CN103746911A - SDN (software defined networking) structure and communication method thereof - Google Patents
SDN (software defined networking) structure and communication method thereof Download PDFInfo
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Abstract
The embodiment of the invention provides an SDN (software defined networking) structure and a communication method thereof, relates to the field of communication, and is used for realizing parallel business processing and improving user experience in the SDN structure. The SDN structure comprises an SDN controller and first routing computation equipment. A PCC (path computation client) interface is integrated in the SDN controller; a communication link is established between the SDN controller and the first routing computation equipment through the PCC interface; the SDN controller is used for the automatic discovery of service awareness and resources; the first routing computation equipment is used for computing a service path. The SDN structure and the communication method thereof disclosed by the invention are suitable for a scene of path computation in SDN.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of SDN network configuration and communication means thereof.
Background technology
Along with the development of the communication technology, SDN(Software Defined Networking, software defined network) development more and more come into one's own.In SDN network, by controlling and forwarding the measures such as the optimization of Fen Li, cross-layer and scheduling, statistics based on stream and charging, the policy control based on stream, open north-south interface, can bring low cost to transport network, simplify the benefits such as operation maintenance.Wherein, SDN controller is the critical component in SDN network configuration.
In existing SDN network configuration, route computing unit is as a functional module in SDN controller, for carrying out service path calculating.Like this, route computing unit, when carrying out service path calculating, need to take more SDN controller internal memory and processor resource.When route computing unit carries out service path calculating and takies processor resource, other modules cannot be used processor resource to carry out the processing of business, need to wait for the calculating of handling service path to route computing unit, cause like this cannot realizing concurrent service processing in SDN network configuration, reduced user's experience.
Summary of the invention
The embodiment of the present invention provides a kind of SDN network configuration and communication means thereof, in order to realize concurrent service processing in SDN network configuration, improves user and experiences.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, the embodiment of the present invention provides a kind of path calculating client SDN network configuration, comprising: SDN controller and the first via are by computing equipment; Wherein, in described SDN controller, be integrated with path calculating client PCC interface; Described SDN controller is set up communication link by described PCC interface and the described first via by computing equipment; Described SDN controller, for the automatic discovery of service-aware and resource; The described first via is by computing equipment, for computing service path.
Second aspect, the embodiment of the present invention provides a kind of communication means of software defined network SDN network configuration, and described SDN network configuration SDN controller and the first via are by computing equipment; Wherein, in described SDN controller, be integrated with path calculating client PCC interface; Described SDN controller is connected by computing equipment with the described first via by described PCC interface; Described method comprises: described SDN controller receives the Openflow packet that forwarding unit sends; Described SDN controller is resolved described Openflow packet, obtains valid data; Described valid data comprise: source address information and destination address information; Described SDN controller, according to described source address information and destination address information, obtains port and the transmission path information corresponding with described source address information and destination address information; Described SDN controller, according to described port and transmission path information, obtains route calculation request message; In described route calculation request message, carry source address and destination address information, transmission path information and the tactful relevant information in calculative path; Described SDN controller sends route calculation request message to the described first via by computing equipment by PCC, to make the described first via carry out corresponding path computing by computing equipment according to described route calculation request message; Described SDN controller receives by described PCC the route calculating reply message that the described first via is sent by computing equipment, and wherein, described route is calculated reply message and is: route is calculated success message or route calculating failed message; Described route is calculated and is replied the relevant information that carries path in message; Described SDN controls according to described route and calculates and reply message, generates response message; Described SDN controller returns to described response message to described forwarding unit.
The third aspect, the embodiment of the present invention provides a kind of communication means of software defined network SDN network configuration, and described SDN network configuration SDN controller and the first via are by computing equipment; Wherein, in described SDN controller, be integrated with path calculating client PCC interface; Described SDN controller is set up communication link by described PCC interface and the described first via by computing equipment; Described method comprises: the described first via receives by computing equipment the route calculation request message that described SDN controller sends; In described route calculation request message, carry source address and destination address information, transmission path information and the tactful relevant information in calculative path; The described first via is carried out path computing by computing equipment according to described route calculation request message; The described first via sends route by computing equipment to described SDN controller and calculates reply message; Wherein, described route calculating reply message is that route is calculated success message or route is calculated failed message; And described route is calculated and is replied the relevant information that carries path computing in message.
