CN106301813A - Detection method and device end to end in P2MP-TE multicast network - Google Patents
Detection method and device end to end in P2MP-TE multicast network Download PDFInfo
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- CN106301813A CN106301813A CN201510295539.9A CN201510295539A CN106301813A CN 106301813 A CN106301813 A CN 106301813A CN 201510295539 A CN201510295539 A CN 201510295539A CN 106301813 A CN106301813 A CN 106301813A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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Abstract
The invention discloses in a kind of P2MP-TE multicast network detection method and device end to end, described method includes: along the physical pathway of P2MP-TE each subtab switching path, set up each subtab switching path P2P bidirectional unicast tunnel one to one with P2MP-TE；Set up clean culture two-way converting detection BFD for each described P2P bidirectional unicast tunnel, detect with the link that each subtab switching path to P2MP-TE is corresponding.The method of the invention need not additionally P2MP-TE be developed multicast BFD function, and the existing clean culture BFD of multiplexing also uses bidirectional tunnel, it is achieved that maximally utilizes existing BFD and realizes the connectedness of detection P2MP-TE LSP.
Description
Technical field
The present invention relates to data network communications field, particularly relate to a kind of P2MP-TE (Point 2 Multiple
Point Traffic Engineering, point-to-multipoint traffic engineering) in multicast network end to end detection method and
Device.
Background technology
In P2MP-TE multicast network, the P2MP-TE that existing RFC describes only supports link FRR
(the quick heavy-route of Fast ReRoute) is protected, as long as so having link BFD (Bidirectional
Forwarding Detection, two-way converting detect) detection be sufficient for support.But link FRR protects nothing
Method protection equipment complete machine node, if certain node complete machine is restarted, then now protection will be lost efficacy, and
It is the highest that the FRR of link disposes difficulty.It is desirable that the end-to-end protection for P2MP-TE can be introduced.
If but end-to-end protection to be realized, it is desirable to the most quickly detect.?
Draft-ietf-bfd-multipoint-04.txt describes the BFD detection scheme of a kind of multicast network, but the party
Case first has to existing BFD is carried out protocol extension, it is achieved complexity is high.Visible, existing detection scheme exists
Not enough.So, how can maximally utilize existing BFD and realize detection P2MP-TE LSP (Label Switch
Path, label switched path) connectedness, become the technical problem to be solved.
Summary of the invention
In view of the above problems, it is proposed that the present invention is to provide a kind of P2MP-TE multicast solving the problems referred to above
Detection method and device end to end in network.
According to one aspect of the present invention, it is provided that detection method end to end in a kind of P2MP-TE multicast network,
Including:
Along the physical pathway of P2MP-TE each subtab switching path, set up and each subtab of P2MP-TE
Switching path P2P bidirectional unicast tunnel one to one；
Clean culture two-way converting detection BFD is set up, with to P2MP-TE for each described P2P bidirectional unicast tunnel
Link corresponding to each subtab switching path detect.
Alternatively, in the method for the invention, the explicit routing in each described P2P bidirectional unicast tunnel of foundation
Object carries out path computing generation with reference to the record routing object of corresponding subtab switching path.
Alternatively, in the method for the invention, described foundation and each subtab switching path one of P2MP-TE
The P2P bidirectional unicast tunnel of one correspondence, including:
Obtain the record routing object of each subtab switching path of P2MP-TE；
According to record routing object, determine the physical pathway information of corresponding subtab switching path；
Corresponding P2P bidirectional unicast tunnel is set up according to described physical pathway information.
Alternatively, in the method for the invention, described each subtab switching path to P2MP-TE is corresponding
Link detects, including:
Detect the clean culture BFD session in each P2P bidirectional unicast tunnel；
When the clean culture BFD session call drop in certain P2P bidirectional unicast tunnel, it is determined that occur clean culture BFD to fall
The link failure of the P2MP-TE subtab switching path corresponding to P2P bidirectional unicast tunnel of words.
Alternatively, the method for the invention also includes:
When link failure corresponding to certain subtab switching path being detected, notice P2MP-TE tunnel is corresponding
Subtab switching path carries out protection switching.
According to another aspect of the present invention, it is provided that a kind of P2MP-TE multicast network detects dress end to end
Put, including:
Module is set up in tunnel, for along the physical pathway of P2MP-TE each subtab switching path, set up with
P2MP-TE each subtab switching path P2P bidirectional unicast tunnel one to one；
Detection module, for setting up clean culture two-way converting detection BFD for each described P2P bidirectional unicast tunnel,
Detect with the link that each subtab switching path to P2MP-TE is corresponding.
