CN102158396B - Label distribution method and device for node - Google Patents
Label distribution method and device for node Download PDFInfo
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- CN102158396B CN102158396B CN201110038040.1A CN201110038040A CN102158396B CN 102158396 B CN102158396 B CN 102158396B CN 201110038040 A CN201110038040 A CN 201110038040A CN 102158396 B CN102158396 B CN 102158396B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/22—Alternate routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
- H04L45/507—Label distribution
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a label distribution method and a label distribution device for a node. The method comprises the following steps of: after the node receives a path message carrying a backup object, creating a backup path state block for a backup label switch path; and searching for a main path state block with the same object and rapid rerouting attributes from all the nodes of a protected label switch path, confirming the node comprising the main path state block with the same object and the rapid rerouting attributes to be a sink node if the main path state block with the same object and the rapid rerouting attributes are found, and copying a label bound on the found main path state block to the backup path state block. By the method and the device, label resources can be prevented from being distributed to the backup label switch path (LSP) by the sink node, thereby reducing the wasting of the label resources.
Description
Technical field
The present invention relates to the method for network node distributing labels in data network communication field, particularly relate to backup Quickly regroup (DETOUR FRR, DETOUR Fast ReRoute) in the method for aggregation node (MP, Multi-Point) distributing labels and device.
Background technology
DETOUR FRR also refers to (1: 1) one to one backup (One-to-One Backup) mode FRR that RFC4090 defines; which allows Point of Local Repair (PLR; Point of Local Repair) be label switched path (the protected LSP of each protection; protected Label Switch Path; also main tunnel LSP is claimed) independent establishment backup LSP; this backup LSP is otherwise known as Detour LSP in agreement, for the re-route traffic when fault occurs.
When a node adopts One-to-One Backup mode to carry out FRR protection for the protected LSP of process; if adopt Detour LSP mode to carry out backing up the foundation of LSP, just need by adding DETOUR object to distinguish from protected LSP or the PATH message from backup LSP in path (PATH) message.
Backup LSP uses SES SION, SENDER_TEMPLATE object identical with protected LSP, usually also the backup LSP of this DETOUR of carrying object is called Detour LSP, as shown in Figure 1, path (Path) message of main tunnel label switching path (protected LSP) is transmitted along the path of R1 → R2 → R3 → R4 → R5; After the Path message of backup label switching path (Detour LSP) is delivered to node R 4 along the path of R2 → R6 → R7 → R4 → R5, according to the method that RFC (Request for Comments) agreement specifies, node R 4 must independent of the Path message of protected LSP process Detour LSP, to avoid loop detection.Therefore as shown in fig. 1, the label that node R 4 is distributed for Detour LSP is L44, this from node R 4 for the label that protected LSP distributes is that L34 is different; But node R 4 can merge the Path message of protected LSP and detour LSP as MP node, also just define L34 and enter the corresponding outgoing label L35 of label, L44 enters label also necessary corresponding outgoing label L35, just can ensure that forwarding label stream through Detour LSP can correctly forward by switch label.For the R4 node as MP; overabsorption one is just needed to enter label for doing Detour protection through its tunnel; Detour FRR is the protection of (1: 1) one to one; be different from the protection of FacilityFRR one-to-many (1: N), namely a backup tunnel can protect many main tunnels.If that is there is 10k bar to have the main tunnel of FRR through R4, overabsorption 10k is so just needed to enter label to ensure the protection of Detour FRR.
Because label is also a kind of resource, therefore need a kind of method can allow in Detour LSP as the node of MP and its as the nodes sharing in protected LSP same enter label, so just can be reduced to Detour lsp distributing labels resource at this node as MP, realize sharing of resource.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method and device of peer distribution label, can allow in Detour LSP as the node of MP and its as the nodes sharing in protected LSP same enter label.
In order to solve the problems of the technologies described above, the invention provides a kind of method of peer distribution label, comprising:
After node receives the PATH carrying backup object, for backup label switching path creates backup path status block;
Find under all nodes of main tunnel label switching path and there is same object and the main path status block with Quickly regroup attribute, if find, confirm that this node is aggregation node, by label-copying that the main path status block searched is bound to backup path status block.