The embodiment of the present invention provides a kind of SDN network configuration and communication means thereof, in SDN network configuration, comprises that SDN controller and the first via are by computing equipment, wherein, in described SDN controller, is integrated with PCC interface; Described SDN controller is connected by computing equipment with the described first via by described PCC interface.Like this, at SDN controller, be connected by computing equipment with the external first via, thereby can by computing equipment, to service path, be calculated by the external first via, and without route computing equipment is set in SDN controller inside, make when the first via is carried out service path calculating by computing equipment, SDN controller can be processed other business simultaneously, and without waiting for that the first via is completed by computing equipment, like this, the first via is by having realized parallel Business Processing between computing equipment and SDN controller, thereby in SDN network configuration, realize concurrent service processing, improved user's experience.And because the first via is not built in SND controller by computing equipment, no longer take the resource of memory source and the processor of SDN controller, and then reduced the processing load of SDN controller.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of a kind of SDN network configuration that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the another kind of SDN network configuration that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the another kind of SDN network configuration that Fig. 3 provides for the embodiment of the present invention;
The schematic diagram of the communication means of a kind of SDN network configuration that Fig. 4 provides for the embodiment of the present invention;
The schematic diagram of the communication means of the another kind of SDN network configuration that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite,
All belong to the scope of protection of the invention.
The embodiment of the present invention a kind of SDN network configuration, as shown in Figure 1, comprising: SDN(Software Defined Networking, software defined network) controller 101 and the first via be by computing equipment 102.Wherein, in described SDN controller 101, be integrated with PCC(path computation client, path calculating client) interface 103; Described SDN controller 101 is connected by computing equipment 102 with the described first via by described PCC interface 103.
Concrete, in SDN network configuration, be provided with SDN controller, and in SDN controller 101 integrated PCC interface 103, PCC interface 103 can and the first via by setting up communication link between computing equipment 102, thereby SDN controller 101 can carry out the transmission of data by computing equipment 102 by PCC interface 103 and the first via outside SDN controller 101.
Now, SDN controller 101 is in the time need to carrying out the calculating of service path, can by computing equipment 102, be sent to the external first via route calculation request message of the source address information, destination address information and the tactful relevant information that carry the path that need to carry out, to make the first via can carry out the calculating in path according to this path computing request message by computing equipment 102, thereby the result of calculating can be replied to message by path computing, be sent to SDN controller 101.
Described SDN controller 101, for the automatic discovery of service-aware and resource.
Concrete, SDN controller 101 can receive the packet that forwarding unit sends, and this packet is resolved, thereby the source address of getting and destination address information, and get the port corresponding with source address and destination address information and transmission path information according to source address and destination address information, generate route and calculate message, being SDN controller can be for service-aware.
Further, SDN controller 101 can carry out with forwarding unit the automatic discovery that completes alternately resource of information, and its detailed process is identical with prior art, does not repeat them here.
The described first via is by computing equipment 102, for computing service path.
Concrete, the first via by computing equipment 102 when receiving SDN controller 101 and need computing service path, can carry out the calculating of service path according to the source address in path and destination address information, transmission path information and tactful relevant information, thereby available route calculating reply message is sent to SDN, control 101.
It should be noted that, in embodiments of the present invention, SDN controller 101 is without the calculating of carrying out service path, can be only for the automatic discovery of service-aware and resource.
Further, SDN controller is set up communication link by described PCC interface and the described first via by computing equipment: described SDN controller 101 by PCC interface 103 with the described first via by computing equipment 102 by PCEP(path computation element communication protocol, path-calculating element communication protocol) agreement sets up communication link.
