CN101771561A - Method for creating label forwarding table, node equipment and system - Google Patents
Method for creating label forwarding table, node equipment and system Download PDFInfo
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- CN101771561A CN101771561A CN200810242209A CN200810242209A CN101771561A CN 101771561 A CN101771561 A CN 101771561A CN 200810242209 A CN200810242209 A CN 200810242209A CN 200810242209 A CN200810242209 A CN 200810242209A CN 101771561 A CN101771561 A CN 101771561A
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Abstract
The invention relates to the communication field and discloses a method for creating a label forwarding table, node equipment and a system to reduce the label maintenance workload of a network management system. The method comprises the following steps: a node obtains an entry label of an adjacent downstream node on a label switch path from the network management system and comprises a first label information base for storing an available label of the node; the node distributes the available label in the first label information base; and the node creates the label forwarding table by taking the entry label of the downstream node as own exit label and the available label distributed by self as own entry label, thus reducing the maintenance workload and effectively lowering the network maintenance cost. The embodiment of the invention also discloses the node equipment and the network system correspondingly.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of method for creating label forwarding table, node device and system.
Background technology
At label switched path (Multi-Protocol Label Switch, MPLS) in the network, by LSR (Label Switch Router LSR) goes up label allocation and transmits, allowed band MPLS label message correctly and finish forwarding efficiently.By generate the sequence label in path end to end according to certain algorithm on webmaster, the deployment of label is finished in LSR configuration one by one then in the prior art.
Central authorities' webmaster centralized control technique adopts central webmaster to finish the deployment of label.In this technology, the maintenance of label and sharing out the work is finished on webmaster.Clearly specifying the entrance and exit label on each LSR to come label allocation to transmit on the webmaster by the network management personnel.The network management personnel planned label switched path (Label Switch Path, LSP) after, (Network Management System NMS) disposes each LSR, sets up Label Forwarding Information Base on each LSR by network management system.Thereby the label of finishing this LSP is disposed.
The present inventor finds in to the research of above-mentioned prior art and practice process, the label maintenance work of prior art is finished on webmaster, requirement to webmaster is very high, and the process more complicated of configuration LSP, need the network management personnel to plan and write down the label information that each bar LSP uses.Be accompanied by the operation of network, each LSR go up the label operating position will because of the additions and deletions operation slowly become in disorder, the label maintenance workload on the webmaster can slowly become greatly, will be difficult to maintenance at last.
Summary of the invention
The invention provides a kind of method for creating label forwarding table, node device and system, to alleviate the label maintenance workload of webmaster.
Embodiments of the present invention provide a kind of method for creating label forwarding table, comprising:
Node obtains the inlet label of the adjacent downstream node of the above node of label switched path from webmaster; Described node comprises first tag information base of this node of storage available label;
Described node distributes the available label in described first tag information base;
Described node is the inlet label of the described downstream node outlet label as this node, and the available label that this node is distributed is set up label forwarding list item as the inlet label of this node.
Embodiments of the present invention also provide a kind of node device, comprising:
The label acquisition module is used for obtaining from webmaster the inlet label of the adjacent downstream node of this node device on the label switched path;
First tag information base, the available label that is used to store this node device;
The label distribution module, the available label that is used for distributing described first tag information base;
Forwarding-table item is set up module, be used for the outlet label of the inlet label of described downstream node that described label acquisition module is obtained as this node device, with described label distribution module assignment available label as the inlet label of this node device to set up label forwarding list item.
Embodiments of the present invention also provide a kind of node device, comprising:
Second tag information base, the available label that is used to store this node device;
The label distribution module, the available label that is used for distributing described second tag information base;
Forwarding-table item is set up module, is used for the described available label of described label distribution module assignment as the inlet label of this node device to set up label forwarding list item;
The tag transmits module is used for the available label transmission network management with the described second label distribution module assignment.
Embodiments of the present invention also provide a kind of network system, comprise adjacent upstream node, the adjacent downstream node of intermediate node on the label switched path and this intermediate node, wherein,
Described intermediate node comprises first tag information base of this node of storage available label, and described intermediate node is used for: the inlet label that obtains the adjacent downstream node of the above intermediate node of label switched path from webmaster;
Distribute the available label in described first tag information base;
With the inlet label of described downstream node outlet label as this node, with this node distribute available label as the inlet label of this node to set up label forwarding list item.
