CN106571993A - Data transmission method, data transmission device and data transmission system - Google Patents
Data transmission method, data transmission device and data transmission system Download PDFInfo
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- CN106571993A CN106571993A CN201610989372.0A CN201610989372A CN106571993A CN 106571993 A CN106571993 A CN 106571993A CN 201610989372 A CN201610989372 A CN 201610989372A CN 106571993 A CN106571993 A CN 106571993A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- Computer Networks & Wireless Communication (AREA)
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- Computer Security & Cryptography (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a data transmission method, a data transmission device and a data transmission system. The data transmission method applied to a network forwarding node comprises the following steps: when the quintuple information carried by a received data message is already stored locally and there is a corresponding special strategy routing, the data message is forwarded according to the special strategy routing; and when the quintuple information carried by the received data message is not stored locally, a special strategy routing is built for the quintuple information, and the data message is forwarded according to the special strategy routing. According to the invention, a protocol type corresponding to a message can be identified, and corresponding traffic redirection can be implemented according to the protocol type.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of methods, devices and systems of transmission data.
Background technology
With the raising that IT application in enterprises is required, requirement more and more higher of the large enterprise to network insertion, this is not only showed
It is the demand more and more higher to service bandwidth, it is also desirable to which network can carry out automatic flow tune according to user's reality in net demand
It is whole.
But at present the configuration of enterprise inner network is generally all to realize static configuration by manually by methods such as order lines
, adjustment in time can not be made according to the currently practical demand of user.For the application of enterprise customer, be generally all on
The agreement application of layer, therefore, it is also lift that Consumer's Experience proposed new how to adjust bandwidth in time for agreement application
Demand.
The content of the invention
The technical problem to be solved is to provide a kind of methods, devices and systems of transmission data, is capable of identify that
The corresponding protocol type of message simultaneously carries out corresponding flow redirection according to protocol type.
A kind of method of transmission data is embodiments provided, forwarded node is applied to, including：
When five-tuple information entrained in the data message for receiving is locally stored, and have corresponding special
During policybased routing, forwarded according to the special policybased routing；
When five-tuple information entrained in the data message for receiving is not when locally stored, for five-tuple letter
Breath sets up special policybased routing, is forwarded according to the special policybased routing.
The embodiment of the present invention additionally provides a kind of method of transmission data, is applied to controller, including：
Receive and received after the message of message protocol type for identification, it is true by carrying out deep-packet detection to the message
The protocol type of the fixed message；
When protocol massages of the message for predefined type, it is determined that and issuing and the five-tuple letter carried in the message
Corresponding special policybased routing is ceased, for carrying the forwarding of the message in forwarded node of the five-tuple information.
The embodiment of the present invention additionally provides a kind of device of transmission data, is applied to forwarded node, including：
First data forwarding module, for when five-tuple information entrained in the data message for receiving is local
Storage, and when having corresponding special policybased routing, forwarded according to the special policybased routing；
Second data forwarding module, for locally not depositing when five-tuple information entrained in the data message for receiving
Chu Shi, for the five-tuple information special policybased routing is set up, and is forwarded according to the special policybased routing.
The embodiment of the present invention additionally provides a kind of device of transmission data, is applied to controller, including：
Packet parsing module, receives after the message of message protocol type, by the report for receiving for identification
Text carries out the protocol type that deep-packet detection determines the message；
Routing configuration module, for when the message for predefined type protocol massages when, it is determined that and issuing and the report
The corresponding special policybased routing of five-tuple information carried in text, the message for carrying the five-tuple information turns in network
Send out the forwarding of node.
The embodiment of the present invention additionally provides a kind of system of transmission data, including above-mentioned forwarded node and controller.
Compared with prior art, a kind of methods, devices and systems of transmission data provided in an embodiment of the present invention, network turns
Send out node and the data message for carrying five-tuple information is sent on controller, controller to the message by carrying out deep-packet detection
Determine the protocol type of the message, when protocol massages of the message for predefined type, controller determines and to the net
Network forward node is issued and the corresponding special policybased routing of five-tuple information carried in the message, forwarded node according to
The special policybased routing is forwarded to the message of predetermined protocol type.The technical scheme of the embodiment of the present invention is capable of identify that report
The corresponding protocol type of text simultaneously carries out corresponding flow redirection according to protocol type.
Description of the drawings
Fig. 1 is a kind of method flow diagram of transmission data of the embodiment of the present invention (forwarded node).
Fig. 2 is a kind of method flow diagram of transmission data (controller) of the embodiment of the present invention.
Fig. 3 is a kind of schematic device of transmission data of the embodiment of the present invention (forwarded node).