Alternatively, in device of the present invention, each P2P bidirectional unicast tunnel that module is set up is set up in described tunnel
The route display object in road carries out path computing product with reference to the record routing object of corresponding subtab switching path
Raw.
Alternatively, in device of the present invention, module is set up in described tunnel, specifically for obtaining P2MP-TE
The record routing object of each subtab switching path, according to record routing object, determine that corresponding subtab is handed over
Change the physical pathway information in path；Corresponding P2P bidirectional unicast tunnel is set up according to described physical pathway information.
Alternatively, in device of the present invention, described detection module, specifically for the detection two-way list of each P2P
Broadcast the clean culture BFD session in tunnel；When the clean culture BFD session call drop in certain P2P bidirectional unicast tunnel,
Judge the P2MP-TE subtab switching path that the P2P bidirectional unicast tunnel of generation clean culture BFD call drop is corresponding
Link failure.
Alternatively, in device of the present invention, described detection module, it is additionally operable to when detecting that certain subtab is handed over
When changing link failure corresponding to path, the subtab switching path that notice P2MP-TE tunnel is corresponding is protected
Switching.
The present invention has the beneficial effect that:
Scheme of the present invention, by along each Sub-LSP in P2MP-TE tunnel (subtab switching path)
P2P bidirectional unicast tunnel is set up in path, and sets up BFD detection, it is achieved that to P2MP-TE's
Sub-LSP being associated property link detecting, the end-to-end protection for P2MP-TE lays detection basis.
Scheme of the present invention need not additionally P2MP-TE be developed multicast BFD function, and multiplexing is single
Broadcast BFD and use bidirectional tunnel, it is achieved that maximally utilizing existing BFD and realize detection P2MP-TE LSP
Connectedness.It addition, use bidirectional tunnel to also avoid the uncontrollability in BFD Hui Bao path.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, retouch below
Accompanying drawing in stating is only some embodiments of the present invention, for those of ordinary skill in the art, not
On the premise of paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The flow process of detection method end to end in a kind of P2MP-TE multicast network that Fig. 1 provides for the present invention
Figure；
The concrete application example figure of the detection method that Fig. 2 provides for the present invention；
A kind of P2MP-TE multicast network that Fig. 3 provides for the present invention detects the structural frames of device end to end
Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
Embodiment one
The embodiment of the present invention provides in a kind of P2MP-TE multicast network detection method end to end, such as Fig. 1 institute
Showing, described method specifically includes:
Step S101, along the physical pathway of P2MP-TE each subtab switching path, sets up and P2MP-TE
Each subtab switching path P2P bidirectional unicast tunnel one to one；
Preferably, this step specific implementation is as follows:
(1) the record routing object of each subtab switching path of P2MP-TE is obtained；
(2) according to record routing object, the physical pathway information of corresponding subtab switching path is determined；
(3) corresponding P2P bidirectional unicast tunnel is set up according to described physical pathway information.
It is to say, the route display object in each P2P bidirectional unicast tunnel set up is with reference to corresponding subtab
The record routing object of switching path carries out path computing generation.
Step S102, sets up clean culture BFD for each P2P bidirectional unicast tunnel, with each son to P2MP-TE
The link that label switched path is corresponding detects.
In this step, the link that each subtab switching path of P2MP-TE is corresponding is detected, specifically wraps
Include: detect the clean culture BFD session in each P2P bidirectional unicast tunnel, when the list in certain P2P bidirectional unicast tunnel
When broadcasting BFD session call drop, it is determined that the P2P bidirectional unicast tunnel that clean culture BFD call drop occurs is corresponding
The link failure of P2MP-TE subtab switching path.
Further, method described in the embodiment of the present invention also includes: when certain subtab switching path pair being detected
During the link failure answered, the link sending corresponding subtab switching path to the tunnel of P2MP-TE is faulty
Notification message so that the tunnel trigger protection switching of P2MP-TE.
In summary, the present invention is two-way by setting up P2P along each Sub-LSP path, P2MP-TE tunnel
Single tunnel, and set up BFD detection, and then Sub-LSP the being associated property link to P2MP-TE
Detection, the end-to-end protection for P2MP-TE lays detection basis.