Technical scheme by embodiment of the invention description, node comprises that the tag information base of storing available label is with still untapped label in the assignable label range of record node, by the available label in the node distributing labels information bank, do not need to safeguard again the label user mode of each node on the whole network on the webmaster, therefore can reduce maintenance workload, effectively reduce the network operation cost.
Description of drawings
For the technical scheme and the advantage of technical problem that the present invention is solved, employing are clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention done further elaborating.Should understand, all diagrams are unnecessary proportionally draws, and the present invention is not caused restriction.In each accompanying drawing:
Fig. 1 is the flow chart of the embodiment of the invention one method for creating label forwarding table;
Fig. 2 is the flow chart of the embodiment of the invention two method for creating label forwarding table;
Fig. 3 is the flow chart of the embodiment of the invention three method for creating label forwarding table;
A kind of node device structure chart that Fig. 4 provides for the embodiment of the invention four;
A kind of node device structure chart that Fig. 5 provides for the embodiment of the invention five;
A kind of network architecture figure that Fig. 6 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
But the available label of mentioning in the embodiment of the invention is illustrated in the distributing labels scope of node, still untapped label.
The embodiment of the invention provides a kind of method for creating label forwarding table, to alleviate the label maintenance workload of webmaster.
Fig. 1 is the flow chart of the embodiment of the invention one method for creating label forwarding table, comprising:
S101, node obtain the inlet label of the adjacent downstream node of the above node of label switched path from webmaster; Described node comprises first tag information base of this node of storage available label;
In this step, described node can receive the configuration messages of transmitting of webmaster, and this transmits the inlet label that configuration messages carries the adjacent downstream node of described node.Described node also can extract the inlet label of this downstream node from described webmaster.
The inlet label of this downstream node that is comprised in the webmaster can be distributed by webmaster; Also can send a label solicitation message to this downstream node by webmaster, send a label response message by this downstream node to webmaster, carry this downstream node distributed labels in this label response message, this downstream node can be with this label of distributing inlet label as this downstream node when setting up the label forwarding list item of this downstream node.
In this step, described node can be a label from the inlet label that webmaster obtains the adjacent downstream node of the above node of label switched path, also can be a plurality of labels.
S102, described node distribute the available label in described first tag information base;
In this step, the available label in first tag information base that described node distributes can be a label, also can be a plurality of labels.
S103, described node be the inlet label of the described downstream node outlet label as this node, with this node distribute available label as the inlet label of this node, set up label forwarding list item.
When the available label that has, described node to distribute when the inlet label of described downstream node has one, can only set up a label forwarding list item.When the inlet label of described downstream node has a plurality ofly, the available label that described node distributes has when a plurality of, can set up a plurality of label forwarding list items.For example, when the inlet label of downstream node has a plurality of, the available label that described node distributes has a plurality of, and the inlet number of tags of downstream node is identical with the available label number that described node distributes, the available label that inlet label and a plurality of described node of a plurality of downstream nodes can be distributed is corresponding one by one, to set up a plurality of label forwarding list items.
Step 103 back can also comprise:
S104, described node are transferred to the adjacent upstream node of described the above node of label switched path with the available label in first tag information base of described distribution, when being used to set up the label forwarding list item of this upstream node as the outlet label of this upstream node.
Wherein, the adjacent upstream node that is transferred to described the above node of label switched path of the available label in described node first tag information base that will distribute comprises:
Available label in first tag information base that described node will distribute is carried to described upstream node by RESV message; Perhaps: the available label in first tag information base that described node will distribute sends to described webmaster, sends to described upstream node by described webmaster.
Method for creating label forwarding table by embodiment of the invention description, node comprises that the tag information base of storing available label is with still untapped label in the assignable label range of record node, by the available label in the node distributing labels information bank, do not need to safeguard again the label user mode of each node on the whole network on the webmaster, therefore can reduce maintenance workload, effectively reduce the network operation cost.
Fig. 2 is the flow chart of the embodiment of the invention two method for creating label forwarding table, comprising:
The adjacent downstream node of node receives the label solicitation message that webmaster sends on S201, the label switched path; This downstream node comprises second tag information base of this node of storage available label;
In the present embodiment, described downstream node can be the destination node of described label switched path; Perhaps when described label switched path comprised two or more intermediate nodes, described downstream node was an intermediate node outside the described node.
