CN105610714B - The control method and device and SDN controller of SDN network - Google Patents
The control method and device and SDN controller of SDN network Download PDFInfo
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- 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
- H04L41/04—Network management architectures or arrangements
- H04L41/042—Network management architectures or arrangements comprising distributed management centres cooperatively managing the network
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- 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
- H04L41/04—Network management architectures or arrangements
- H04L41/044—Network management architectures or arrangements comprising hierarchical management structures
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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
- H04L45/12—Shortest path evaluation
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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
- H04L45/302—Route determination based on requested QoS
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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
- H04L45/302—Route determination based on requested QoS
- H04L45/306—Route determination based on the nature of the carried application
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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
- H04L45/38—Flow based routing
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Abstract
The present invention relates to a kind of control method of SDN network and device and SDN controllers, it is the network information for receiving each forwarding device in SDN network and sending, service resources request is received, carry out business identification is requested to service resources, service resources is obtained and requests corresponding service identification and resource identification；Optimal data forward-path is obtained according to service identification, resource identification and the network information and is converted into the forwarding strategy of forwarding device, flow table information is converted by forwarding strategy again, it is sent to corresponding forwarding device, forwarding device can be so controlled and carry out data forwarding.In the present solution, not only realizing the business identification to service resources request, but also forwarding Internet resources are efficiently and accurately collected in the network SDN of limited resources, realize and centralized processing and efficiently control are carried out to limited network resources.
Description
Technical field
The present invention relates to network control technology fields, control method and device more particularly, to a kind of SDN network and
SDN controller.
Background technique
In recent years, for SDN as a kind of emerging software-based network architecture technology, maximum feature is there is pine
The control plane and data plane of coupling, realize bottom-layer network facility to upper layer application at the network state control for supporting centralization
It is transparent.It has flexible software programmability, so that the automatic management of network and control ability obtain unprecedented mention
It rises, can effectively solve the problem that the resource extent extension that current network systems are faced is limited, networking flexibility is poor, is difficult to quickly meet
The problems such as business demand.
In current SDN technology, the business of different field leads to the side for applying for resource there are different business demands and characteristic
Formula difficulty has unified standard, interconnection, government and enterprises' network, telecommunication carrier networks, Internet service between data center, data center
The fields such as deployment need extensive customization application, and not high to the utilization efficiency of Internet resources in the limited network of bandwidth.
Summary of the invention
Based on this, it is necessary to for the not high problem of the limited efficient network resource usage of bandwidth, provide a kind of SDN network
Control method and device and SDN controller.
A kind of control method of SDN network, comprising the following steps:
The network information that each forwarding device in SDN network is sent is received, service resources request is received；
Service resources request is identified, service resources is obtained and requests corresponding service identification, and according to service resources
The corresponding resource identification of request；
Optimal data forward-path is obtained according to service identification, resource identification and the network information, and optimal data is turned
Hair path is converted into the forwarding strategy of each forwarding device in optimal data forward-path；
Corresponding flow table information is converted by each forwarding strategy, each flow table information is sent to corresponding forwarding respectively and is set
It is standby.
A kind of SDN controller, including receiving unit, recognition unit, control unit and transmission unit；
Receiving unit is used to receive the network information that each forwarding device in SDN network is sent, and receives service resources request；
For recognition unit for identifying to service resources request, acquisition service resources request corresponding service identification, and
According to the corresponding resource identification of service resources request；
Control unit is used to obtain optimal data forward-path according to service identification, resource identification and the network information, and
Convert optimal data forward-path to the forwarding strategy of each forwarding device in optimal data forward-path；
Transmission unit is used to by each forwarding strategy convert corresponding flow table information, is respectively sent to each flow table information pair
The forwarding device answered.
