CN107360100A - A kind of network traffics arranging system and method based on SDN technologies - Google Patents

A kind of network traffics arranging system and method based on SDN technologies Download PDF

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Publication number
CN107360100A
CN107360100A CN201710639898.0A CN201710639898A CN107360100A CN 107360100 A CN107360100 A CN 107360100A CN 201710639898 A CN201710639898 A CN 201710639898A CN 107360100 A CN107360100 A CN 107360100A
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network
flow
link
information
idc
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CN201710639898.0A
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CN107360100B (en
Inventor
鞠卫国
程强
张舒
束栋
孙炜
梁雪梅
张云帆
王跃庆
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Jiangsu Posts and Telecommunications Planning and Designing Institute Co Ltd
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Jiangsu Posts and Telecommunications Planning and Designing Institute Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02—Standardisation; Integration
    • H04L41/0213—Standardised network management protocols, e.g. simple network management protocol [SNMP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0893—Assignment of logical groups to network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • H04L43/0882—Utilisation of link capacity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/50—Queue scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/50—Queue scheduling
    • H04L47/58—Changing or combining different scheduling modes, e.g. multimode scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Environmental & Geological Engineering (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The invention discloses a kind of network traffics arranging system and method based on SDN technologies, the present invention relates to a kind of network traffics layout strategy based on software defined network technology, the strategy is based on the analysis to whole network flux and flow direction, composer is cooperateed with to realize the scheduling to flow between different SDN controllers by SDN, meanwhile present invention analysis elaborates to realize the network equipment and framework required for unified flow layout.Strategy proposed by the present invention can not only instruct IDC (Internet Data Center, Internet data center) network traffics scheduling, the unified layout of extensive multiple-domain network flow can also be instructed, network personnel's operation complexity can be substantially reduced simultaneously, improve the utilization rate of network bandwidth resources, the ability of final optimization pass network Agile scheduling and intelligent control, reduces that network bandwidth is newly-built and the cost of dilatation.

Description

A kind of network traffics arranging system and method based on SDN technologies
Technical field
The invention belongs to data communication network field, more particularly to a kind of network traffics arranging system based on SDN technologies and Method.
Background technology
Currently, management of the operator for data communication network is essentially consisted in still based on traditional network management software The management and monitoring of the information of network, in terms of flow scheduling, operator generally use manual setting BGP (Border Gateway Protocol, Border Gateway Protocol) routing policy realization.Conventional way is that operation maintenance personnel signs in and adjusted by hand on router Whole routing policy, change the flux and flow direction of specific transactions, operation is very complicated, and job flow time is grown.
With the introducing of SDN software defined networks (Software Defined Networking, SDN) technology, net is utilized The centralized Control and programmable features of network function, it is possible to achieve the Automatic dispatching of complex network environment down-off.Using SDN's It is to alleviate existing network congestion, ensure the intensive utilization of Internet resources, provide bandwidth that technology, which carries out the scheduling of IP network flow quantity intelligent, The important support means of Consumer's Experience are lifted in the important prerequisite of differentiation operation, and broad band intelligent pipe-line construction.
In specific implementation, each equipment vendors use SDN technologies, realize the centralized Control of the own network equipment, and then Realize the flexible dispatching of flow.But the SDN controllers between different manufacturers can not also realize unified control, the control of producer Device processed can only control oneself equipment.In communication network, vendor equipment is more, and function difference is larger, therefore, how to pass through association Different manufacturers data equipment schedules traffic is adjusted, turns into the difficult point of carrier network O＆M to improve the whole network resource utilization.
Patent application (IDC network egress flow equalizations method of adjustment, equipment based on SDN and be application number 201510157675.1) a kind of IDC network egress flow equalizations method of adjustment, equipment and system based on SDN are proposed, with solution The technical problem of balanced adjustment can not be certainly carried out to IDC network egresses flow in the prior art.But the patent is to be based on single factory The situation of family's equipment is discussed, and is not involved with the collaboration and layout of multi-controller.(one kind is in software defined network for patent application The method of deployment controller, publication number in network：CN105978740.A) by first to the region division of data layer network, then According to the density value of router node in network, it is proposed that a kind of method of the deployment controller in software defined network.Patent Application (a kind of comprehensive unified flow scheduling system and its dispatching method based on SDN, application number：201510720253.0) open A kind of comprehensive unified flow scheduling system and its dispatching method, implementation method based on SDN issue and carry out network to it Equipment control.But the patent can not realize the tuning of flow on backbone traffic export direction, it is not indicated that how realize The equilibrium of flow between connection each link of backbone network.