S202, this downstream node distribute available label to give webmaster from second tag information base;
In this step, downstream node can send the label response message to webmaster, carries the available label that this downstream node distributes in this label response message from second tag information base.
S203, described node receive the label solicitation message that webmaster sends; Described node comprises first tag information base of this node of storage available label;
S204, described node distribute available label to give webmaster from first tag information base;
In this step, described node can send the label response message to webmaster, carries the available label that described node distributes in this label response message from first tag information base.
The adjacent upstream node of S205, described the above node of label switched path receives from webmaster and transmits configuration messages, and this is transmitted configuration messages and carries described node distributed labels;
In the present embodiment, described upstream node can be the source node of described label switched path; Perhaps described upstream node can be an intermediate node outside the described node.
S206, described upstream node are set up the label forwarding list item of this upstream node; When setting up the label forwarding list item of described upstream node with the outlet label of described node distributed labels as this upstream node;
S207, described node receive the forwarding-table item configuration messages from webmaster, and this forwarding-table item configuration messages carries described node and described downstream node distributed labels;
S208, described node are set up the label forwarding list item of described node; When setting up the label forwarding list item of described node with the inlet label of described node distributed labels, with the outlet label of described downstream node distributed labels as described node as described node;
S209, described downstream node receive the forwarding-table item configuration messages from webmaster, and this forwarding-table item configuration messages carries described downstream node distributed labels;
S210, described downstream node are set up the label forwarding list item of this downstream node; When setting up the label forwarding list item of described downstream node with the inlet label of this downstream node distributed labels as this downstream node.
Method for creating label forwarding table by embodiment of the invention description, node comprises that the tag information base of storing available label is with still untapped label in the assignable label range of record node, by the available label in the node distributing labels information bank, do not need to safeguard again the label user mode of each node on the whole network on the webmaster, therefore can reduce maintenance workload, effectively reduce the network operation cost.
Fig. 3 is the flow chart of the embodiment of the invention three method for creating label forwarding table, comprising:
The adjacent downstream node of node receives the configuration messages of transmitting of webmaster transmission on S301, the label switched path; This downstream node comprises second tag information base of storing this downstream node available label;
In the present embodiment, described downstream node can be the destination node of described label switched path; Described downstream node also can be an intermediate node outside the described node.
S302, this downstream node distribute available label and send this label to webmaster from second tag information base;
In this step, downstream node can send transmits configuration response message to webmaster, and this is transmitted and carry the available label that this downstream node distributes in the configuration response message from second tag information base.
S303, described downstream node are set up the label forwarding list item of this downstream node; When setting up the label forwarding list item of described downstream node with the inlet label of this downstream node distributed labels as this downstream node;
S304, described node receive the configuration messages of transmitting of webmaster transmission, and this is transmitted configuration messages and carries described downstream node distributed labels; Described node comprises first tag information base of this node of storage available label;
S305, described node distribute available label and send this label to webmaster from first tag information base;
In this step, described node can send transmits configuration response message to webmaster, and this is transmitted and carry the available label that described node distributes in the configuration response message from first tag information base.
S306, described node are set up the label forwarding list item of described node; When setting up the label forwarding list item of described node with the inlet label of described node distributed labels, with the outlet label of described downstream node distributed labels as described node as described node;
The adjacent upstream node of S307, described the above node of label switched path receives from webmaster and transmits configuration messages, and this is transmitted configuration messages and carries described node distributed labels;
In the present embodiment, described upstream node can be the source node of described label switched path; Described upstream node also can be another intermediate node outside the described node.
S308, described upstream node are set up the label forwarding list item of this upstream node; When setting up the label forwarding list item of described upstream node with the outlet label of described node distributed labels as this upstream node.
Method for creating label forwarding table by embodiment of the invention description, node comprises that the tag information base of storing available label is with still untapped label in the assignable label range of record node, by the available label in the node distributing labels information bank, do not need to safeguard again the label user mode of each node on the whole network on the webmaster, therefore can reduce maintenance workload, effectively reduce the network operation cost.
Fig. 4 is a kind of node device structure chart that the embodiment of the invention four provides, and comprising:
First tag information base 402, the available label that is used to store this node device;
Forwarding-table item is set up module 404, be used for the outlet label of the inlet label of described downstream node that described label acquisition module is obtained as this node device, with described label distribution module assignment available label as the inlet label of this node device to set up label forwarding list item.
