CN102420744A - Traffic engineering prototype system based on MPLS (Multiprotocol Label Switching) - Google Patents
Traffic engineering prototype system based on MPLS (Multiprotocol Label Switching) Download PDFInfo
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- CN102420744A CN102420744A CN2011103159158A CN201110315915A CN102420744A CN 102420744 A CN102420744 A CN 102420744A CN 2011103159158 A CN2011103159158 A CN 2011103159158A CN 201110315915 A CN201110315915 A CN 201110315915A CN 102420744 A CN102420744 A CN 102420744A
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Abstract
The invention discloses a traffic engineering prototype system based on MPLS (Multiprotocol Label Switching), which comprises an LSP (Label Switched Path) managing module, wherein one end of the LSP managing module is connected with an MPLS forwarding module, the other end of the LSP managing module is connected with an RSVP-TE (Resource Reservation Protocol Traffic Engineering) signaling module, the LSP managing module is further connected with one end of a CSPF (Constraint-based Shortest Path First), a TEDB (Traffic Engineering Database) is arranged in the CSPE, and the other end of the CSPF is connected with an OSPF (Open Shortest Path First) and ISIS (Intermediate System to Intermediate System) extension module. According to the traffic engineering prototype system based on the MPLS, disclosed by the invention, a service provider can precisely control a path through which the flow passes so that jamming nodes can be avoided and a problem that a part of path is overloaded and a part of path is idle is solved; in addition, timing optimization can be carried out, preemption can be carried out according to priority, and under a resource-constrained condition, a bandwidth resource and the like of a CR-LSP (constraint-based routed-LEP) tunnel with lower priority is preempted; and simultaneously, the protection can be provided under the condition that a link or a node has a fault by a backup path and fast rerouting technique.
Description
Technical field
The present invention relates to a kind of traffic engineering, concrete relate to a kind of traffic engineering system based on MPLS.
Background technology
Flourish along with the Internet; Various application rapid growths such as various multimedias, video, online game, ecommerce on the network, ISP (ISP) have to network infrastructure is constantly adjusted, link is carried out continuous dilatation to satisfy the demand of various operational lines for bandwidth resources.Therefore traffic engineering is arisen at the historic moment.Traffic engineering is a kind of can Business Stream being mapped on the real physical links, and is simultaneously again can the Automatic Optimal Internet resources that the application-specific service performance requires to realize, have that macroscopic view is regulated and the network engineering technology of micromanagement ability.The target that realizes traffic engineering be effectively, operational network reliably, optimize network resources uses and improves professional service performance simultaneously.It is excessive inevitably can to occur certain bar link flow demand in the network, and exists some not by the link of abundant use simultaneously.Traffic engineering
[2]Core shift flow exactly, get on thereby make the flow that blocks link can transfer to those links that are not fully utilized.
The implementation method of traffic engineering (Traffic Engineering) has multiple: method, the whole network operation ATM PVC in interface adjusted metric value connect entirely; The method of according to traffic demand PVC being optimized again again, based on the method for the traffic engineering (MPLS-TE, Multiprotocol Label Switching Traffic Engineering) of MPLS.Wherein MPLS-TE has become very attracting traffic engineering scheme.
Be worth owing to predict these very high practical applications of MPLS-TE, IT enterprises play an active part in the exploitation based on the traffic engineering prototype system of MPLS, satisfy various networking demands to support perfect MPLS-TE function.
Summary of the invention
For realizing the method for above-mentioned traffic engineering, the present invention aims to provide a kind of traffic engineering prototype system based on MPLS, and this invention can this invention can make the service provider accurately control the path that flow is flowed through.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention realizes through following technical scheme: a kind of traffic engineering prototype system based on MPLS; Comprise the LSP administration module; Said LSP administration module one end connects the MPLS forwarding module, and the other end connects the RSVP-TE signalling module, and said LSP administration module also is connected with the end of CSPF; Be provided with TEDB in the said CSPF, the other end of said CSPF is connected with the ISIS expansion module with OSPF.