Further, after node receives the PATH carrying backup object, for backup label switching path creates backup path status block, specifically comprise:
After this node receives the PATH carrying backup object, according to the data structure of the path state block of this PATH under corresponding SESSION example being backup label switching path creates backup path status block.
Further, find under all nodes of main tunnel label switching path and there is same object and the main path status block with Quickly regroup attribute, if find, confirm that this node is aggregation node, specifically comprise:
Under the SESSION example of the correspondence of main tunnel label switching path path state block data structure on find and there is identical SESSION, SENDER_TEMPLATE object and there is the main path status block of Quickly regroup attribute;
If find this main path status block, then whether the path by comparing main path status block and backup path status block follow-up is separately consistent, if consistent, confirm that this node is aggregation node, if inconsistent, confirms that this node is not aggregation node.
Further, the method also comprises:
By the reserving message of main path status block, the label copied for backup path status block is advertised to the upstream node of aggregation node on backup label switching path.
Further, if node does not find corresponding main path status block, or, confirm that this node is not aggregation node, then also comprise:
For this peer distribution new enter label, waiting receive reserving message after issue corresponding forwarding entry, then be advertised to the upstream node of this node by reserving message.
In order to solve the problems of the technologies described above, the invention provides a kind of device for peer distribution label, comprise the path state block creation module, the path state block that connect successively and searching module, node type judge module and node label processing module, wherein:
Path state block creation module, also connected node type judging module, for after receiving the PATH carrying backup object, the backup path status block created for backup label switching path is exported to node type judge module, searches module to path state block simultaneously and export look-up command;
Path state block searches module, has same object and the main path status block with Quickly regroup attribute, and lookup result is exported to node type judge module for searching under all nodes of main tunnel label switching path according to this look-up command;
Node type judge module, for being find corresponding main path status block according to lookup result, then will determine that this node is aggregation node according to this main path status block and backup main path status block, then export the instruction of aggregation node tag processes to node label processing module;
Node label processing module, for according to the instruction of aggregation node tag processes by label-copying that main path status block is bound to backup path status block.
Further,
After path state block creation module receives PATH, according to the data structure of the path state block of this PATH under corresponding SESSION example being backup label switching path creates backup path status block.
Further,
The data structure that path state block searches module path state block under the SESSION example of the correspondence of main tunnel label switching path is found and there is identical SESSION, SENDER_TEMPLATE object and the main path status block with Quickly regroup attribute; If find this main path status block, then whether the path by comparing main path status block and backup path status block follow-up is separately consistent, if consistent, confirm that this node is aggregation node, if inconsistent, confirms that this node is not aggregation node.
Further,
The label copied for backup path status block is also advertised to the upstream node of aggregation node on backup label switching path by the reserving message of main path status block by node label processing module.
Further,
Node type judge module is do not find corresponding main path status block according to lookup result, or, confirm that this node is not aggregation node, then export the instruction of ordinary node tag processes to node label processing module;
Node label processing module according to the instruction of ordinary node tag processes be this peer distribution new enter label, waiting receive reserving message after issue corresponding forwarding entry, then be advertised to the upstream node of this node by reserving message.
The invention provides a kind of is the method for peer distribution label on DETOUR FRR backup path, this MP merges to use for protected LSP, detour LSP and identical enters label, forwarding plane only needs a Label Forwarding Entry that the label stream exchange that enters entered along different incoming interface just can be supported to become same outgoing label, forwards from same outgoing interface.Thus avoid this MP is DetourLSP reallocation label resources, thus decreases the waste of label resources.
Accompanying drawing explanation
Fig. 1 is that in prior art, MP node is that protected LSP and Detour LSP distribute different label figure;
Fig. 2 is the flow chart of the embodiment of the method for peer distribution label of the present invention;
Fig. 3 is as the schematic diagram that the R4 node of MP is protected LSP and Detour LSP distribution same label in the embodiment of the method shown in Fig. 2;
Fig. 4 is the structured flowchart of the device embodiment for peer distribution label of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, technical scheme of the present invention is described in detail.The embodiment below exemplified only for instruction and explanation of the present invention, and does not form the restriction to technical solution of the present invention.