According to the scheme of aforementioned present invention, it is the network information for receiving each forwarding device in SDN network and sending, receives
Service resources request requests carry out business identification to service resources, obtains service resources and requests corresponding service identification and resource
Mark；Optimal data forward-path is obtained according to service identification, resource identification and the network information and is converted into forwarding device
Forwarding strategy, then flow table information is converted by forwarding strategy, it is sent to corresponding forwarding device, forwarding can be so controlled and set
It is standby to carry out data forwarding.In the present solution, not only realizing the business identification to service resources request, but also in limited resources
Efficiently and accurately collection network resource, realization carry out centralized processing and efficiently control to limited network resources in the network SDN.
A kind of control device of SDN network, including junior's SDN controller, junior's SDN controller include receiving unit,
One retransmission unit, recognition unit, judging unit and transmission unit；
The network that receiving unit is used to receive in SDN network with the associated each forwarding device transmission of junior's SDN controller is believed
Breath receives service resources request；
First retransmission unit is used to the network information being forwarded to center SDN controller；
For recognition unit for identifying to service resources request, acquisition service resources request corresponding service identification, and
According to the corresponding resource identification of service resources request；
Judging unit is for judging resource identification whether in the network information, if it is not, then the first retransmission unit is by business mark
Know, resource identification is forwarded to center SDN controller；
First retransmission unit is also used to receive in the optimal data forward-path of center SDN controller transmission and junior SDN
The forwarding strategy of the associated each forwarding device of controller；Wherein, optimal data forward-path is center SDN controller according to business
What mark, resource identification and the network information obtained, each forwarding strategy is center SDN controller according to optimal data forward-path
What conversion obtained；
Transmission unit is used to by each forwarding strategy convert corresponding flow table information, respectively by each flow table information be sent to
The associated corresponding forwarding device of junior's SDN controller.
A kind of control device of SDN network, which is characterized in that including center SDN controller, center SDN controller includes
Second retransmission unit and control unit；
Second retransmission unit is used to receive the network information, service identification and resource identification that each junior SDN controller is sent；
Control unit is used to obtain optimal data forward-path according to service identification, resource identification and the network information, and
Convert optimal data forward-path to the forwarding strategy of each forwarding device in optimal data forward-path；
Second retransmission unit is also used to set in optimal data forward-path with the associated each forwarding of each junior SDN controller
Standby forwarding strategy is respectively sent to corresponding each junior SDN controller；Each forwarding device in optimal data forward-path closes
Received each forwarding strategy is converted corresponding flow table information by each junior SDN controller of connection, respectively will be with the junior
The associated flow table information of SDN controller is sent to and the associated corresponding forwarding device of junior SDN controller.
It is using distributed multi-stage management mode, through center SDN controller under according to the scheme of aforementioned present invention
The data forwarding of grade SDN controller co- controlling forwarding device, the control of junior's SDN controller and junior's SDN controller are associated
Forwarding device, when the service resources that junior's SDN controller receives request corresponding resource identification not connect in junior's SDN controller
When in the network information that the forwarding device that is associated received is sent, just corresponding service identification and resource identification are forwarded to
Heart SDN controller obtains optimal data forward-path by center SDN controller, and is converted into the forwarding strategy of forwarding device, sends out
It send to corresponding each junior SDN controller, forwarding strategy is converted corresponding flow table information by each junior SDN controller, then sends out
Send to the associated corresponding forwarding device of each junior SDN controller.This distributed multi-stage management mode largely subtracts
The light load pressure of SDN controller, also provides convenience for the authority distribution of the network user, district management.
Detailed description of the invention
Fig. 1 is the flow diagram of the control method of SDN network in one embodiment；
Fig. 2 is the structural schematic diagram of SDN controller in one embodiment；
Fig. 3 is the schematic diagram of the logical architecture of SDN controller in one embodiment；
Fig. 4 is the application schematic diagram of SDN controller in one embodiment；
Fig. 5 is the schematic diagram of resource request process in one embodiment；
Fig. 6 is the schematic diagram that SDN controller issues flow table information to forwarding device in one embodiment；
Fig. 7 is the structural schematic diagram of the control device of SDN network in one embodiment；
Fig. 8 is the structural schematic diagram of the control device of SDN network in one embodiment；
Fig. 9 is the structural schematic diagram of the control device of SDN network in one embodiment；
Figure 10 is the structural schematic diagram of the control device of SDN network in one embodiment.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, with reference to the accompanying drawings and embodiments, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only used to explain the present invention,
And the scope of protection of the present invention is not limited.