This prototype system exploitation hardware environment is an ordinary PC, and test environment is the router of 3 to 5 SR88 models in the laboratory and the SmartBits testing tool of Spirent company.By the backbone network topology that the SR88 router constitutes, the network platform of router operation is the data communication universal Software Platform, and all-router node operation MPLS disposes the traffic engineering based on MPLS based on this topology.
This prototype system realizes on the original MPLS module basis of data communication universal Software Platform.Adopt the C language.Translation and compiling environment is the gcc under the Vmware environment.The version management instrument that uses in the cataloged procedure is Clearcase.
Principle of the present invention is following: based on the traffic engineering prototype system of MPLS, be called for short the MPLS-TE subsystem, this system is a sub-systems of whole M PLS system.It mainly contains 5 parts forms, and the function that each submodule is wherein accomplished is following:
(1) LSP administration module: core component, the charge tunnel interface management, the management of LIB tag library triggers CSPF calculating path information, calculates successfully back triggering signaling protocol and sets up CR-LSP.The LSP administration module is also managed the interface that has enabled MPLS, MPLS TE, comprising: bandwidth, Link color, link cost etc.The TE association attributes of link changes back LSP administration module notice routing subsystem and carries out inundation, upgrades the CSPF LSD.
(2) OSPF/ISIS-TE: link information release module.Through existing Interior Gateway Protocol is expanded; For example in Intermediate System to Intermediate System, introduce new TLV; Perhaps in OSPF, introduce new LSA (LSA; Link State Advertisement), issues the needed link-state information of traffic engineering, comprise maximum link bandwidth, maximum reservable bandwidth, current bandwidth reserved, Link color etc.On each router, the link attribute of maintaining network and topological attribute form traffic engineering database TEDB, utilize TEDB, can calculate the path of satisfying various constraints by the CSPF module.
(3) RSVP-TE: signaling protocol module.On basic RSVP, expand, to support the MPLS traffic engineering.For example distribution of MPLS label etc.
(4) the CSPF:CSPF module is in charge of TEDB, can with oneself be root node calculate based on restriction to the path of purpose network.Promptly calculate an optimal path that satisfies constraint that arrives the destination, tunnel.
(5) MPLS forwarding module: mainly safeguarded the MPLS forwarding database.After the traffic engineering of deployment based on MPLS, in the MPLS forwarding database, generated forwarding-table item.Network traffics can be incorporated into this CR-LSP tunnel.From 3.1 trifles, we know when routing subsystem with optimum route sending-down behind fib table, fib table can be notified the subsystem to MPLS-TE with this route, MPLS-TE attempts setting up LSP.If can set up LSP; The MPLS-TE subsystem can carry a flag bit token value; Promptly go to the NHLFE table item index and the FEC information of destination address and notify back FIB module, the FIB module will be modified as FTN with the list item that originally generated, and then this token value has come into force.If stamped the label value of the corresponding NHLFE list item of token value to the flow of destination address, then need carry out MPLS and transmit, rather than common IP transmitted.
Compared with prior art, the present invention has following beneficial effect:
This invention can make the service provider accurately control the path that flow is flowed through, thereby can avoid congested node, solves a part of path overload, the problem that a part of path is idle; Timing optimization can also be carried out, under the situation of resource anxiety, the bandwidth resources in the CR-LSP tunnel that preempting priority is low etc. can be seized according to priority; Simultaneously can also pass through backup path and fast reroute techniques, under the situation that link or node break down, protection is provided.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows modular structure figure of the present invention
.
Label declaration among the figure: 1, LSP administration module, 2, the MPLS forwarding module, 3, the RSVP-TE signalling module, 4, CSPF, 5, TEDB, 6, the OSPF/ISIS expansion module.