Provided by the invention is the embodiment of the method for peer distribution label, and its flow process as shown in Figure 2, comprises the steps:
210: after node receives path (Path) message of carrying backup (DETOUR) object, be that backup label switching path creates backup path status block (PSB, Path State Block) according to this Path message;
Namely for Detour LSP creates the PSBd of backup on the PSB chained list under corresponding SESSION example.PSB under SESSION example, except list structure, can also be stated by other data structure, such as hash data structure or tree structure.
220: find under all nodes of protected LSP and there is same object and the main PSB with FRR attribute, if find, perform the following step, otherwise perform step 250;
Namely the PSB chained list under the SESSION example of correspondence is found and there is identical SESSION, SENDER_TEMPLATE object and the PSBp possessing FRR attribute.
230: confirm whether this node is aggregation node (MP), is perform the following step, otherwise perform step 250;
Whether consistent by comparing the follow-up path of PSBd with PSBp, if consistent (such as being R5), confirm that this node is MP, then LSP i.e. the protected LSP that PSBp is corresponding; If inconsistent, confirm that this node is not MP.
240: the label Lp that PSBp binds is copied to PSBd, then by reserved (RESV) message of PSBd, the label Lp copied is advertised to upstream node R7, process ends;
So, just as on this node of MP no longer for its Detour lsp is dispensed into label resources and issue new list item, but with its protected LSP share same enter label Lp.
250: for this peer distribution new enter label, issue corresponding forwarding entry after the RESV of receiving message waiting, then give its upstream node by RESV message announcement.
As shown in Figure 3, the path that main tunnel Protected LSP walks is R1 → R2 → R3 → R4 → R5, and the path that backup tunnel Detour lsp walks is R2 → R6 → R7 → R4 → R5; By said method embodiment, for wherein as MP R4 peer distribution be same enter label L34.
Once Point of Local Repair (PLR, Point of Local Repair) (as R2) Protected LSP on adjacent link (as R2 → R3) or node (as R3) break down, then this PLR node (R2) by flow switch to Detour LSP, and will use the outgoing label that Detour LSP is corresponding.
The label forwarded by Detour LSP is flow to into carrying label L34 during MP, then the outgoing label L35 corresponding according to L34 inquiry, and switch label continues to be forwarded to downstream node R5.
The present invention attempts the RSVP (RSVP-TE at Traffic Engineering extensions, Resource Reservation Protocol-Traffic Engineering) in on DETOUR FRR backup label switching path for the peer distribution as MP enters label, once the node on discovery Detour LSP is the node as MP, protected LSP and Detour LSP can merge Path message in this node subsequent path, then the direct label-copying bound by protected LSP is to Detour LSP, and by the RESV message of Detour LSP, this label is advertised to the upstream node of this node, doing so avoids this node as MP is that Detour LSP is dispensed into label resources again, thus cause the waste of resource.
The present invention also accordingly provides the device embodiment into peer distribution label, and its structure as shown in Figure 4, comprises the PSB creation module 410, the PSB that connect successively and searches module 420, node type judge module 430 and node label processing module 440, wherein:
PSB creation module 410, also connected node type judging module 430, for after receiving the Path message of carrying DETOUR object, the backup PSBd being the establishment of backup label switching path according to this Path message is exported to node type judge module 430, and searching module 420 to PSB exports PSB look-up command simultaneously;
For Detour LSP creates new PSBd on the PSB chained list of PSB creation module 410 under corresponding SESSION example.
PSB searches module 420, has same object and the PSBp with FRR attribute, and lookup result is exported to node type judge module 430 for searching under all nodes of protected LSP according to PSB look-up command;
PSB searches searching on the PSB chained list of module 420 under the SESSION example of correspondence to be had identical SESSION, SENDER_TEMPLATE object and possesses the PSBp of FRR attribute.