The node device that the embodiment of the invention four provides can also comprise:
Tag transmits module 405, be used for the available label that described label distribution module is extracted is transferred to the adjacent upstream node of this node device on the described label switched path, when being used to set up the label forwarding list item of this upstream node as the outlet label of this upstream node.
The node device that the embodiment of the invention four provides can be the intermediate node on the label switched path.
Fig. 5 is a kind of node device structure chart that the embodiment of the invention five provides, and comprising:
Second tag information base 501, the available label that is used to store this node device;
Forwarding-table item is set up module 503, is used for the described available label of described label distribution module assignment as the inlet label of this node device to set up label forwarding list item;
Tag transmits module 504 is used for the available label transmission network management with the described second label distribution module assignment.
The node device that the embodiment of the invention five provides can be the destination node on the label switched path.
The node apparatus that the embodiment of the invention is described can comprise that the tag information base of storing available label is with still untapped label in the assignable label range of record node, by the available label in the node apparatus distributing labels information bank, do not need to safeguard again the label user mode of each node on the whole network on the webmaster, therefore can reduce maintenance workload, effectively reduce the network operation cost.
Fig. 6 is a kind of network architecture figure that the embodiment of the invention provides, and comprises the intermediate node 601 on the label switched path and upstream node 602, the downstream node 603 of this intermediate node, wherein,
Described intermediate node 601 comprises first tag information base of this node of storage available label, and described intermediate node 601 is used for: the inlet label that obtains the downstream node 603 of the above intermediate node 601 of label switched path from webmaster;
Distribute the available label in described first tag information base;
With the inlet label of described downstream node 603 outlet label as this node, with this node distribute available label as the inlet label of this node to set up label forwarding list item.
The network system that the embodiment of the invention is described, node can comprise that the tag information base of storing available label is with still untapped label in the assignable label range of record node, by the available label in the node distributing labels information bank, do not need to safeguard again the label user mode of each node on the whole network on the webmaster, therefore can reduce maintenance workload, effectively reduce the network operation cost.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Specification is done as a whole, is used to support protection scope of the present invention.
Claims (11)
1. a method for creating label forwarding table is characterized in that, comprising:
Node obtains the inlet label of the adjacent downstream node of the above node of label switched path from webmaster; Described node comprises first tag information base of this node of storage available label;
Described node distributes the available label in described first tag information base;
Described node is the inlet label of the described downstream node outlet label as this node, and the available label that this node is distributed is set up label forwarding list item as the inlet label of this node.
2. as the method under the claim 1, it is characterized in that:
The inlet label of described downstream node is distributed by described webmaster; Perhaps:
Described downstream node comprises second tag information base of this node of storage available label, and the inlet label of described downstream node is by distribution in the available label of described downstream node from described second tag information base and send to described webmaster.
3. the method for claim 1 is characterized in that, also comprises:
Described node is transferred to the adjacent upstream node of this node on the described label switched path with the available label in first tag information base of described distribution, when being used to set up the label forwarding list item of this upstream node as the outlet label of this upstream node.
4. method as claimed in claim 3 is characterized in that,
Described node comprises the adjacent upstream node that the available label in first tag information base of described distribution is transferred to this node on the described label switched path:
Described node carries the available label in first tag information base of described distribution to described upstream node by RESV message; Perhaps:
Described node sends to described webmaster with the available label in first tag information base of described distribution, sends to described upstream node by described webmaster.
5. method as claimed in claim 2 is characterized in that, described downstream node is the destination node of described label switched path; Perhaps, described downstream node is an intermediate node outside the described node.
6. the method for claim 1 is characterized in that, described downstream node comprises the tag information base of storing described downstream node available label;
Described downstream node distributed labels is the available label of described downstream node from the tag information base extraction of this downstream node; When the available label that described downstream node extracts is used to set up the label forwarding list item of this downstream node as the inlet label of this downstream node.
7. as the described method of claim 1-4, it is characterized in that,
Described upstream node is the source node of described label switched path; Perhaps, described upstream node is an intermediate node outside the described node.
8. a node device is characterized in that, comprising:
The label acquisition module is used for obtaining from webmaster the inlet label of the adjacent downstream node of this node device on the label switched path;
First tag information base, the available label that is used to store this node device;
The label distribution module, the available label that is used for distributing described first tag information base;
Forwarding-table item is set up module, be used for the outlet label of the inlet label of described downstream node that described label acquisition module is obtained as this node device, with described label distribution module assignment available label as the inlet label of this node device to set up label forwarding list item.