It should be noted that, PCEP agreement is to be based upon TCP(Transmission Control Protocol, transmission control protocol) reliable communication and flow control basis on, realize the transmission of messages between PCC interface and route computing unit.
Like this, at SDN controller, be connected by computing equipment with the external first via, thereby can by computing equipment, to service path, be calculated by the external first via, and without route computing equipment is set in SDN controller inside, make when the first via is carried out service path calculating by computing equipment, SDN controller can be processed other business simultaneously, and without waiting for that the first via is completed by computing equipment.The first via is by having realized parallel Business Processing between computing equipment and SDN controller, thereby realizes concurrent service processing in SDN network configuration, improved user's experience.And because the first via is not built in SND controller by computing equipment, no longer take the resource of memory source and the processor of SDN controller, and then reduced the processing load of SDN controller.
Further, as shown in Figure 2, described SDN network configuration also comprises: at least one secondary route computing equipment 104.
Wherein, described secondary route computing equipment 104 is connected by computing equipment 102 with the described first via.
It should be noted that, when the first via is not enough by the computational resource of computing equipment 102, can increase at least one secondary route computing equipment 104, and at least one secondary route computing equipment 104 is connected by computing equipment 103 with the first via, make at least one secondary route computing equipment 104 and the first routing device 102 jointly carry out the calculating of service path, thus the resource in the computing service path of expansion SDN network configuration.
Concrete, when SDN controller 101 need to carry out the calculating of a large amount of service paths, the first via is limited by the disposal ability of computing equipment 102, now, adds the calculating at least one secondary route equipment 104 and the first routing device 102 common finishing service paths.Now, at least one secondary route computing equipment 104 is connected to the first via by computing equipment 102, so as the first via by computing equipment 102 by the dispensed of service path at least one secondary route computing equipment 104.
The described first via is by computing equipment 102, also for managing described at least one secondary route computing equipment 104.
Concrete, when SDN network configuration is carried out the expansion of route computing equipment, at least one secondary route computing equipment 104 of expansion need to be connected to the first via by computing equipment 102, by the first routing device 102, managed, now, the first via need to, connecting during at least one secondary route computing equipment 104, be obtained the resource capability information of this at least one secondary route computing equipment 104 by route computing equipment 102, thus better distribution service path computing task.
Described at least one secondary route computing equipment 104, for computing service path.
Concrete, at least one secondary route computing equipment 104 be connected to the first via by computing equipment 102 after, the service path calculation task that can be distributed by computing equipment 102 according to the first via, computing service path.
It should be noted that, the connected mode between at least one secondary route computing equipment can be connected in series, can be that annular connects, the also connection of other modes, and the present invention does not limit this.
Like this, in SDN network configuration, when SDN controller need to carry out a large amount of service path calculating, in order to carry out faster the calculating of service path, the first via is connected at least one secondary route computing equipment by computing equipment, be the first via is expanded by computing equipment, thereby can quicker more effectively carry out service path calculating, improved the efficiency of SDN network configuration, and when the inadequate resource of computing service path, can be by increasing the mode of at least one the secondary route computing equipment being connected by computing equipment with the first via, the resource in the computing service path in expansion SDN network configuration, improved the extensibility of SDN network.
Further, the first via is by computing equipment 102, the Internet resources that also send for the treatment of described SDN controller 101.
Concrete, at SDN controller 101, found Internet resources, these Internet resources can be sent to the first via and be processed by computing equipment 102, without oneself, process, reduced the processing load of SDN controller.
Further, as shown in Figure 3, SDN controller 101 comprises: multi-protocols adaptation module 1011, global network resource management module 1012, OpenFlow stream table administration module 1013, global policies administration module 1014, network virtualization module 1015 and northbound interface 1016.
Concrete, multi-protocols adaptation module 1011, for issuing stream table configuration information to forwarding unit; And processing forward the equipment request message, link discovery messages, port status message, change in topology message or other message that send, and the request message of processing, link discovery messages, port status message, change in topology message or other message are submitted to upper layer module control processing.