It is shown in Figure 1, it is the embodiment of the control method of SDN network of the invention.SDN network in the embodiment
Control method includes the following steps:
Step S101: the network information that each forwarding device in SDN network is sent is received, service resources request is received；
Step S102: identifying service resources request, the corresponding service identification of acquisition service resources request, and according to
The corresponding resource identification of service resources request；
Step S103: optimal data forward-path is obtained according to service identification, resource identification and the network information, and will most
Excellent data forwarding paths are converted into the forwarding strategy of each forwarding device in optimal data forward-path；
Step S104: corresponding flow table information is converted by each forwarding strategy, each flow table information is sent to correspondence respectively
Forwarding device.
According to the scheme of aforementioned present invention, it is the network information for receiving each forwarding device in SDN network and sending, receives
Service resources request requests carry out business identification to service resources, obtains service resources and requests corresponding service identification and resource
Mark；Optimal data forward-path is obtained according to service identification, resource identification and the network information and is converted into forwarding device
Forwarding strategy, then flow table information is converted by forwarding strategy, it is sent to corresponding forwarding device, forwarding can be so controlled and set
It is standby to carry out data forwarding.In the present solution, not only realizing the business identification to service resources request, but also in limited resources
Efficiently and accurately the centralized processing of limited network resources is managed in collection network resource, realization with efficient in SDN network.
Optimal data forwarding is obtained according to service identification, resource identification and the network information in one of the embodiments,
The step of path the following steps are included:
According to service identification, resource identification and the network information, optimal number is obtained using controlled shortest path first
According to forward-path.
In the present embodiment, use controlled shortest path first that can provide multi-constraint condition for the network user most
Good path computing improves network resource utilization.
In one of the embodiments, obtain service resources request corresponding service identification the step of the following steps are included:
According to the characteristic that service resources are requested, the service identification of quintuple form, the service identification of quintuple form are obtained
Including source address, source port, destination address, destination port and protocol type.
In the present embodiment, according to five yuan of source address, source port, destination address, destination port and protocol type composition
Group service identification can preferably identify the business demand in service resources request, but be not limited to quintuple form.
In one of the embodiments, SDN network be cable network, it is wireless network, wire and wireless hybrid network, military logical
Communication network etc..
In the present embodiment, the control method of SDN network can be applied to the limited finite element network of bandwidth, wireless network with
And including wireless, wired hybrid network, it can be applied in military communication network, have a wide range of application.
The network information includes the network information or network dynamic that each forwarding device is initially sent in one of the embodiments,
The network information sent when update.It is updated by network dynamic, the accuracy of the network information can be improved, so that it is guaranteed that can obtain
Take optimal data forward-path.The content of the network information include forwarding device information, network topological information, forwarding device port and
Wirelessly or non-wirelessly transmission mode information, the bit error rate and data traffic statistics of port association etc..
According to the control method of above-mentioned SDN network, the present invention also provides a kind of SDN controllers, below with regard to SDN of the invention
The embodiment of controller is described in detail.
It is shown in Figure 2, it is the embodiment of SDN controller of the invention.SDN controller in the embodiment includes receiving
Unit 201, recognition unit 202, control unit 203 and transmission unit 204；
Receiving unit 201 is used to receive the network information that each forwarding device in SDN network is sent, and receives service resources and asks
It asks；
For recognition unit 202 for identifying to service resources request, acquisition service resources request corresponding service identification,
And according to the corresponding resource identification of service resources request；
Control unit 203 is used to obtain optimal data forward-path according to service identification, resource identification and the network information,
And convert optimal data forward-path to the forwarding strategy of each forwarding device in optimal data forward-path；
Transmission unit 204 is used to convert corresponding flow table information for each forwarding strategy, respectively sends each flow table information
To corresponding forwarding device.