The content of the invention
Goal of the invention：IDC flows collaboration composer provided by the invention based on SDN, SDN collaboration composers pass through each factory Family's controller obtains the information such as each link utilization of the whole network, carries out the scheduling and arrangement of the whole network flow, realizes that Metropolitan Area Network (MAN), IDC converge Each link that poly- network to backbone network exports realizes the equilibrium of flow.
In order to solve the above-mentioned technical problem, the invention discloses a kind of network traffics arranging system based on SDN technologies, bag Information acquisition module, flow analysis module, routing module and strategy configuration are included with issuing module.
Described information acquisition module is used to gather the facility information of router and the flow information of router；
The flow analysis module parses IP (Internet Protocol, network interconnection to the flow information collected Agreement) header packet information, the source address of clearly each information flow, destination address and affiliated No. AS (autonomous system, Autonomous System), with reference to the facility information of router, strategically setting analyzes route rate of discharge and goes to bone Dry network, the traffic conditions for saving convergence and Metropolitan Area Network (MAN), such as flow accounting, link peak information etc..
The routing module, according to path computing request, is calculated based on network topology, resource status, flow information Path；Router-level topology algorithm should support the constraintss such as bandwidth, node, link, priority, and support the customization of constraints, So as to meet the demand of the flow scheduling of different application scene and optimization.
The strategy configuration is used for according to target call with issuing module, according to link between two or more network or link Loading condition, according to the path computation result of routing module, load balancing, congestion control are carried out to flow.In order to as far as possible The complexity of network traffics adjustment operation and the influence to existing network business are reduced, the main principle of flow adjustment is to exist as far as possible IDC CR outlets carry out Flow-rate adjustment, if not reaching the effect of balanced the whole network flow, then are converged in Metropolitan Area Network (MAN) CR and IDC Network C R carries out the adjustment of flux and flow direction.
Described information acquisition module gathers the facility information of router, including：SDN collaboration composers are connect using SNMP (letters Single NMP, Simple Network Management Protocol) agreement collection router facility information, bag Network node, interface type, physical link, port address information are included, the facility information supports inquiry to report and trigger renewal, I.e. by southbound interface detection network state, it is found that when topology changes (such as newly-increased or dismounting link), SDN collaborations are reported to compile Arrange device.SNMP is the basic management agreement of computer network, gathers the information of needs and can be configured in front-end interface, collection knot Fruit is written in database.
Due to being related to more producer's routers, therefore system should support various agreements to be obtained from different manufacturers router Take flow information.Described information acquisition module supports two or more agreements, and the agreement includes NETFLOW agreements, SFLOW is assisted Negotiation NetStream agreements.
Described information acquisition module gathers the flow information of router, including：Good connection control is configured on router device The IP and port numbers of device processed, each router active transmitted traffic information is into the server of information acquisition module, server master It is used to receive the various information that each router is sent, such as the information of status information of equipment, bearer traffic, link information etc. The processing being formatted Deng, information acquisition module for the various information that receive, is then sent to database server.Number Include data access and more new management, data integrity management and data security management, Yi Jiyi according to the function of storehouse server A little data processing functions, such as data are stored respectively by class.
Implement flow scheduling strategy and be divided into two classes, one kind is the scheduling based on source address or source address set, another kind of to be Based on destination address or destination address set, purpose AS scheduling.
The system also includes traffic visualization module, and the traffic visualization module is used for districts and cities' IDC network topologies Unified presentation, and token network node running situation and link connection situation, display IDC core route rates of discharge.Together When, regular maintenance can be carried out using topology, such as check alarm, check flow, beaching accommodation etc..