Global network resource management module 1012, for according to the net element information of collecting, obtains the information such as nodes and internodal link; Can calculate and maintaining network topology information, and energy Gains resources occupied information and statistical information; Global network resource is carried out abstractly simultaneously, and provide abstract model for use in global path computation.
OpenFlow stream table administration module 1013, be used for according to the result of calculation of route computing unit 102, generate the flow configuration item of different business, according to Different Strategies setting and management flow table information, to calculating based on route the path generating, carry out the renewal of stream table, and the forwarding flow table of generation is issued to data transfer equipment by lower module.
Global policies administration module 1014, the strategy calculating for configure overall route based on service application demand, network management requirement, also can be according to the network resource information gathering, the renewal of trigger policy and adjustment.
Wherein, strategy comprises the information such as routing forwarding priority, the whole network flow equalization, stream table occurrence, protection.
The embodiment of the present invention provides a kind of SDN network configuration, in SDN network configuration, comprises that SDN controller and the first via are by computing equipment, wherein, in described SDN controller, is integrated with PCC interface; Described SDN controller is connected by computing equipment with the described first via by described PCC interface.Like this, at SDN controller, be connected by computing equipment with the external first via, thereby can by computing equipment, to service path, be calculated by the external first via, and without route computing equipment is set in SDN controller inside, when the first via is carried out service path calculating by computing equipment, SDN controller can be processed other business simultaneously, and without waiting for that the first via is completed by computing equipment, like this, the first via is by having realized parallel Business Processing between computing equipment and SDN controller, thereby in SDN network configuration, realize concurrent service processing, improved user's experience.And because the first via is not built in SND controller by computing equipment, no longer take the resource of memory source and the processor of SDN controller, and then reduced the processing load of SDN controller, increased the service efficiency of SDN controller.And, when the first via is not enough by the computational resource of computing equipment, can, by increasing at least one secondary route computing equipment, by computing equipment, jointly carry out the calculating of service path with the first via, thereby improve efficiency and the autgmentability of SDN network configuration.
The embodiment of the present invention provides a kind of communication means of software defined network SDN network configuration, and described SDN network configuration SDN controller and the first via are by computing equipment; Wherein, in described SDN controller, be integrated with path calculating client PCC interface; Described SDN controller is connected by computing equipment with the described first via by described PCC interface.As shown in Figure 4, described method comprises:
301, SDN controller receives the Openflow packet that forwarding unit sends.
It should be noted that, in embodiments of the present invention, SDN controller can comprise different modules, by different modules, to carrying out data, carries out different disposal.Further, SDN controller comprises: multi-protocols adaptation module, global network resource management module, OpenFlow stream table administration module, global policies administration module, network virtualization module and northbound interface.
Concrete, when forwarding unit receives after packet, resolve the destination address information of this packet, thereby can search forwarding flow table according to this destination address information, if do not find one that destination address information therewith matches in forwarding flow table, forwarding unit encapsulates the header packet information of this packet according to the form of Openflow agreement, thereby obtains Openflow packet.Forwarding unit by this Openflow Packet Generation to SDN controller.SDN controller can receive the Openflow packet that forwarding unit sends by multi-protocols adaptation module.
302, described SDN controller is resolved described Openflow packet, obtains valid data.
Concrete, SDN controller receives after Openflow packet by multi-protocols adaptation module, multi-protocols matching module can be resolved Openflow packet, thereby can from Openflow packet, parse valid data, is the header packet information of the packet of forwarding unit.Wherein, described valid data comprise: source address information and destination address information.
303, described SDN controller, according to described source address information and destination address information, obtains port and the transmission path information corresponding with described source address information and destination address information.