The network information includes the network information and network dynamic that each forwarding device is initially sent in one of the embodiments,
The network information sent when update.
The content of the network information includes that forwarding device information, network topological information, forwarding are set in one of the embodiments,
Wirelessly or non-wirelessly transmission mode information, the bit error rate, the data flux statistics information of standby port and port association.
In a specific embodiment, the logical architecture of SDN controller is as shown in figure 3, its logical function partition is four
Layer, is successively basic service layer, information receiving and transmitting layer, network core control layer, resource service layer, each layer concrete function from the bottom to top
It is described below:
1, basic service layer
Involved in the layer is mainly provided during operating system adaptation, master tool and SDN controller function are realized
Third-party library, such as the library GSOAP, Net-SNMP, OpenFlow, CSPF can need to add according to controller actual functional capability
Corresponding library.
2, information receiving and transmitting layer
The layer mainly provides northbound interface, southbound interface, East and West direction interface and center SDN controller and junior SDN is controlled
Data exchange interface (CSDSI, Center Service and Subordinate Service Data Swap between device
Interface information receiving and transmitting), treatment mechanism.Message is extensive concept herein, logical including but not limited to protocol data, message
Letter etc..Northbound interface is the interface that SDN controller is provided to application program, and RESTAPI and SOAP are the realization sides of current main-stream
Method；Southbound interface is SDN controller core technology place, and the interface protocol of current main-stream has OpenFlow and I2RS etc., is used for
It is interacted between SDN controller and forwarding device.Above-mentioned receiving unit 201 and transmission unit 204 are in information receiving and transmitting layer.
3, network core control layer
The layer mainly provides network resource information unified management, provides for the identified business of resource service layer based on mostly about
The functions such as the optimum path calculation of beam condition and management, the forwarding strategy generation of forwarding device.Above-mentioned control unit 203 is in network
In core control layer.
4, resource service layer
The layer is mainly that concrete application provides network management agent, business identification, service resources policy control and database adaptation
Etc. functions.Above-mentioned recognition unit 202 is in resource service layer.
Under the SDN network environment of limited resources, one-level management shown in Fig. 4 is distributed multi-stage management in network size
Application scenarios when smaller, by taking this network as an example, the specific implementation process of the SDN controller of the invention based on hybrid network is such as
Under:
1, in network the information such as forwarding device, topology, port and its wireless transmission means of binding collection, management.SDN
Controller is subscribed to, is collected, handled according to extension OpenFlow agreement by the forwarding device Messenger of information receiving and transmitting layer
The network forwarding equipment administered initially reports its information of interest reported when updating with network dynamic, and in network core
The traffic engineering management submodule of control layer manages the limited resources of SDN network concentratedly.
2, resource service layer carries out business identification to business.Service resources applicant sends service resources to resource service layer
Request is requested as shown in figure 5, resource service layer receives service resources by northbound interface, according to business feature, Qos, constraint item
The specific requirements such as part form five-tuple but are not limited to the service identification of quintuple form, can also carry out to service resources application
Pretreatment, such as MPLS, IP and Router ID conversion, obtain service resources mark, then by the service identification of resource request and
Internet resources needed for resource identification turns to the forwarding control submodule application business of network core control layer.
3, network core control layer is on the basis of the current network flow engineering information of collection according to the money of business application
Source calculates optimum data forward-path for it, and converts it into the forwarding strategy of related forwarding device, is subsequently sent to
Information receiving and transmitting layer.SDN controller is to forwarding device information, network topological information, network forwarding equipment port and port association
The information such as wireless transmission means, the bit error rate, traffic statistics are collected and are managed collectively, and utilize controlled shortest path first
(CSPF, Constrained Shortest Path First) algorithm is that business calculates optimal path, is improving Internet resources benefit
Under the premise of with rate, the functions such as optimum path calculation, management, forwarding strategy generation for providing multi-constraint condition for the network user.
4, information receiving and transmitting layer is after the forwarding strategy for receiving network core control layer, and southbound interface is according to extension
The corresponding flow table information of OpenFlow protocol translation, is handed down to forwarding device involved in path, as shown in Figure 6.