The invention also discloses a kind of network traffics method of combination based on SDN technologies, comprise the following steps：
Step 1, count the whole network node CR (Core Router, core route) flow and flow to situation, and each bar chain The resource service condition on road；
Step 2, when districts and cities IDC occur new flow increasing when, judge new flow increasing whether specified circuit by if it is, pressing Terminated according to specified circuit by placement flow, flow；Otherwise step 3 is entered；
Step 3, each direct connected link resource service condition { L is counted1,L2,·········,Ln, and calculate chain The standard deviation α of road utilization rate, to there is a quantitative judgement to link use state.Standard deviation criteria α is mainly used in judging The size of the mutual utilization rate difference of multilink, standard deviation α is smaller, represents these link utilizations and is closer to, just Difference is bigger, represents that the utilization rate difference of these links is larger, and flow needs to adjust and imitated so as to the use of balanced link between link Rate.Standard deviation α calculation formula is as follows.
Wherein, LiThe resource utilization of i-th direct-connected backbone network outbound is represented, i.e., occupied bandwidth accounts for the total band of link Wide ratio；N represents the quantity of direct-connected backbone network outbound.
Step 4, count districts and cities' IDC Exit Roads by it is middle be possible to by direct-connected backbone network export link, calculate will New flow increasing is placed on standard deviation α when on direct connected linkm, it is designated as { α1,α2,·········,αM(M is represented IDC Exit Roads are by total quantity), choose the direct connected link wherein corresponding to minimum value and exported as newly-increased route into backbone network Link；Step 5, if districts and cities IDC is joined directly together with the direct connected link chosen in step 4, new flow increasing is placed on chain Lu Shang, path are selected, and flow terminates.Otherwise intermediate node corresponding to the direct connected link is recorded, into step 6.
Step 6, the path of the new flow increasings of districts and cities IDC is that districts and cities IDC is to intermediate node, then arrives the direct connected link selected, Path is selected, and flow terminates.
Beneficial effect：The invention belongs to network communication technology field, especially belongs to software defined network field.Using this hair Bright methods described and device, careful retouch is carried out to how to carry out the adjustment of network traffics and layout under SDN framework State, optimize whole network link circuit resource utilization rate, while substantially reduce network personnel's operation complexity, final optimization pass network is quick to be adjusted Degree and the ability of intelligent control, reduce that network bandwidth is newly-built and the cost of dilatation.
Brief description of the drawings
The present invention is done with reference to the accompanying drawings and detailed description and further illustrated, it is of the invention above-mentioned or Otherwise advantage will become apparent.
Fig. 1 is SDN present situation.
Fig. 2 is carrier ID C network diagrams.
Fig. 3 is that the IDC flows based on SDN cooperate with composer structural representation.
Fig. 4 is the connection between SDN collaboration composers and manufacturer's SDN controllers.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention will be further described.
The present invention relates to a kind of IDC network traffics arranging system based on SDN technologies and strategy, belong to the network communications technology Field, especially belong to software defined network field.The present invention focuses on the flow direction by adjusting different districts and cities IDC flows, and then The resource utilization of balanced each link of the whole network, network entirety resource utilization is improved, while analysis elaborates to realize unified flow Network equipment and framework required for layout.
As shown in figure 3, the invention discloses a kind of network traffics arranging system based on SDN technologies, including information gathering Module, flow analysis module, routing module and strategy configure and issue module,
Described information acquisition module is used to gather the facility information of router and the flow information of router；
The flow analysis module parses IP header packet informations, the source of clearly each information flow to the flow information collected Address, destination address and affiliated No. AS (autonomous system, Autonomous System), with reference to the facility information of router, Strategically setting analyzes route rate of discharge and goes to backbone network, saves the traffic conditions of convergence and Metropolitan Area Network (MAN)；Such as flow Measure accounting, link peak information etc..
The routing module, according to path computing request, is calculated based on network topology, resource status, flow information Path；Router-level topology algorithm should support the constraintss such as bandwidth, node, link, priority, and support the customization of constraints, So as to meet the demand of the flow scheduling of different application scene and optimization.