Concrete, the multi-protocols adaptation module of SDN controller is being obtained after valid data, and these valid data are sent to the global network management resource module that SDN controls.Now, the global network resource management module of SDN controller is receiving after valid data, can be according to the source address information in valid data and destination address information, the first storage list that inquiry has been stored, thereby in can the first storage list, find with source address information and destination address information to corresponding list item, thereby can get with source address information and destination address information to corresponding port and transmission path information.
It should be noted that, in the list item of storing in the first storage list, record source address and destination address information, and corresponding port and transmission path information.
Further, transmission path information can comprise: bandwidth information during path transmission, qos requirement information, Delay.
It should be noted that the also information of other and path transmission relevant information of transmission path information.
304, described SDN controller, according to described source address information and destination address information and corresponding port and transmission path information thereof, obtains route calculation request message.
Wherein, in described route calculation request message, carry source address and destination address information, transmission path information and the tactful relevant information in calculative path.
Concrete, the global network resource management module of SDN controller is obtaining source address information and destination address information after corresponding port and transmission path information, source address information and destination address information and corresponding port thereof and transmission path information can be sent to the global policies administration module of SDN controller.The global policies administration module of SDN controller is receiving after the port and transmission path information of source address information and destination address information and correspondence thereof, can, according to source address information and destination address information and corresponding port and transmission path information acquisition strategy relevant information thereof, thereby generate, carry the source address in calculative path and the route calculation request message of destination address information, transmission path information and tactful relevant information.
Strategy relevant information comprises: the jumping figure information in path, reliability information.
It should be noted that, tactful relevant information also can comprise other information, the such as precedence information between path etc., and the present invention does not limit this.
305, described SDN controller sends route calculation request message to the described first via by computing equipment by PCC interface, when making the described first via carry out corresponding path computing by computing equipment according to described route calculation request message, described SDN controller is processed new data packet traffic.
Concrete, the global network resource management module of SDN controller, generating after route calculation request message, is sent to PCC interface by this route calculation request message, by PCC interface, route calculation request message is sent to the described first via by computing equipment.Now, the processor of SDN controller is in Idle state, and SDN controller can carry out the processing procedure of other data packet traffic.Like this, SDN controller and the first via can be carried out the processing of data by computing equipment simultaneously, realize the parallel data processing of SDN network configuration.
306, described SDN controller receives by described PCC interface the route calculating reply message that the described first via is sent by computing equipment.
Wherein, described route calculating reply message is: route calculates success message or route is calculated failed message.Described route is calculated and is replied the relevant information that carries path in message.
Concrete, SDN controller receives the way of escape by calculating reply message by PCC interface, and PCC interface is resolved this route and is calculated reply message, determines that it is that route is calculated success message or route is calculated failed message that message is replied in this route calculating.
Further, when described route calculating reply message is path computing success, the relevant information that carries path computing in described route calculating reply message comprises: the attribute of routing information and described routing information.
It should be noted that, the attribute of routing information is the relevant information that is used to indicate the every paths calculating, and for example, the attribute of routing information comprises: the path cost of every paths, required bandwidth.
It should be noted that, the attribute of routing information also can comprise other information, and the present invention does not limit this.
When described route calculating reply message is path computing failure, the relevant information that carries path computing in described route calculating reply message comprises: the reason relevant information of path computing failure.
Further, in the relevant information of path computing, can also comprise: the advisory information of path computing failure.
Further, if PCC interface is determined route, calculate that to reply message be that route is calculated during success message, the route of relevant information that carries path is calculated to success message and be sent to Openflow stream table administration module.
If PCC interface is determined route and calculated that to reply message be that route is calculated during failed message, the route of relevant information that carries path is calculated to failed message and be sent to global policies administration module.
307, described SDN controller calculates and replys message according to described route, generates response message.
Concrete, when route calculating reply message is route calculating success message, when the Openflow stream table administration module of SDN controller receives the route calculating success message of the relevant information that carries path, the routing information that can be sent by computing equipment according to the first via and the attribute of described routing information, generate stream table information, and this stream table information is sent to multi-protocols adaptation module.