SDN controller of the invention is corresponding with the control method of SDN network of the invention, in the control of above-mentioned SDN network
The technical characteristic and its advantages that the embodiment of method processed illustrates are suitable for the embodiment of SDN controller.
According to above-mentioned SDN controller, the present invention also provides a kind of control devices of SDN network, below with regard to SDN of the invention
The embodiment of network-based control device is described in detail.
It is shown in Figure 7, it is the embodiment of the control device of SDN network of the invention.SDN network in the embodiment
Control device includes junior's SDN controller, and junior's SDN controller includes receiving unit 301, the first retransmission unit 302, identification list
Member 303, judging unit 304 and transmission unit 305 receive；
Receiving unit 301 is used to receive the network in SDN network with the associated each forwarding device transmission of junior's SDN controller
Information receives service resources request；
First retransmission unit 302 is used to the network information being forwarded to center SDN controller；
For recognition unit 303 for identifying to service resources request, acquisition service resources request corresponding service identification,
And according to the corresponding resource identification of service resources request；
Judging unit 304 is for judging the corresponding service resources of resource identification whether in the network information, if it is not, then first
Service identification, resource identification are forwarded to center SDN controller by retransmission unit 302；
First retransmission unit 302 is also used to receive in the optimal data forward-path of center SDN controller transmission and junior
The forwarding strategy of the associated each forwarding device of SDN controller；Wherein, optimal data forward-path be center SDN controller according to
What service identification, resource identification and the network information obtained, each forwarding strategy is that center SDN controller is forwarded according to optimal data
Path conversion obtains；
Transmission unit 305 is used to convert corresponding flow table information for each forwarding strategy, respectively sends each flow table information
To with the associated corresponding forwarding device of junior's SDN controller.
In the present embodiment, distributed two-level management is used, is typical distributed multi-stage management mode, in SDN net
SDN controller type, function, permission are distinguished in network, are divided into center SDN controller and junior's SDN controller.Junior
SDN controller receives the network information for the forwarding device being associated, and is subsequently forwarded to center SDN controller.When junior SDN is controlled
The corresponding service resources of resource identification of service resources that device processed receives request are associated junior's SDN controller is received
Forwarding device send the network information in when, just by junior's SDN controller directly according to corresponding service identification, resource identification
And the network information obtains optimal data forward-path, and is converted into the forwarding strategy of forwarding device, is then converted to flow accordingly
Table information is sent to and the associated corresponding forwarding device of junior SDN controller.When the industry that junior's SDN controller receives
The corresponding service resources of resource identification for resource request of being engaged in are not in the received forwarding device hair being associated of junior's SDN controller
When in the network information sent, corresponding service identification and resource identification are just forwarded to center SDN controller, controlled by center SDN
Device processed obtains optimal data forward-path, and is converted into the forwarding strategy of forwarding device, is sent to corresponding each junior SDN control
Forwarding strategy is converted corresponding flow table information by device, each junior SDN controller, retransmits to each junior SDN controller and closes
The corresponding forwarding device of connection.This distributed multi-stage management mode largely alleviates the load of single SDN controller
Pressure also provides convenience for the authority distribution of the network user, district management.
It is shown in Figure 8, it is another embodiment of the control device of SDN network of the invention.SDN in the embodiment
Network-based control device includes center SDN controller, and center SDN controller includes the second retransmission unit 401 and control unit
402；
Second retransmission unit 401 is used to receive the network information, service identification and resource mark that each junior SDN controller is sent
Know；
Control unit 402 is used to obtain optimal data forward-path according to service identification, resource identification and the network information,
And convert optimal data forward-path to the forwarding strategy of each forwarding device in optimal data forward-path；
Second retransmission unit 401 be also used to by optimal data forward-path associated each turn with each junior SDN controller
The forwarding strategy of hair equipment is respectively sent to corresponding each junior SDN controller；Each forwarding in optimal data forward-path is set
Received each forwarding strategy is converted corresponding flow table information by standby associated each junior SDN controller, respectively will be with this
The associated flow table information of junior's SDN controller is sent to and the associated corresponding forwarding device of junior SDN controller.