Fig. 4 is a kind of schematic device of transmission data (controller) of the embodiment of the present invention.
Fig. 5 is a kind of SDN system schematic of the embodiment of the present invention.
Fig. 6 is the internal structure schematic diagram of gateway in the embodiment of the present invention.
Fig. 7 is a kind of method flow diagram of transmission data in example of the present invention 1.
Specific embodiment
To make the object, technical solutions and advantages of the present invention become more apparent, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutual combination in any.
As shown in figure 1, embodiments providing a kind of method of transmission data, forwarded node is applied to, is wrapped
Include：
S110, when five-tuple information entrained in the data message for receiving is locally stored, and has correspondence
Special policybased routing when, forwarded according to the special policybased routing；
S120, when five-tuple information entrained in the data message for receiving is not when locally stored, for described five
Tuple information sets up special policybased routing, is forwarded according to the special policybased routing.
Alternatively, it is described to set up special policybased routing for the five-tuple information and include：
Report the message for receiving message protocol type for identification；
After the tunnel building information that dedicated tunnel is set up with dedicated router is received, according to the tunnel building information
Set up and the dedicated tunnel between the dedicated router, it is determined that through the special policybased routing of the dedicated tunnel；
Wherein, the dedicated tunnel with corresponding to specific five-tuple information.
Alternatively, it is described to determine that the special policybased routing through the dedicated tunnel includes：
Report tunnel building completion message；
After receiving the routing iinformation for specific protocol type, record corresponding with the specific protocol type through institute
State the special policybased routing of dedicated tunnel.
Alternatively, the dedicated router is Level 2 Tunnel Protocol L2TP server；
The tunnel building information includes：
L2TP client configuration informations：The user name of client, password and virtual interface IP address；
L2TP server end configuration informations：The user name of server end, password and virtual interface IP address.
Alternatively, the special policybased routing through the dedicated tunnel includes：Specific five-tuple information and special road
By the virtual interface IP address of device.
As shown in Fig. 2 embodiments providing a kind of method of transmission data, controller is applied to, including：
S210, receives and is received after the message of message protocol type, by carrying out deep packet to the message for identification
Detection determines the protocol type of the message；
S220, when protocol massages of the message for predefined type, it is determined that and issuing and five carried in the message
The corresponding special policybased routing of tuple information, for carrying message the turning in forwarded node of the five-tuple information
Send out.
It is alternatively, described to determine and issue special policybased routing corresponding with the five-tuple information carried in the message,
Including：
It is determined that from the forwarded node to the tunnel building information of the dedicated tunnel dedicated router, and issue
To the forwarded node.
It is alternatively, described to determine and issue special policybased routing corresponding with the five-tuple information carried in the message,
Also include：
After the tunnel building completion message that the forwarded node is reported is received, the association of the predefined type is determined
The corresponding special policybased routing through the dedicated tunnel of view, and it is handed down to the forwarded node.
Alternatively, the dedicated router is Level 2 Tunnel Protocol L2TP server；
The tunnel building information includes：
L2TP client configuration informations：The user name of client, password and virtual interface IP address；
L2TP server end configuration informations：The user name of server end, password and virtual interface IP address.
Alternatively, the special policybased routing through the dedicated tunnel includes：Specific five-tuple information and special road
By the virtual interface IP address of device.
As shown in figure 3, embodiments providing a kind of device of transmission data, forwarded node is applied to, is wrapped
Include：
First data forwarding module 301, for existing when five-tuple information entrained in the data message for receiving
It is locally stored, and when having corresponding special policybased routing, forwarded according to the special policybased routing；
Second data forwarding module 302, for when five-tuple information entrained in the data message for receiving is not at this
During ground storage, special policybased routing is set up for the five-tuple information, forwarded according to the special policybased routing.
Alternatively, the second data forwarding module 302, for setting up special policybased routing bag for the five-tuple information
Include：
Report the message for receiving message protocol type for identification；
After the tunnel building information that dedicated tunnel is set up with dedicated router is received, according to the tunnel building information
Set up and the dedicated tunnel between the dedicated router, it is determined that through the special policybased routing of the dedicated tunnel；
Wherein, the dedicated tunnel with corresponding to specific five-tuple information.
Alternatively, the second data forwarding module 302, for determining the special policybased routing bag through the dedicated tunnel
Include：
Report tunnel building completion message；
After receiving the routing iinformation for specific protocol type, record corresponding with the specific protocol type through institute
State the special policybased routing of dedicated tunnel.