The strategy configuration is used for according to target call with issuing module, according to link between two or more network or link Loading condition, according to the route of calculating, load balancing, congestion control are carried out to flow.In order to reduce network traffics as far as possible The complexity of operation and the influence to existing network business are adjusted, the main principle of flow adjustment is to be exported as far as possible in IDC CR Flow-rate adjustment is carried out, if not reaching the effect of balanced the whole network flow, then is flowed in Metropolitan Area Network (MAN) CR and IDC aggregation networks CR Measure the adjustment of flow direction.
Described information acquisition module gathers the facility information of router, including：SDN collaboration composers are connect using SNMP (letters Single NMP, Simple Network Management Protocol) agreement collection router facility information, bag Network node, interface type, physical link, port address information are included, the facility information supports inquiry to report and trigger renewal, I.e. by southbound interface detection network state, it is found that when topology changes (such as newly-increased or dismounting link), SDN collaborations are reported to compile Arrange device.SNMP is the basic management agreement of computer network, gathers the information of needs and can be configured in front-end interface, collection knot Fruit is written in database.
Due to being related to more producer's routers, therefore system should support various agreements to be obtained from different manufacturers router Take flow information.Described information acquisition module supports two or more agreements, and the agreement includes NETFLOW agreements, SFLOW is assisted Negotiation NetStream agreements.
Described information acquisition module gathers the flow information of router, including：Good connection control is configured on router device The IP and port numbers of device processed, each router active transmitted traffic information to server, each router active transmitted traffic information arrive Server, herein, data acquisition server are mainly used in receiving each router and send various new, such as equipment state letter Breath, the information of bearer traffic, link information etc., the processing being formatted for the various information received, then send To database server.The function of database server includes data access and more new management, data integrity management and data Security management, and some data processing functions, such as data are stored respectively by class.
Due to being related to more producer's routers, therefore system should support various agreements to be obtained from different manufacturers router Take flow information.Described information acquisition module supports two or more agreements, and the agreement includes NETFLOW agreements, SFLOW is assisted Negotiation NetStream agreements.
Implement flow scheduling strategy and be divided into two classes, one kind is the scheduling based on source address or source address set, another kind of to be Based on destination address or destination address set, purpose AS scheduling.
The system also includes traffic visualization module, and the traffic visualization module is used for districts and cities' IDC network topologies Unified presentation, and token network node running situation and link connection situation, display IDC core route rates of discharge.Together When, regular maintenance can be carried out using topology, such as check alarm, check flow, beaching accommodation etc..
The invention also discloses a kind of network traffics method of combination based on SDN technologies, comprise the following steps：
Step 1, count the whole network node CR flow and flow to situation, and the resource service condition of each bar link；
Step 2, when districts and cities IDC occur new flow increasing when, judge new flow increasing whether specified circuit by if it is, pressing Terminated according to specified circuit by placement flow, flow；Otherwise step 3 is entered；
Step 3, each direct connected link resource service condition { L is counted1,L2,·········,Ln, and calculate profit With the standard deviation α of rate, to there is a quantitative judgement to link use state.Standard deviation criteria α is mainly used in judging a plurality of The size of the mutual utilization rate difference of link, standard deviation α is smaller, represents these link utilizations and is closer to, mean square deviation is got over Greatly, it is larger to represent the utilization rate difference of these links, flow needs to adjust so as to the service efficiency of balanced link between link.Mark Accurate poor α calculation formula is as follows.
Wherein, LiThe resource utilization of i-th direct-connected backbone network outbound is represented, i.e., occupied bandwidth accounts for the total band of link Wide ratio；N represents the quantity of direct-connected backbone network outbound.
Step 4, count districts and cities' IDC Exit Roads by it is middle be possible to by direct-connected backbone network export link, calculate will New flow increasing is placed on standard deviation α when on direct connected linkm, it is designated as { α1,α2,·········,αM(M is represented IDC Exit Roads are by total quantity), choose the direct connected link wherein corresponding to minimum value and exported as newly-increased route into backbone network Link；Step 5, if IDC is joined directly together with the direct connected link, new flow increasing is placed on link, path is selected, stream Journey terminates.Otherwise intermediate node corresponding to the direct connected link is recorded, into step 6.