When route calculating reply message is route calculating failed message, the global policies administration module of SDN controller calculates after failed message in the route that receives the relevant information that carries path, the reason relevant information of the path computing failure that can be sent by computing equipment according to the first via, failed regeneration response message, and this failure response message is sent to Openflow stream table administration module, Openflow stream table administration module is forwarded to multi-protocols adaptation module by failure response message thus.
308, described SDN controller returns to described response message to described forwarding unit.
Concrete, when route calculating reply message is route calculating success message, response message is stream table information, the multi-protocols adaptation module of SDN controller receives the stream table information that Openflow stream table administration module sends, the form that this multi-protocols adaptation module is carried out Openflow agreement by this stream table information encapsulates, and the stream table information after encapsulation is sent to forwarding unit.
When route calculating reply message is route calculating failed message, response message is failure response message, the multi-protocols adaptation module of SDN controller receives the failure response message that Openflow stream table administration module sends, the form that this multi-protocols adaptation module is carried out Openflow agreement by this failure response message encapsulates, and the failure response message after encapsulation is sent to forwarding unit.
It should be noted that, in all embodiment of the present invention, when SDN controller is communicated by computing equipment by PCC interface and the first via, PCC interface and the first via be need to first set up by the communication link between computing equipment, can PCC interface and the first via be set up by the communication link between computing equipment by Open message and Keepalive message.
The embodiment of the present invention provides a kind of communication means of SDN network configuration, in SDN network configuration, SDN controller is receiving after the Openflow packet of forwarding unit transmission, parse corresponding information, thereby when carrying out path computing, needs generate route calculation request message, and can to the external first via, by computing equipment, send route calculation request message by PCC interface, make the first via by computing equipment, be carried out the processing of path computing, and receive the path computing reply message that route computing unit returns.Like this, when SDN controller need to carry out path computing, by the external first via, by computing equipment, undertaken.When the first via is carried out service path calculating by computing equipment, SDN controller can be processed other business simultaneously, and without waiting for that the first via is completed by computing equipment.The first via is by having realized parallel Business Processing between computing equipment and SDN controller, thereby realizes concurrent service processing in SDN network configuration, improved user's experience.And because the first via is external in SDN controller by computing equipment, so the first via no longer takies the resource of memory source and the processor of SDN controller while carrying out path computing by computing equipment, and then reduced the processing load of SDN controller, increased the service efficiency of SDN controller.
The embodiment of the present invention provides a kind of communication means of software defined network SDN network configuration, and described SDN network configuration SDN controller and the first via are by computing equipment; Wherein, in described SDN controller, be integrated with path calculating client PCC interface; Described SDN controller is set up communication link by described PCC interface and the described first via by computing equipment.As shown in Figure 5, described method comprises:
401, the described first via receives by computing equipment the route calculation request message that described SDN controller sends.
Wherein, in described route calculation request message, carry source address and destination address information, transmission path information and the tactful relevant information in calculative path.
Further, transmission path information can comprise: bandwidth information during path transmission, qos requirement information, Delay.
It should be noted that the also information of other and path transmission relevant information of transmission path information.
Strategy relevant information comprises: the jumping figure information in path, reliability information.
It should be noted that, tactful relevant information also can comprise other information, the such as precedence information between path etc., and the present invention does not limit this.
402, the described first via is carried out path computing by computing equipment according to described route calculation request message, and generates route calculating reply message.
Concrete, the first via is receiving route calculation request message by computing equipment, according to the source address in the path of carrying in computation request message and destination address information, transmission path information and tactful relevant information, carries out the calculating in path.And, can generate to calculate according to result of calculation and reply message.
Further, when the first via is not enough by the computational resource of computing equipment, the described first via, is triggered at least one secondary route computing equipment and carries out service path calculating according to described route calculation request message by computing equipment, and generate route calculating reply message according to result of calculation
Concrete, in the first via by the computational resource of computing equipment during without the required resource of the calculating that meets service path, the first via can be according to the computational resource of at least one secondary route computing equipment by computing equipment, to the task of at least one secondary route computing equipment distribution service path computing of its management, trigger at least one secondary route computing equipment and carry out service path calculating, thereby make at least one secondary route computing equipment and the described first via by computing equipment, jointly be carried out the calculating of service path.