Node type judge module 430, for being find to there is same object and the PSB with FRR attribute according to lookup result, if be then aggregation node by the PSBd decision node that PSBp and the PSB creation module 410 found according to this creates, then export the instruction of MP tag processes to node label processing module 440, otherwise export common label processing instruction to node label processing module 440;
Whether node type judge module 430 is consistent by comparing the follow-up path of PSBd with PSBp, if consistent, confirms that this node is MP, then LSP i.e. the protected LSP that PSBp is corresponding; If inconsistent, confirm that this node is not MP.
Node label processing module 440, for the label Lp that PSBp binds being copied to PSBd according to the instruction of MP tag processes, then is advertised to upstream node by the RESV message of PSBd by the label Lp copied; According to common label processing instruction be this peer distribution new enter label, issue corresponding forwarding entry after the RESV of receiving message waiting, then give its upstream node by RESV message announcement.
More than illustrate; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (10)
1. a method for peer distribution label, comprising:
After node receives the PATH carrying backup object, for backup label switching path creates backup path status block;
Find under all nodes of main tunnel label switching path and there is same object and the main path status block with Quickly regroup attribute, if to find and the described main path status block path follow-up separately with described backup path status block is consistent, confirm that this node is aggregation node, by label-copying that the main path status block searched is bound to backup path status block.
2. in accordance with the method for claim 1, it is characterized in that, after node receives the PATH carrying backup object, for backup label switching path creates backup path status block, specifically comprise:
After this node receives the PATH carrying backup object, create described backup path status block according in the data structure of the path state block of this PATH under corresponding SESSION example for described backup label switching path.
3. in accordance with the method for claim 1, it is characterized in that, find under all nodes of main tunnel label switching path and there is same object and the main path status block with Quickly regroup attribute, if find, confirm that this node is aggregation node, specifically comprise:
Under the SESSION example of the correspondence of main tunnel label switching path path state block data structure on find and there is identical SESSION, SENDER_TEMPLATE object and there is the main path status block of described Quickly regroup attribute;
If find this main path status block, then whether consistent by the path that more described main path status block is follow-up separately with described backup path status block, if consistent, confirm that this node is described aggregation node, if inconsistent, confirm that this node is not described aggregation node.
4., according to the method described in any one of claims 1 to 3, it is characterized in that, also comprise:
By the reserving message of main path status block, the label copied for described backup path status block is advertised to the upstream node of described aggregation node on described backup label switching path.
5., according to the method described in any one of claims 1 to 3, it is characterized in that, if described node does not find corresponding main path status block, or, confirm that this node is not aggregation node, then also comprise:
For this peer distribution new enter label, waiting receive reserving message after issue corresponding forwarding entry, then be advertised to the upstream node of this node by reserving message.
6. be a device for peer distribution label, comprise the path state block creation module, the path state block that connect successively and search module, node type judge module and node label processing module, wherein:
Path state block creation module, also connected node type judging module, for after receiving the PATH carrying backup object, the backup path status block created for backup label switching path is exported to node type judge module, searches module to path state block simultaneously and export look-up command;
Path state block searches module, has same object and the main path status block with Quickly regroup attribute, and lookup result is exported to node type judge module for searching under all nodes of main tunnel label switching path according to described look-up command;
Node type judge module, the described lookup result exported for searching module according to described path state block finds corresponding main path status block, then will determine that this node is aggregation node according to this main path status block and backup main path status block, then export the instruction of aggregation node tag processes to node label processing module;
Node label processing module, for giving described backup path status block according to the instruction of aggregation node tag processes by label-copying that described main path status block is bound.
7., according to device according to claim 6, it is characterized in that,
After described path state block creation module receives described PATH, create described backup path status block according in the data structure of the path state block of this PATH under corresponding SESSION example for described backup label switching path.
8., according to device according to claim 6, it is characterized in that,
The data structure that described path state block searches module path state block under the SESSION example of the correspondence of main tunnel label switching path is found and there is identical SESSION, SENDER_TEMPLATE object and the main path status block with described Quickly regroup attribute; If find this main path status block, then whether consistent by the path that more described main path status block is follow-up separately with described backup path status block, if consistent, confirm that this node is described aggregation node, if inconsistent, confirm that this node is not described aggregation node.