Step 6, the path of the new flow increasings of IDC is, the direct connected link for IDC- intermediate nodes-select.Path is selected, flow Terminate.
Embodiment
Fig. 2 illustrates the typical connection of telecom operators' IDC networks, it is however generally that districts and cities IDC is exported by three sides To respectively Metropolitan Area Network (MAN) direction, IDC aggregation networks direction and direct-connected backbone network export direction.Backbone network rate of discharge is main Come from IDC flows and Metropolitan Area Network (MAN) flow.The IDC of some districts and cities only has both direction, i.e. Metropolitan Area Network (MAN) direction and IDC aggregation networks Direction (being as shown in Figure 1 SDN present situation).By link by whether direct-connected backbone network is divided into two classes：
Direct connected link：
The direct-connected backbone network outbounds of IDC, such as L3, L4, L5, L6；
The direct-connected backbone network outbound of Metropolitan Area Network (MAN), such as L1, L2, L9, L10；
The direct-connected backbone network outbound of IDC aggregation networks, such as L7, L8；
Non-straight connected link：
The link of IDC connection Metropolitan Area Network (MAN)s and IDC aggregation networks, such as d1, d2, d3, d4, d5, d6, d7, d8；
The complexity operated and the influence to existing network business, flow adjustment are adjusted in order to reduce network traffics as far as possible Main principle be as far as possible IDC CR outlet carry out Flow-rate adjustment, if do not reach the effect of balanced the whole network flow, then The adjustment of flux and flow direction is carried out in Metropolitan Area Network (MAN) CR and IDC aggregation networks CR.
As shown in figure 3, the IDC network traffics layout scheduling strategies provided by the invention based on SDN technologies are as follows：
Step 1, count the whole network node CR flow and flow to situation, and the resource service condition of each bar link；
Step 2, when districts and cities IDC occur new flow increasing when, judge new flow increasing whether specified circuit by if it is, pressing Terminated according to specified circuit by placement flow, flow；Otherwise step 3 is entered；
Step 3, each direct connected link resource service condition { L is counted1,L2,·········,Ln, and calculate profit With the standard deviation α of rate, to there is a quantitative judgement to link use state.Standard deviation criteria α is mainly used in judging a plurality of The size of the mutual utilization rate difference of link, standard deviation α is smaller, represents these link utilizations and is closer to, mean square deviation is got over Greatly, it is larger to represent the utilization rate difference of these links, flow needs to adjust so as to the service efficiency of balanced link between link.Mark Accurate poor α calculation formula is as follows.
Wherein, LiThe resource utilization of i-th direct-connected backbone network outbound is represented, i.e., occupied bandwidth accounts for the total band of link Wide ratio；N represents the quantity of direct-connected backbone network outbound；
Step 4, count IDC Exit Roads by it is middle be possible to by the link that exports of direct-connected backbone network, calculating will be newly-increased Flow is placed on standard deviation α when on direct connected linkm, it is designated as { α1,α2,·········,αM(M represents IDC and gone out Mouth route total quantity), choose chain of the direct connected link wherein corresponding to minimum value as newly-increased route into backbone network outlet Road.
Step 5, if IDC is joined directly together with the direct connected link, new flow increasing is placed on link, path is selected, Flow terminates.Otherwise intermediate node corresponding to the direct connected link is recorded, into step 6.
Step 6, the path of the new flow increasings of IDC is, the direct connected link for IDC- intermediate nodes-select.Path is selected, flow Terminate.
IDC flows collaboration composer provided by the invention based on SDN, SDN collaboration composers pass through each producer's controller The information such as each link utilization of the whole network are obtained, the scheduling and arrangement of the whole network flow is carried out, realizes Metropolitan Area Network (MAN), IDC aggregation networks extremely Each link of backbone network outlet realizes the equilibrium of flow.The specific module of system includes：
Information gathering：Information gathering includes two parts, first, SDN collaborations composer is directly each using snmp protocol collection The facility information of individual router, including the information such as network node, interface type, physical link, port address, the information should prop up Hold inquiry and report and trigger renewal, i.e., by southbound interface detection network state, it is found that topology is changed (as increased or removing link newly Deng) when, be reported to SDN to cooperate with composer in time.SNMP is the basic management agreement of computer network, and the information for gathering needs can Configured in front-end interface, collection result is written in database.