At least one secondary route computing equipment has carried out after path computing, the route result of calculation of calculating is back to the first via by computing equipment, thereby makes the route result of calculation that the first via is returned according at least one secondary route computing equipment by computing equipment generate calculating reply message.
Wherein, described route calculating reply message is that route is calculated success message or route is calculated failed message; And described route is calculated and is replied the relevant information that carries path computing in message.
Further, when described route calculating reply message is path computing success, the relevant information that carries path computing in described route calculating reply message comprises: the attribute of routing information and described routing information.
It should be noted that, the attribute of routing information is the relevant information that is used to indicate the every paths calculating, and for example, the attribute of routing information comprises: the path cost of every paths, required bandwidth.
It should be noted that, the attribute of routing information also can comprise other information, and the present invention does not limit this.
When described route calculating reply message is path computing failure, the relevant information that carries path computing in described route calculating reply message comprises: the reason relevant information of path computing failure.
403, the described first via sends route by computing equipment to described SDN controller and calculates reply message.
The embodiment of the present invention provides a kind of communication means of SDN network configuration, in SDN network configuration, the first via by computing equipment receive SDN controller send route calculation request message, according to the route calculation request message receiving, carry out the processing of path computing, and reply message to SDN controller path computation.Like this, when SDN controller need to carry out path computing, by the external first via, by computing equipment, undertaken.When the first via is carried out service path calculating by computing equipment, SDN controller can be processed other business simultaneously, and without waiting for that the first via is completed by computing equipment.The first via is by having realized parallel Business Processing between computing equipment and SDN controller, thereby realizes concurrent service processing in SDN network configuration, improved user's experience.And because the first via is external in SDN controller by computing equipment, so no longer take the resource of memory source and the processor of SDN controller when the first via is carried out path computing by computing equipment, and then reduced the processing load of SDN controller, increased the service efficiency of SDN controller.
In the several embodiment that provide in the application, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual realization, can have other dividing mode, for example multiple unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in multiple network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, the each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit comprises, also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that also can adopt hardware to add SFU software functional unit realizes.
The integrated unit that the above-mentioned form with SFU software functional unit realizes, can be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, comprises that some instructions are in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) carry out the part steps of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read-only memory (Read-Only Memory, be called for short ROM), the various media that can be program code stored such as random access memory (Random Access Memory, be called for short RAM), magnetic disc or CD.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (12)
1. a software defined network SDN network configuration, is characterized in that, comprising: SDN controller and the first via are by computing equipment; Wherein,
In described SDN controller, be integrated with path calculating client PCC interface; Described SDN controller is set up communication link by described PCC interface and the described first via by computing equipment;
Described SDN controller, for the automatic discovery of service-aware and resource;
The described first via is by computing equipment, for computing service path.
2. SDN network configuration according to claim 1, is characterized in that, also comprises: at least one secondary route computing equipment; Wherein,
Described secondary route computing equipment is connected by computing equipment with the described first via;
The described first via is by computing equipment, also for managing described at least one secondary route computing equipment;
Described at least one secondary route computing equipment, for computing service path.
3. SDN network configuration according to claim 1 and 2, is characterized in that,
The described first via is by computing equipment, the Internet resources that also send for the treatment of described SDN controller.
4. according to the SDN network configuration described in claim 1-3 any one, it is characterized in that, described SDN controller comprises: multi-protocols adaptation module, global network resource management module, OpenFlow stream table administration module, global policies administration module, network virtualization module and northbound interface.
5. according to the SDN network configuration described in claim 1-4 any one, it is characterized in that, described SDN controller is set up communication link by described PCC interface and the described first via by computing equipment and is comprised:
Described SDN controller is set up communication link by computing equipment by path-calculating element communication protocol PCEP agreement by PCC interface and the described first via.
