network protection
Position in group obtains east orientation section or west is switched to section, and analyzes position of the D nodes in work tunnel, obtains D
The switching action of node.Compare Fig. 6 and Figure 11 to understand.The switching action of D nodes includes：
Protection path Tunnel_2 between node D, node C enter node D corresponding to label Label_200, node A it
Between outgoing label Label_200, it is necessary to replace with outgoing label Label_s of the work tunnel Tunnel_1 between node D, node E
100；Work tunnel Tunnel_1 entering corresponding to label Label_100 between node A, node D between node D, node E
Outgoing label Label_100 is, it is necessary to replace with outgoing label Label_200 of the protection path between node D, node C；Meanwhile it is
Business can quickly be got through in WTR, protection path Tunnel_2 entered into label Label_ between node D, node A
200, and outgoing label Label_100s of the work tunnel Tunnel_1 between node D, node A establish mapping relations.Before switching
Logical process to hardware is respectively configured in the corresponding relation for entering label and outgoing label afterwards.
Before switching, work tunnel is in node D, node A sides outgoing label Label_100 in the traffic scheduling path of D nodes
It is D1, after switching, the path is changed into D12；Before switching, work tunnel exists in node D, node E sides outgoing label Label_100
The traffic scheduling path of D nodes is D2, and after switching, the path is changed into D22；Business quickly to be got through for WTR newly-increased one simultaneously
Traffic scheduling path D42, the traffic scheduling path before and after switching is respectively configured to the Logical processing unit to hardware.
When the Logical processing unit of hardware detects that failure occurs, by the switching action information of software merit rating（Enter bid
Sign corresponding relation, traffic scheduling path）It is packaged into message format and is sent to network processing unit, network processing unit performs phase after receiving
The action answered.
After failure vanishes, Logical processing unit is by action message when not switching of software merit rating（It is corresponding to enter outgoing label
Relation, traffic scheduling path）It is packaged into message packet and is sent to network processing unit, network processing unit performs corresponding dynamic after receives
Make.
In the preferred embodiment, by taking the intermediate node D in work tunnel as an example, the section layer between node D, node C
In the case of failure, node D switching action is described in detail.As shown in figure 12, the section layer between node D, node C goes out
After existing failure, can be obtained using positions of the software analysis node D in looped network protection group east orientation section or it is western to section there occurs
Switch, and analyze position of the D nodes in work tunnel, obtain the switching action of D nodes.Compare Figure 11 and Figure 12 to understand.Cause
For the path of the work tunnel of Business Stream is not related to the section layer between D nodes, C nodes, and D nodes do not have switching action, therefore
It need not configure.
As can be seen from the above description, the present invention realizes following technique effect：The protection in node in looped network
Logic processing module obtains the transmission information of the node in advance, and the looped network where the transmission information node is carried out before pretection switch
It is used for the information of transmitting business stream afterwards with pretection switch, where above-mentioned relay protective scheme processing module detects above-mentioned node
Work tunnel section break down when, judge whether the node needs to switch, when above-mentioned relay protective scheme processing module judge it is above-mentioned
Node is needed when being switched, the pretection switch execution module transmission information of above-mentioned node being sent in above-mentioned node, this
Pretection switch execution module according to transmission information node is switched, realize node by the relay protective scheme in the node at
The failure situation of module detection work tunnel section is managed, and whether decision node needs to be switched, and avoids other nodal tests
After being broken down to work tunnel section, the phenomenon that notifies above-mentioned node to be switched by handover request message, and then falling
During changing, avoid transmitting the time needed for handover request message, so as to effectively shorten the time needed for looped network protection switching,
Improve the efficiency of looped network protection switching.In addition, the protection Analysis of Policy Making module of each node analyzes the guarantor in advance in looped network
The switching action of node where protecting Analysis of Policy Making module（Equivalent to above-mentioned transmission information）, by protecting Analysis of Policy Making module can be with
Exactly, the transmission information of node is rapidly obtained.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored
Performed in the storage device by computing device, and in some cases, can be with different from shown in order execution herein
The step of going out or describing, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (12)
- A kind of 1. looped network protection switching device, it is characterised in that including：Relay protective scheme processing module, for obtaining the transmission information of the node where the relay protective scheme processing module, and examining In the case that work tunnel section where measuring the node breaks down, judge whether that needs are switched, wherein, the transmission letter Breath includes：It is used for the information of transmitting business stream before looped network where the node carries out pretection switch and after pretection switch；Pretection switch execution module, for judging that needs are switched and receive the guarantor in the relay protective scheme processing module Protect after the transmission information for the node that logic processing module is sent, the node is fallen according to the transmission information Change；Wherein, the transport packet includes one below：It is used for the outgoing label of transmitting business stream before the node switches and enters Corresponding relation between label, and be used to correspond to pass between transmitting the outgoing label of the Business Stream and entering label after switching System；Or the variation relation of front and rear label action is switched in protection path.