Another is the flow information from router, and due to being related to more producer's routers, therefore system should be supported Various agreements so as to from different manufacturers router obtain flow information.The agreement of main flow includes NETFLOW agreements, SFLOW agreements And NetStream agreements.The IP and port numbers of connection controller are configured on router device, each router can actively be sent out Flow information is sent to server.Server writes local directory, the database write-in process poll catalogue after accepting information parsing By batch data write into Databasce server.SDN collaborations composer can inquire about correlative flow by entering database server Information.
Flow analysis：For the flow collected, IP header packet informations, source address, the purpose of clearly each information flow are parsed Address and affiliated No. AS (autonomous system, Autonomous System).With reference to route-map, strategically setting point Route rate of discharge is separated out to go to backbone network, save the traffic conditions of convergence and Metropolitan Area Network (MAN), such as flow accounting, link peak Information etc..
Traffic visualization：System can be realized to be presented to the unified of multiple districts and cities IDC network topologies, can be with accurate marker net Network node running situation and link connection situation, it can show that IDC cores route rate of discharge.Meanwhile topology can be utilized Regular maintenance is carried out, such as checks alarm, check flow, beaching accommodation etc..
Routing module：Routing module is the core of intelligent flow scheduling controlling layer.Flow path is calculated with network topology, money Based on the information such as source state, flow, according to path computing request, the path for meeting constraints is calculated.Router-level topology algorithm The constraintss such as bandwidth, node, link, priority should be supported, and support the customization of constraints, so as to meet different application field The flow scheduling of scape and the demand of optimization.
Strategy configuration is with issuing module：According to target call, creation method template.According to chain between multiple network/links Road loading condition, according to default strategy, load balancing, congestion control etc. are carried out to flow.Flow scheduling strategy is according to reality Need to be divided into two classes, one kind is the scheduling based on source address (or source address set), and another kind of is based on destination address (or purpose Address set, purpose AS) scheduling.
For setting of the flow layout strategy with cooperateing with composer of above-mentioned offer, as shown in figure 3, cooperateing with layout for SDN Connection between device and manufacturer's SDN controllers, the present invention are illustrated.By taking Fig. 2 as an example, such as the IDC sections of districts and cities -2 Point has two core routers, C3 and C4, and the link (d7, d8) that C4 has two indirectly connected backbone network outlets is connected to Metropolitan Area Network (MAN) N3 N2 nodes are converged with IDC.When new flow increasing occurs in C4, if not specifying good route for flow, statistics first is possible to Route in direct connected link utilization rate situation, all routes include：
(1) it route 1：d7-L7
(2) 2 are route：d7-L8
(3) 3 are route：d8-L9
(4) 4 are route：d8-L10
Calculate the standard deviation that link set { L7, L8, L9, L10 } utilizes and be designated as α, then calculate newly-increased route and dispose respectively Standard deviation α at direct connected link { L7, L8, L9, L10 }m, it is final IDC to select the link corresponding to the standard deviation of minimum Direct connected link corresponding to new flow increasing, is exemplified as L10.Because IDC and the direct connected link are not joined directly together, then the road comprising L10 By routeing 4：D8-L10, complete the selection of link.
The invention provides a kind of network traffics arranging system and method based on SDN technologies, the technical side is implemented The method and approach of case are a lot, and described above is only the preferred embodiment of the present invention, it is noted that for the art For those of ordinary skill, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvement Protection scope of the present invention is also should be regarded as with retouching.The available prior art of each part being not known in the present embodiment is subject to Realize.