Embodiment
Below with reference to accompanying drawing and combine embodiment, specify the present invention.
Referring to shown in Figure 1; A kind of traffic engineering prototype system based on MPLS comprises LSP administration module 1, and said LSP administration module 1 one ends connect MPLS forwarding module 2; The other end connects RSVP-TE signalling module 3; Said LSP administration module 1 also is connected with the end of CSPF 4, is provided with TEDB 5 in the said CSPF 4, and the other end of said CSPF 4 is connected with ISIS expansion module 6 with OSPF.
The LSP administration module at first judges whether to have enabled CSPF after the submission of receiving the tunnel interface configuration order, if enabled CSPF, then trigger the CSPF module and carry out path computing.The link information that the CSPF module is collected the announcement of OSPF/ISIS expansion module is organized into traffic engineering database TEDB, calculates a shortest path that satisfies constraint according to user's initial conditions again, and the CSPF module returns to the LSP administration module with result calculated.The LSP administration module is announced the RSVP-TE signalling module with the result of path computing again, triggers the signaling aspect simultaneously and sets up the CR-LSP tunnel.
This prototype system exploitation hardware environment is an ordinary PC, and test environment is the router of 3 to 5 SR88 models in the laboratory and the SmartBits testing tool of Spirent company.By the backbone network topology that the SR88 router constitutes, the network platform of router operation is the data communication universal Software Platform, and all-router node operation MPLS disposes the traffic engineering based on MPLS based on this topology.
This prototype system realizes on the original MPLS module basis of data communication universal Software Platform.Adopt the C language.Translation and compiling environment is the gcc under the Vmware environment.The version management instrument that uses in the cataloged procedure is Clearcase.
It is emphasized that; Though above-mentioned facility example is to the present invention's detailed explanation of contrasting, these explanations are just illustrative to the present invention, rather than to the restriction of invention; Any innovation and creation that do not exceed in the connotation of the present invention all drop within the rights protection scope of the present invention.
Claims (1)
1. traffic engineering prototype system based on MPLS; It is characterized in that: comprise LSP administration module (1); Said LSP administration module (1) one end connects MPLS forwarding module (2), and the other end connects RSVP-TE signalling module (3), and said LSP administration module (1) also is connected with the end of CSPF (4); Be provided with TEDB (5) in the said CSPF (4), the other end of said CSPF (4) is connected with ISIS expansion module (6) with OSPF.
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| CN2011103159158A CN102420744A (en) | 2011-10-18 | 2011-10-18 | Traffic engineering prototype system based on MPLS (Multiprotocol Label Switching) |
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| CN2011103159158A CN102420744A (en) | 2011-10-18 | 2011-10-18 | Traffic engineering prototype system based on MPLS (Multiprotocol Label Switching) |
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| CN102420744A true CN102420744A (en) | 2012-04-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103259723A (en) * | 2013-06-05 | 2013-08-21 | 清华大学 | Energy conservation method based on combination of data center network routing and flow preemptive scheduling |
| CN104539623A (en) * | 2015-01-07 | 2015-04-22 | 烽火通信科技股份有限公司 | Achieving system and method for IGP multi-process CSPE in hybrid network |
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| CN1466339A (en) * | 2002-06-24 | 2004-01-07 | ��Ϊ��������˾ | Method for preempting multi-procotol label switching flow controlling band width resource |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103259723A (en) * | 2013-06-05 | 2013-08-21 | 清华大学 | Energy conservation method based on combination of data center network routing and flow preemptive scheduling |
| CN104539623A (en) * | 2015-01-07 | 2015-04-22 | 烽火通信科技股份有限公司 | Achieving system and method for IGP multi-process CSPE in hybrid network |
| CN104539623B (en) * | 2015-01-07 | 2017-11-07 | 烽火通信科技股份有限公司 | IGP agreements multi-process CSPF's realizes system and method in mixed networking |
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Application publication date: 20120418 |