9., according to the device described in any one of claim 6 to 8, it is characterized in that,
The label copied for described backup path status block is also advertised to the upstream node of described aggregation node on described backup label switching path by the reserving message of described main path status block by described node label processing module.
10., according to the device described in any one of claim 6 to 8, it is characterized in that,
The described lookup result that described node type judge module searches module output according to described path state block does not find corresponding main path status block, or, confirm that this node is not described aggregation node, then export the instruction of ordinary node tag processes to described node label processing module;
Described node label processing module according to the instruction of described ordinary node tag processes be this peer distribution new enter label, waiting receive reserving message after issue corresponding forwarding entry, then be advertised to the upstream node of this node by reserving message.
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| CN201110038040.1A CN102158396B (en) | 2011-02-15 | 2011-02-15 | Label distribution method and device for node |
| PCT/CN2011/081185 WO2012109913A1 (en) | 2011-02-15 | 2011-10-24 | Method and device for distributing identifier to node |
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| CN201110038040.1A CN102158396B (en) | 2011-02-15 | 2011-02-15 | Label distribution method and device for node |
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| CN102158396B true CN102158396B (en) | 2015-01-07 |
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| CN102158396B (en) * | 2011-02-15 | 2015-01-07 | 中兴通讯股份有限公司 | Label distribution method and device for node |
| CN103200099B (en) * | 2012-01-10 | 2016-08-24 | 迈普通信技术股份有限公司 | A kind of MPLS quickly searches the method and device of destination node |
| CN103209088B (en) * | 2012-01-17 | 2016-12-28 | 华为技术有限公司 | Ring network label switch path creation method and associated devices and communication system |
| CN105634948B (en) * | 2014-10-28 | 2020-04-10 | 中兴通讯股份有限公司 | LSP reconvergence identification method and device in P2MP |
| CN109361596B (en) * | 2018-10-26 | 2021-07-06 | 新华三技术有限公司合肥分公司 | Route calculation method and device and electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026590A (en) * | 2007-04-05 | 2007-08-29 | 华为技术有限公司 | Multi-link failure processing method and label switching router |
| CN101030939A (en) * | 2007-03-27 | 2007-09-05 | 华为技术有限公司 | Method and apparatus for establishing and restoring label exchange path in automatic-exchange optical network |
| JP2007318689A (en) * | 2006-05-29 | 2007-12-06 | Nippon Telegr & Teleph Corp <Ntt> | Route aggregation method of lsp in multicast mpls, router, and lsp route aggregation program |
| CN101599859A (en) * | 2009-06-30 | 2009-12-09 | 华为技术有限公司 | A kind of guard method of bidirectional tunnel, system and node |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100725005B1 (en) * | 2000-11-22 | 2007-06-04 | 주식회사 케이티 | Fast rerouting method in mpls network |
| CN102158396B (en) * | 2011-02-15 | 2015-01-07 | 中兴通讯股份有限公司 | Label distribution method and device for node |
-
2011
- 2011-02-15 CN CN201110038040.1A patent/CN102158396B/en active Active
- 2011-10-24 WO PCT/CN2011/081185 patent/WO2012109913A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007318689A (en) * | 2006-05-29 | 2007-12-06 | Nippon Telegr & Teleph Corp <Ntt> | Route aggregation method of lsp in multicast mpls, router, and lsp route aggregation program |
| CN101030939A (en) * | 2007-03-27 | 2007-09-05 | 华为技术有限公司 | Method and apparatus for establishing and restoring label exchange path in automatic-exchange optical network |
| CN101026590A (en) * | 2007-04-05 | 2007-08-29 | 华为技术有限公司 | Multi-link failure processing method and label switching router |
| CN101599859A (en) * | 2009-06-30 | 2009-12-09 | 华为技术有限公司 | A kind of guard method of bidirectional tunnel, system and node |
Non-Patent Citations (1)
| Title |
|---|
| Multi-Point to Multi-Point Traffic Engineering;Mohamed Chaitou,jean-Louis le roux;《computers and communications》;20080907;第1047-1055页第II-IV节 * |
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| CN102158396A (en) | 2011-08-17 |
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