Claims (7)

1. a kind of network traffics arranging system based on SDN technologies, it is characterised in that including information acquisition module, flow analysis Module, routing module and strategy configure and issue module,
Described information acquisition module is used to gather the facility information of router and the flow information of router；
The flow analysis module parses IP header packet informations to the flow information that collects, the source address of clearly each information flow, Destination address and affiliated No. AS, with reference to the facility information of router, before strategically setting analyzes route rate of discharge Toward the traffic conditions of backbone network, province's convergence and Metropolitan Area Network (MAN)；
The routing module, according to path computing request, calculates path based on network topology, resource status, flow information；
The strategy configuration is with issuing module according to target call, according to link load feelings between two or more network or link Condition, according to the path computation result of routing module, load balancing, congestion control are carried out to flow.
2. system according to claim 1, it is characterised in that the equipment letter of described information acquisition module collection router Breath, including：SDN collaboration composers connect the facility information using snmp protocol collection router, including network node, interface class Type, physical link, port address information, the facility information are supported inquiry to report and trigger renewal, i.e., visited by southbound interface Network state is surveyed, it is found that when topology changes, is reported to SDN to cooperate with composer.
3. system according to claim 1, it is characterised in that described information acquisition module supports two or more agreements, The agreement includes NETFLOW agreements, SFLOW agreements and NetStream agreements.
4. system according to claim 3, it is characterised in that the flow letter of described information acquisition module collection router Breath, including：Into the server of information acquisition module, the server is mainly used in receiving each router active transmitted traffic information The various information that each router is sent, including the information of status information of equipment, bearer traffic, link information, information gathering mould The processing that block is formatted for the various information that receive, is then sent to database server, and database server is used In data access and more new management, data integrity management and data security management.
5. system according to claim 1, it is characterised in that implement flow scheduling strategy and be divided into two classes, one kind is to be based on Source address or the scheduling of source address set, another kind of is based on destination address or destination address set, purpose AS scheduling.
6. system according to claim 1, it is characterised in that also including traffic visualization module, the traffic visualization Module is used to the unified of districts and cities' IDC network topologies be presented, and token network node running situation and link connection situation, shows Show that IDC cores route rate of discharge.
7. a kind of network traffics method of combination based on SDN technologies, it is characterised in that comprise the following steps：
Step 1, count the whole network joint core route CR flow and flow to situation, and the resource service condition of each bar link；
Step 2, when districts and cities IDC occur new flow increasing when, judge new flow increasing whether specified circuit by if it is, according to finger Fixed route places flow, and flow terminates；Otherwise step 3 is entered；
Step 3, each direct connected link resource service condition { L is counted1,L2,………,LN, and calculate the standard deviation α of link utilization：
<mrow> <mi>&amp;alpha;</mi> <mo>=</mo> <msqrt> <mrow> <mfrac> <mn>1</mn> <mi>N</mi> </mfrac> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>N</mi> </munderover> <msup> <mrow> <mo>(</mo> <msub> <mi>L</mi> <mi>i</mi> </msub> <mo>-</mo> <mi>&amp;mu;</mi> <mo>)</mo> </mrow> <mn>2</mn> </msup> </mrow> </msqrt> <mo>,</mo> <mi>&amp;mu;</mi> <mo>=</mo> <mfrac> <mn>1</mn> <mi>N</mi> </mfrac> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>1</mn> </mrow> <mi>N</mi> </munderover> <msub> <mi>L</mi> <mi>i</mi> </msub> </mrow>
Wherein, LiThe resource utilization of i-th direct-connected backbone network outbound is represented, i.e., occupied bandwidth accounts for link total bandwidth Ratio；N represents the quantity of direct-connected backbone network outbound.
Step 4, count districts and cities' IDC Exit Roads by it is middle be possible to by the link that exports of direct-connected backbone network, calculating will be newly-increased Flow is placed on standard deviation α when on direct connected linkm, it is designated as { α1,α2,………,αM, (M represents IDC Exit Roads by total number Amount), choose the link that the direct connected link wherein corresponding to minimum value enters backbone network outlet as newly-increased route；
Step 5, if districts and cities IDC is joined directly together with the direct connected link chosen in step 4, new flow increasing is placed on link On, path is selected, and flow terminates, and intermediate node corresponding to the direct connected link is otherwise recorded, into step 6；
Step 6, the path of the new flow increasings of districts and cities IDC is that districts and cities IDC is to intermediate node, then arrives the direct connected link selected, path Selected, flow terminates.
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