- 2. device according to claim 1, it is characterised in that also include：Analysis of Policy Making module is protected, for analyzing the transmission information of the node according to the configuration information of the node.
- 3. device according to claim 1 or 2, it is characterised in that the relay protective scheme processing module includes：Detection unit, for detecting whether the node is configured with the transmission information；Determining unit, for judging to need the pretection switch for carrying out section layer, and the transmission is configured with detecting the node In the case of information, it is determined that being switched to the node.
- 4. device according to claim 1 or 2, it is characterised in that the pretection switch execution module, be additionally operable to receive institute The transmission information of the node of relay protective scheme processing module transmission is stated, and according to the transmission information, by the node switches Replaced with before for the outgoing label of transmitting business stream and the corresponding relation that enters between label and be used to transmit the industry after switching Be engaged in stream outgoing label and enter the corresponding relation between label, or by the protection path switch before label switching motion replace The pop-up action of rear label is switched for the protection path.
- 5. device according to claim 1 or 2, it is characterised in that the pretection switch execution module, be additionally operable to detecting In the case of the failure vanishes occurred to the work tunnel section, the node that the relay protective scheme processing module is sent is received Transmission information, and by the outgoing label for being used for transmitting business stream after the node switches and enter the corresponding relation between label and replace It is changed to before switching and is used to transmit the outgoing label of the Business Stream and enters the corresponding relation between label, or by the protection tunnel The pop-up action that rear label is switched on road replaces with the switching motion for switching preceding label.
- 6. device according to claim 1 or 2, it is characterised in that the transmission information also includes：In the work tunnel Outgoing label in section and the mapping relations entered between label in protection path, wherein, the protection path is and the work Make one section of protection path corresponding to tunnel construction sections.
- A kind of 7. looped network protection switching method, it is characterised in that including：Relay protective scheme processing module in node in looped network obtains the transmission information of the node, and is detecting the node In the case that the work tunnel section at place breaks down, judge whether that needs are switched, wherein, the transport packet includes：It is described It is used for the information of transmitting business stream before looped network where node carries out pretection switch and after pretection switch；Pretection switch execution module in the node judges that needs are switched and received in the relay protective scheme processing module After the transmission information of the node sent to the relay protective scheme processing module, according to the transmission information to the node Switched；Wherein, the transport packet includes one below：It is used for the outgoing label of transmitting business stream before the node switches and enters Corresponding relation between label, and be used to correspond to pass between transmitting the outgoing label of the Business Stream and entering label after switching System；Or the variation relation of front and rear label action is switched in protection path.
- 8. according to the method for claim 7, it is characterised in that the relay protective scheme processing mould in the node in the looped network Before block obtains the transmission information of the node, in addition to:Protection Analysis of Policy Making module in the node analyzes the transmission information of the node according to the configuration information of the node.
- 9. the method according to claim 7 or 8, it is characterised in that the work tunnel section where the node is detected In the case of failure, judge whether needs switch including：The relay protective scheme processing module detects whether the node is configured with the transmission information；The relay protective scheme processing module is judged to need the pretection switch for carrying out section layer, and is detecting the node configuration In the case of stating transmission information, it is determined that being switched to the node.
- 10. the method according to claim 7 or 8, it is characterised in that pretection switch execution module in the node according to It is described transmission information the node is switched including：The pretection switch execution module receives the transmission information for the node that the relay protective scheme processing module is sent, and root According to the transmission information of the node, by the outgoing label for being used for transmitting business stream before the node switches and enter pair between label Should be related to replace with switch after be used to transmit the outgoing label of the Business Stream and enter the corresponding relation between label, or by institute State protection path and switch the switching motion of preceding label and replace with the pop-up action that the protection path switches rear label.
- 11. according to the method for claim 10, it is characterised in that pretection switch execution module in the node according to After the transmission information is switched to the node, in addition to：The pretection switch execution module is in the case where detecting the failure vanishes that the work tunnel section occurs, described in reception The transmission information for the node that relay protective scheme processing module is sent, and transmitting business stream will be used for after the node switches Outgoing label and the corresponding relation entered between label, which replace with to switch, to be used to transmit the outgoing label of the Business Stream before and enters label Between corresponding relation, or by the protection path switch rear label pop-up action replace with switch before the exchange of label move Make.
- 12. the method according to claim 7 or 8, it is characterised in that the transmission information also includes：In the work tunnel Outgoing label in road section and the mapping relations entered between label in protection path, wherein, the protection path be with it is described One section of protection path corresponding to work tunnel section.
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| EP2312792A1 (en) * | 2008-07-22 | 2011-04-20 | ZTE Corporation | Protection protocol device for network node and method for processing protection switching thereof |
| CN101877665A (en) * | 2009-04-29 | 2010-11-03 | 华为技术有限公司 | Ring network protecting method, network node and ring network |
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