Alternatively, the dedicated router is Level 2 Tunnel Protocol L2TP server；
The tunnel building information includes：
L2TP client configuration informations：The user name of client, password and virtual interface IP address；
L2TP server end configuration informations：The user name of server end, password and virtual interface IP address.
Alternatively, the special policybased routing through the dedicated tunnel includes：Specific five-tuple information and special road
By the virtual interface IP address of device.
As shown in figure 4, embodiments providing a kind of device of transmission data, controller is applied to, including：
Packet parsing module 401, receives after the message of message protocol type, by described for receiving for identification
Message carries out the protocol type that deep-packet detection determines the message；
Routing configuration module 402, for when the message for predefined type protocol massages when, it is determined that and issue with it is described
The corresponding special policybased routing of five-tuple information carried in message, for carrying the message of the five-tuple information in network
The forwarding of forward node.
Alternatively, routing configuration module 402, for determining and issue with the message carry five-tuple information it is corresponding
Special policybased routing, including：
It is determined that from the forwarded node to the tunnel building information of the dedicated tunnel dedicated router, and issue
To the forwarded node.
Alternatively, routing configuration module 402, for determining and issue with the message carry five-tuple information it is corresponding
Special policybased routing, also include：
After the tunnel building completion message that the forwarded node is reported is received, the association of the predefined type is determined
The corresponding special policybased routing through the dedicated tunnel of view, and it is handed down to the forwarded node.
Alternatively, the dedicated router is Level 2 Tunnel Protocol L2TP server；
The tunnel building information includes：
L2TP client configuration informations：The user name of client, password and virtual interface IP address；
L2TP server end configuration informations：The user name of server end, password and virtual interface IP address.
Alternatively, the special policybased routing through the dedicated tunnel includes：Specific five-tuple information and special road
By the virtual interface IP address of device
The embodiment of the present invention additionally provides a kind of system for realizing flow redirection, including above-mentioned forwarded node and control
Device processed.
Example one
Software defined network (Software Defined Network, SDN) technology is utilized in following examples of the present invention,
By the way that network equipment chain of command and data surface are separated, flexible control and the Intelligent Selection of pipeline of network traffics is realized
Select.In this example, used as forwarded node, SDN controllers are used as controller for gateway.
A kind of corresponding typical SDN system structure of this example as shown in figure 5, including：
Multiple gateways, schematically show three (gateway A, gateway B, gateway C), in other embodiments in Fig. 5
Can be other quantity；
SDN controllers：Interacting for infomational message is managed between each gateway；
Wherein：SDN controllers can be given by the management information such as OF (open flow) distributing policies in Fig. 6 and application
Each gateway；And each gateway reports useful information to give SDN controllers by netconf interfaces, by OF Agent (OF agencies)
The management information from SDN controllers is received, and be recorded in conversational list Session；
Router：The message for receiving is forwarded according to route forwarding table, in figure by taking RouterA, RouterB as an example
Illustrate；
File server：The user side that is stored with is uploaded or Downloadable file, and FTP is shown schematically as in Fig. 5
(File Transfer Protocol, file transfer protocol (FTP)) server.
Network system for above-mentioned SDN does a supplementary notes：Each gateway (for example, gateway A, gateway B, gateway in Fig. 5
C the service message interaction that also likely to be present between) between service interaction, but gateway can be with using any mode of the prior art
To realize, it is not related to also not repeat herein, the management information interaction between gateway and SDN controllers is related generally to herein.
Based on the network structure shown in Fig. 5, the method that the flow proposed in the embodiment of the present invention described in detail below is redirected, its
In, for ease of illustrating, flow between the gateway A and ftp server only with the IP address shown in Fig. 5 as 192.168.1.1
Illustrate as a example by redirection, need the method for carrying out flow redirection similar between remaining each gateway and file server.
As shown in fig. 7, a kind of method of transmission data may comprise steps of：
Step S701:Gateway A obtains local ip address 192.168.1.1；
In this step, gateway is obtained local ip address and can be matched somebody with somebody by the CLI/WEB (order line/web page) in Fig. 2
Put the point-to-point protocol (Point-to-Point Potocol over Ethernet, PPPoE) based on Ethernet dial it is laggard
Row PPPoE dials；Or DHCP is configured by the CLI/WEB (order line/web page) in Fig. 2
Automatic DHCP configurations are carried out after (Dynamic Host Configuration Protocol, DHCP)；Or can also adopt quiet
Other known IP address methods of salary distribution of the mode of state configuration or those of ordinary skill in the art；
Step S702:Gateway A is obtained after IP address, and local ip address 192.168.1.1 is reported into SDN controllers, SDN
Controller is set up with gateway A using IP address 192.168.1.1 and is connected, and issues flow table to gateway A according to preset strategy；
By above-mentioned steps S701 and step S702, management passage, SDN can be set up between SDN controllers and gateway A
Controller can be by (for example, Link Layer Discovery Protocol (the Link Layer of any of mode in prior art
Discovery Protocol, LLDP) message forwarding etc.) physical topological structure of whole network is obtained, and issue flow table control
Make the current business interactive link of each gateway.