In the present embodiment, distributed two-level management is used, is typical distributed multi-stage management mode, in SDN net
SDN controller type, function, permission are distinguished in network, are divided into center SDN controller and junior's SDN controller.In Fig. 8
Junior's SDN controller for 3, number is unlimited, also not with the associated forwarding device number of each junior SDN controller
Limit.Junior's SDN controller receives the network information for the forwarding device being associated, and is subsequently forwarded to center SDN controller.Instantly
The service resources that receive of grade SDN controller request corresponding resource identification not to be associated junior's SDN controller is received
Forwarding device send the network information in when, corresponding service identification and resource identification are just forwarded to center SDN controller,
Optimal data forward-path is obtained by center SDN controller, and is converted into the forwarding strategy of forwarding device, is sent to corresponding each
Forwarding strategy is converted corresponding flow table information by junior's SDN controller, each junior SDN controller, retransmit to each junior
The associated corresponding forwarding device of SDN controller.This distributed multi-stage management mode largely alleviates single SDN control
The load pressure of device processed also provides convenience for the authority distribution of the network user, district management.
In one of the embodiments, as shown in figure 9, center SDN controller further includes receiving unit 403 and transmission unit
404；
Receiving unit 403 is used to receive the network sent in SDN network with the associated each forwarding device of center SDN controller
Information；
Transmission unit 404 be used for by optimal data forward-path with the associated each forwarding device of center SDN controller
Forwarding strategy is converted into corresponding flow table information, will be sent to respectively with the associated flow table information of center SDN controller and center
The associated corresponding forwarding device of SDN controller.
In the present embodiment, SDN controller in center can also be associated with forwarding device, and the network information of these forwarding devices is straight
It receives and sends to center SDN controller, can so increase forwarding device, further increase the network information.
In a preferred embodiment, the control device of SDN network includes above-mentioned junior SDN controller and center control
Device.As shown in Figure 10, junior SDN the controller A and B in the control device of the SDN network of distributed two-level management are each responsible for
Network A domain and the domain B are managed, and center SDN controller is responsible for the whole network i.e. management in the domain A and the domain B.Realizing distributed pipes
It is to realize that data are transmitted by data exchange interface CSDSI between junior's SDN controller and center SDN controller when reason,
Depending on the specific protocol contents of the interface depend on actual need.For the hybrid network environment of limited resources, comprehensively consider business scope,
The factors such as network size, controller performance, SDN controller use distributed multi-stage management when real network is disposed, there is center
SDN controller and multiple junior SDN controllers composition provide efficient identification, control, district management, permission limitation etc. for business
The Internet resources of multifactor consideration distribute administrative mechanism.
Above-mentioned forwarding device is the forwarding device for supporting SDN, can wirelessly or non-wirelessly be communicated between forwarding device；
It can wirelessly or non-wirelessly be communicated between center SDN controller and junior's SDN controller.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of control device of SDN network, which is characterized in that including junior's SDN controller, the junior SDN controller packet
Include receiving unit, the first retransmission unit, recognition unit, judging unit and transmission unit；
The receiving unit is used to receive the net sent in SDN network with the associated each forwarding device of the junior SDN controller
Network information receives service resources request by northbound interface；
First retransmission unit is used to the network information being forwarded to center SDN controller；
The recognition unit is used to identify service resources request, obtains the service resources and request corresponding business
Mark, and according to the corresponding resource identification of the service resources request；
The judging unit for judge the corresponding service resources of the resource identification whether in the network information, if it is not,
Then the service identification, the resource identification are forwarded to center SDN controller by first retransmission unit；
First retransmission unit be also used to receive in the optimal data forward-path that the center SDN controller is sent with it is described
The forwarding strategy of the associated each forwarding device of junior's SDN controller；Wherein, the optimal data forward-path is the center
SDN controller is obtained according to the service identification, the resource identification and the network information, and each forwarding strategy is
The center SDN controller is obtained according to optimal data forward-path conversion；
The transmission unit is used to convert corresponding flow table information for each forwarding strategy, respectively by each flow table information
It is sent to and the associated corresponding forwarding device of the junior SDN controller.