Embodiment two
The embodiment of the present invention is by disclosing more details, in the P2MP-TE multicast network provide the present invention
Detection method is illustrated end to end, concrete:
The LSP of P2MP-TE can be subdivided into the Sub Lsp of each tail (afterbody node).
The tunnel source node of P2MP-TE is RRO (Record Route Object, the note of each Sub Lsp
Record routing object) it is supplied to P2P-TE (Point 2Point Traffic Engineering, point-to-point flow work
Journey) management assembly.Initiated bidirectional unicast tunnel by P2P-TE to set up.Set up and use P2MP Sub Lsp
RRO as constrained path, carry out path computing, produce ERO (the Explicit Route in P2P tunnel
Object, explicit route object).Use the mapping relations one by one in P2P tunnel and Sub Lsp, thus protect
Demonstrate,prove P2P bidirectional unicast tunnel path completely the same with Sub Lsp path, P2MP tunnel.
Setting up clean culture BFD for each P2P bidirectional unicast tunnel, be bidirectional tunnel due to set up, BFD returns
Bag also transmits along tunnel, this ensures that theres the consistent of BFD transmitting-receiving bag path.In P2P bidirectional unicast tunnel
After the session down of BFD, the detection of notice P2MP tunnel correspondence Sub Lsp is abnormal, and then triggers
Protection switching, thus play the quick detection effect to P2MP tunnel Sub Lsp.
As in figure 2 it is shown, for a concrete application example of method described in the embodiment of the present invention, with reference to Fig. 2, two
Bar Sub LSP1, Sub LSP2, build to node R 4, R5 from node R 1, along Sub LSP1 and Sub respectively
LSP2 sets up two bidirectional unicast P2P tunnel1 and P2P tunnel2 respectively, after tunnel is successfully established,
Clean culture BFD is set up respectively at P2P tunnel1 and P2P tunnel2, if the link event between R4 and R5
Barrier, then the BFD session down of P2P tunnel2, the Sub Lsp2 triggering R1 node carries out end-to-end
Protection switching；If link failure between R3 and R4, then P2P tunnel1 and the BFD of P2P tunnel2
Session down, the Sub LSP1 and Sub LSP2 of notice R1 node P2MP-TE carry out end respectively and arrive
End protection switching.
Embodiment three
The embodiment of the present invention provides in a kind of P2MP-TE multicast network and detects device end to end, such as Fig. 3 institute
Show, specifically include:
Module 310 is set up in tunnel, for the physical pathway along P2MP-TE each subtab switching path, builds
Vertical each subtab switching path P2P bidirectional unicast tunnel one to one with P2MP-TE；
Detection module 320, for setting up the detection of clean culture two-way converting for each described P2P bidirectional unicast tunnel
BFD, detects with the link that each subtab switching path to P2MP-TE is corresponding.
Based on said structure framework and implement principle, under the above constitution several concrete and preferably is given below
Embodiment, in order to refine and to optimize the function of device of the present invention, so that the enforcement of the present invention program is more
Convenient, accurately.It should be noted that in the case of not conflicting, following feature can be in any combination.
In the embodiment of the present invention, the display road in each P2P bidirectional unicast tunnel that module 310 is set up is set up in tunnel
Path computing generation is carried out by the record routing object of the corresponding subtab switching path of object reference.
Further, in the embodiment of the present invention, module 310 is set up in tunnel, specifically for obtaining P2MP-TE
The record routing object of each subtab switching path, according to record routing object, determine that corresponding subtab is handed over
Change the physical pathway information in path；Corresponding P2P bidirectional unicast tunnel is set up according to described physical pathway information.
Further, in the embodiment of the present invention, detection module 320, specifically for detecting each P2P bidirectional unicast
The clean culture BFD session in tunnel；When the clean culture BFD session call drop in certain P2P bidirectional unicast tunnel, sentence
Surely the P2MP-TE subtab switching path that the P2P bidirectional unicast tunnel of generation clean culture BFD call drop is corresponding
Link failure.
Further, in the embodiment of the present invention, described detection module, it is additionally operable to when detecting that certain subtab is handed over
When changing link failure corresponding to path, the subtab switching path that notice P2MP-TE tunnel is corresponding is protected
Switching.
Further, device described in the embodiment of the present invention is applied in P2P TE.