6. a communication means for software defined network SDN network configuration, is characterized in that, described SDN network configuration SDN controller and the first via are by computing equipment; Wherein, in described SDN controller, be integrated with path calculating client PCC interface; Described SDN controller is connected by computing equipment with the described first via by described PCC interface; Described method comprises:
Described SDN controller receives the Openflow packet that forwarding unit sends;
Described SDN controller is resolved described Openflow packet, obtains valid data; Described valid data comprise: source address information and destination address information;
Described SDN controller, according to described source address information and destination address information, obtains port and the transmission path information corresponding with described source address information and destination address information;
Described SDN controller, according to described source address information and destination address information and corresponding port and transmission path information thereof, obtains route calculation request message; In described route calculation request message, carry source address and destination address information, transmission path information and the tactful relevant information in calculative path;
Described SDN controller sends route calculation request message to the described first via by computing equipment by PCC interface, so that when the described first via is carried out corresponding path computing by computing equipment according to described route calculation request message, described SDN controller is processed new data packet traffic;
Described SDN controller receives by described PCC interface the route calculating reply message that the described first via is sent by computing equipment, and wherein, described route is calculated reply message and is: route is calculated success message or route calculating failed message; Described route is calculated and is replied the relevant information that carries path in message;
Described SDN controller calculates and replys message according to described route, generates response message;
Described SDN controller returns to described response message to described forwarding unit.
7. method according to claim 6, is characterized in that, when described route calculating reply message is path computing success, the relevant information that carries path computing in described route calculating reply message comprises: the attribute of routing information and described routing information;
Described SDN controller calculates and replys message according to described route, generates response message and comprises:
Described SDN controller calculates success message according to described route, generates stream table information;
Described SDN controller returns to described response message to described forwarding unit and comprises:
Described SDN controller returns to described stream table information to described forwarding unit.
8. method according to claim 6, is characterized in that, when described route calculating reply message is path computing failure, the relevant information that carries path computing in described route calculating reply message comprises: the reason relevant information of path computing failure;
Described SDN controller calculates and replys message according to described route, generates response message and comprises:
Described SDN controller calculates failed message, failed regeneration response message according to described route;
Described SDN controller returns to described response message to described forwarding unit and comprises:
Described SDN controller returns to described failure response message to described forwarding unit.
9. a communication means for software defined network SDN network configuration, is characterized in that, described SDN network configuration SDN controller and the first via are by computing equipment; Wherein, in described SDN controller, be integrated with path calculating client PCC interface; Described SDN controller is set up communication link by described PCC interface and the described first via by computing equipment; Described method comprises:
The described first via receives by computing equipment the route calculation request message that described SDN controller sends; In described route calculation request message, carry source address and destination address information, transmission path information and the tactful relevant information in calculative path;
The described first via is carried out path computing by computing equipment according to described route calculation request message, and generates route calculating reply message; Wherein, described route calculating reply message is that route is calculated success message or route is calculated failed message; And described route is calculated and is replied the relevant information that carries path computing in message;
The described first via sends route by computing equipment to described SDN controller and calculates reply message.
10. method according to claim 9, is characterized in that, when described route calculating reply message is path computing success, the relevant information that carries path computing in described route calculating reply message comprises: the attribute of routing information and described routing information.
11. methods according to claim 9, is characterized in that, when described route calculating reply message is path computing failure, the relevant information that carries path computing in described route calculating reply message comprises: the reason relevant information of path computing failure.
12. according to the method described in claim 9-11 any one, it is characterized in that, the described first via is carried out path computing by computing equipment according to described route calculation request message, and generate route calculate reply message comprise:
When the first via is not enough by the computational resource of computing equipment, the described first via, is triggered at least one secondary route computing equipment and carries out service path calculating according to described route calculation request message by computing equipment, and according to result of calculation, generates route and calculate and reply message.
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