2. the control device of SDN network according to claim 1, which is characterized in that the optimal data forward-path is
The center SDN controller according to the service identification, the resource identification and the network information, using it is controlled most
What short path algorithm obtained.
3. the control device of SDN network according to claim 1, which is characterized in that the acquisition service resources are asked
The step of seeking corresponding service identification the following steps are included:
According to the characteristic that the service resources are requested, the service identification of quintuple form, the business of the quintuple form are obtained
Mark includes source address, source port, destination address, destination port and protocol type.
4. the control device of SDN network as claimed in any of claims 1 to 3, which is characterized in that the SDN net
Network is cable network, wireless network or hybrid network.
5. the control device of SDN network according to claim 1, which is characterized in that the network information includes each described
The network information that the network information or network dynamic that forwarding device is initially sent are sent when updating.
6. the control device of SDN network according to claim 1 or 5, which is characterized in that the content packet of the network information
It includes the wirelessly or non-wirelessly transmission mode information of forwarding device information, network topological information, forwarding device port and port association, miss
Code rate and data traffic statistics.
7. a kind of control device of SDN network, which is characterized in that including center SDN controller, the center SDN controller packet
Include the second retransmission unit and control unit；
Second retransmission unit is used to receive the network information, service identification and resource identification that each junior SDN controller is sent；
Wherein, each junior SDN controller is junior's SDN controller as described in any one of claim 1 to 6；
Described control unit is used to obtain optimal data forwarding according to the service identification, the resource identification and the network information
Path, and convert the optimal data forward-path to the forwarding plan of each forwarding device in the optimal data forward-path
Slightly；
Second retransmission unit be also used to by the optimal data forward-path associated each turn with each junior SDN controller
The forwarding strategy of hair equipment is respectively sent to corresponding each junior SDN controller；Each turn in the optimal data forward-path
It sends out associated each junior SDN controller of equipment and converts corresponding flow table information for received each forwarding strategy, respectively will
And the associated flow table information of junior SDN controller is sent to and the associated corresponding forwarding device of junior SDN controller.
8. the control device of SDN network according to claim 7, which is characterized in that the center SDN controller further includes
Receiving unit and transmission unit；
The receiving unit is used to receive the net sent in SDN network with the associated each forwarding device of the center SDN controller
Network information；
The transmission unit, for by the optimal data forward-path with the associated each forwarding of the center SDN controller
The forwarding strategy of equipment is converted into corresponding flow table information, will send out respectively with the associated flow table information of the center SDN controller
Send to the associated corresponding forwarding device of the center SDN controller.
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| CN107819596B (en) * | 2016-09-12 | 2022-07-29 | 中兴通讯股份有限公司 | SDN network fault diagnosis method, device and system |
| CN106452958B (en) * | 2016-09-30 | 2020-04-07 | 中国联合网络通信集团有限公司 | Flow control method, system and centralized controller |
| CN106911769B (en) * | 2017-02-09 | 2020-10-27 | 腾讯科技（深圳）有限公司 | Cloud platform routing data processing method and physical server of cloud platform |
| CN106850830B (en) * | 2017-02-28 | 2020-11-20 | 北京神州绿盟信息安全科技股份有限公司 | Service request processing method, device and system and related server |
| CN108632161B (en) * | 2017-03-20 | 2022-04-12 | 中兴通讯股份有限公司 | Virtual network function and method for realizing service processing |
| CN108989066B (en) * | 2017-05-31 | 2022-12-20 | 中兴通讯股份有限公司 | Equipment management method and device |
| CN107579850B (en) * | 2017-09-05 | 2021-05-18 | 郑州云海信息技术有限公司 | Wired and wireless hybrid networking method based on SDN control for cloud data center |
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