In summary, the embodiment of the present invention is by setting up P2P along each Sub-LSP path, P2MP-TE tunnel
Bidirectional unicast tunnel, and set up BFD detection, and then the being associated property of Sub-LSP to P2MP-TE
Link detecting, the end-to-end protection for P2MP-TE lays detection basis.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a detection method end to end in point-to-multipoint traffic engineering P2MP-TE multicast network, it is special
Levy and be, including:
Along the physical pathway of P2MP-TE each subtab switching path, set up and each subtab of P2MP-TE
Switching path P2P bidirectional unicast tunnel one to one；
Clean culture two-way converting detection BFD is set up, with to P2MP-TE for each described P2P bidirectional unicast tunnel
Link corresponding to each subtab switching path detect.
2. the method for claim 1, it is characterised in that each described P2P bidirectional unicast tunnel of foundation
The route display object in road carries out path computing product with reference to the record routing object of corresponding subtab switching path
Raw.
3. method as claimed in claim 2, it is characterised in that described foundation and each son of P2MP-TE
Label switched path P2P bidirectional unicast tunnel one to one, including:
Obtain the record routing object of each subtab switching path of P2MP-TE；
According to record routing object, determine the physical pathway information of corresponding subtab switching path；
Corresponding P2P bidirectional unicast tunnel is set up according to described physical pathway information.
4. the method for claim 1, it is characterised in that described each subtab to P2MP-TE
The link that switching path is corresponding detects, including:
Detect the clean culture BFD session in each P2P bidirectional unicast tunnel；
When the clean culture BFD session call drop in certain P2P bidirectional unicast tunnel, it is determined that occur clean culture BFD to fall
The link failure of the P2MP-TE subtab switching path corresponding to P2P bidirectional unicast tunnel of words.
5. the method as described in Claims 1-4 any one, it is characterised in that described method also includes:
When link failure corresponding to certain subtab switching path being detected, notice P2MP-TE tunnel is corresponding
Subtab switching path carries out protection switching.
6. a P2MP-TE multicast network detects device end to end, it is characterised in that including:
Module is set up in tunnel, for along the physical pathway of P2MP-TE each subtab switching path, set up with
P2MP-TE each subtab switching path P2P bidirectional unicast tunnel one to one；
Detection module, for setting up clean culture two-way converting detection BFD for each described P2P bidirectional unicast tunnel,
Detect with the link that each subtab switching path to P2MP-TE is corresponding.
7. device as claimed in claim 6, it is characterised in that each P2P that module is set up is set up in described tunnel
The route display object in bidirectional unicast tunnel carries out road with reference to the record routing object of corresponding subtab switching path
Footpath calculates and produces.
8. device as claimed in claim 7, it is characterised in that module is set up in described tunnel, specifically for
Obtain the record routing object of each subtab switching path of P2MP-TE, according to record routing object, determine
The physical pathway information of corresponding subtab switching path；Corresponding P2P is set up according to described physical pathway information
Bidirectional unicast tunnel.
9. device as claimed in claim 6, it is characterised in that described detection module, specifically for detection
The clean culture BFD session in each P2P bidirectional unicast tunnel；Clean culture BFD when certain P2P bidirectional unicast tunnel
During session call drop, it is determined that P2MP-TE that the P2P bidirectional unicast tunnel of clean culture BFD call drop is corresponding occurs
The link failure of label switched path.
10. the device as described in claim 6 to 9 any one, it is characterised in that described detection module,
Being additionally operable to when link failure corresponding to certain subtab switching path being detected, notice P2MP-TE tunnel is corresponding
Subtab switching path carry out protection switching.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510295539.9A CN106301813A (en) | 2015-06-02 | 2015-06-02 | Detection method and device end to end in P2MP-TE multicast network |
| PCT/CN2016/072155 WO2016192401A1 (en) | 2015-06-02 | 2016-01-26 | End-to-end detection method and apparatus in p2mp-te multicast network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510295539.9A CN106301813A (en) | 2015-06-02 | 2015-06-02 | Detection method and device end to end in P2MP-TE multicast network |
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| CN106301813A true CN106301813A (en) | 2017-01-04 |
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| CN201510295539.9A Withdrawn CN106301813A (en) | 2015-06-02 | 2015-06-02 | Detection method and device end to end in P2MP-TE multicast network |
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| WO (1) | WO2016192401A1 (en) |
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| WO2016192401A1 (en) | 2016-12-08 |
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Application publication date: 20170104 |