9. node device as claimed in claim 8 is characterized in that, also comprises:
The tag transmits module, be used for the available label of described label distribution module assignment is transferred to the adjacent upstream node of this node device on the described label switched path, when being used to set up the label forwarding list item of this upstream node as the outlet label of this upstream node.
10. a node device is characterized in that, comprising:
Second tag information base, the available label that is used to store this node device;
The label distribution module, the available label that is used for distributing described second tag information base;
Forwarding-table item is set up module, is used for the described available label of described label distribution module assignment as the inlet label of this node device to set up label forwarding list item;
The tag transmits module is used for the available label transmission network management with the described second label distribution module assignment.
11. a network system comprises it is characterized in that adjacent upstream node, the adjacent downstream node of intermediate node on the label switched path and this intermediate node,
Described intermediate node comprises first tag information base of this node of storage available label, and described intermediate node is used for: the inlet label that obtains the adjacent downstream node of the above intermediate node of label switched path from webmaster;
Distribute the available label in described first tag information base;
With the inlet label of described downstream node outlet label as this node, with this node distribute available label as the inlet label of this node to set up label forwarding list item.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104468245A (en) * | 2014-12-31 | 2015-03-25 | 北京华为数字技术有限公司 | Label distribution method and device |
| WO2016115823A1 (en) * | 2015-01-19 | 2016-07-28 | 中兴通讯股份有限公司 | Method and apparatus for forwarding label construction and label packet |
| CN106936713A (en) * | 2015-12-30 | 2017-07-07 | 华为技术有限公司 | A kind of label management method, data flow processing method and equipment |
| CN109428750A (en) * | 2017-08-29 | 2019-03-05 | 北京华为数字技术有限公司 | A kind of point-to-multipoint service transmission method and device |
| CN113132235A (en) * | 2019-12-31 | 2021-07-16 | 中兴通讯股份有限公司 | Data message processing method based on virtual circuit and construction method of forwarding table item |
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2008
- 2008-12-31 CN CN200810242209A patent/CN101771561A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104468245B (en) * | 2014-12-31 | 2018-05-11 | 北京华为数字技术有限公司 | label distribution method and device |
| CN104468245A (en) * | 2014-12-31 | 2015-03-25 | 北京华为数字技术有限公司 | Label distribution method and device |
| US10581733B2 (en) | 2015-01-19 | 2020-03-03 | Xi'an Zhongxing New Software Co., Ltd. | Methods and devices for constructing label and forwarding label packet |
| WO2016115823A1 (en) * | 2015-01-19 | 2016-07-28 | 中兴通讯股份有限公司 | Method and apparatus for forwarding label construction and label packet |
| CN106936713A (en) * | 2015-12-30 | 2017-07-07 | 华为技术有限公司 | A kind of label management method, data flow processing method and equipment |
| CN106936713B (en) * | 2015-12-30 | 2020-02-21 | 华为技术有限公司 | Label management method, data stream processing method and equipment |
| US11233732B2 (en) | 2015-12-30 | 2022-01-25 | Huawei Technologies Co., Ltd. | Label management method, data stream processing method, and device |
| US11588730B2 (en) | 2015-12-30 | 2023-02-21 | Huawei Technologies Co., Ltd. | Label management method, data stream processing method, and device |
| CN109428750A (en) * | 2017-08-29 | 2019-03-05 | 北京华为数字技术有限公司 | A kind of point-to-multipoint service transmission method and device |
| CN109428750B (en) * | 2017-08-29 | 2021-10-26 | 北京华为数字技术有限公司 | Point-to-multipoint service transmission method and device |
| CN113132235A (en) * | 2019-12-31 | 2021-07-16 | 中兴通讯股份有限公司 | Data message processing method based on virtual circuit and construction method of forwarding table item |
| CN113132235B (en) * | 2019-12-31 | 2023-03-31 | 中兴通讯股份有限公司 | Data message processing method based on virtual circuit and construction method of forwarding table item |
| US11924094B2 (en) | 2019-12-31 | 2024-03-05 | Zte Corporation | Virtual circuit-based data packet processing method and forwarding table entry construction method |
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Open date: 20100707 |