Step S703：Gateway A updates local Session tables (conversational list) according to flow table, and according to conversational list with it is adjacent
Apparatus for network node sets up general service forwarding channel；
In this step, after SDN controllers and gateway A set up connection, the flow table that gateway A is issued according to SDN controllers
Local session table is updated, with adjacent apparatus for network node business forwarding channel is formed.For example, from the wan0 mouths (port of gateway A
Address：10.0.0.1 the data for) forwarding all are forwarded to router RouterB, then proceed forwarding by RouterB.
Step S704：When gateway A receives its accessing user, (for example, the IP address in Fig. 1 is：192.168.1.2
User) data message send request, judge whether five-tuple information entrained in the message is new five-tuple information, such as
It is really, execution step S705, if not, execution step S713.
In this step, if to be not present in gateway A current for five-tuple information entrained in the data message for receiving
Conversational list, then judge that five-tuple information entrained in the message is new five-tuple information.
S705, gateway A will be given for recognizing by netconf interfaces on multiple data messages of message protocol type
SDN controllers；
In this step, the message number for reporting SDN controllers only needs to identify the message association received by gateway A
View type, generally for remaining able to ensure correctness in the case where transmitting compared with low discharge, more preferably, in message number
20 messages can be selected when measuring more；Certainly, greater number of message or whole message are all reported to the SDN controllers to be also
Can with, simply occupy more Internet resources.
Step S706, SDN controllers carry out deep-packet detection (Deep Packet to received data message
Inspection, DPI), determine whether the message is predetermined protocol message, if it is, execution step S707；Otherwise, perform
Step S714.
In this step, predetermined protocol message is illustrated with File Transfer Protocol message, and whether the message for receiving is FTP associations
View message can determine in the following manner：
When in the data flow identified by DPI, the destination interface of control passage is 21, then the agreement letter of the data flow
Cease for File Transfer Protocol, what is thus completed is the File Transfer Protocol message identification of control passage；
Or consult in advance when the five-tuple information of the data flow identified by DPI meets predetermined control passage the inside
The five-tuple information of good data channel, then the protocol information for just marking the data flow is File Transfer Protocol, and what is thus completed is
The File Transfer Protocol message identification of data channel.
Step S707：SDN controllers are issued to gateway A and set up Layer 2 Tunneling Protocol by OF (open flow)
The tunnel building information that (LayerTwoTunnelingProtocol, L2TP) tunnel needs includes：
(1) user name of L2TP clients, password；(2) user name of L2TP servers, password；(3) L2TP Tunnel is set up
Virtual interface (wan1 mouths) IP address of L2TP clients in two virtual ip addresses, i.e. Fig. 1 needing：192.168.100.2 and
L2TP server virtual interface IP address：192.168.100.1.
In this step, the tunnel building information for setting up L2TP Tunnel needs can be by gateway A before SDN controllers are issued
Active user's configuration generate, i.e. SDN controllers judge externally to show configuration interface when needing to set up dedicated tunnel, by gateway A
Active user according to practical situation outside input configuration generate；Can also be stored in advance in SDN controllers, with gateway A
Address be that index condition is uniquely set up；
Step S708：Gateway A is received after the tunnel building information for setting up L2TP Tunnel needs, and L2TP servers are needed
Username and password, and two virtual interface IP address are sent to RouterA by message.
In this step, for the message transformat between gateway A and RouterA is not limited, as long as institute can be transmitted
The information of needs, and RouterA can be another router for specially arranging to set up dedicated tunnel, or
Another relatively low router of converting flow, here is not made and being particularly limited to.RouterA in this example, actually uses
In the dedicated router for setting up dedicated tunnel.
Step S709：RouterA according to the tunnel building information for receiving automatically configure L2TP servers user name and
Password, and two virtual interface IP address, this completes gateway A RouterA is serviced as L2TP as L2TP clients
The information configuration process at device end,
By above-mentioned step S707-S709, gateway A establishes L2TP tunnels according to the configuration information that SDN controllers are issued
Road；
Step S710：Gateway A is had built up by netconf interface notification SDN controller L2TP Tunnel and is completed.
Step S711：SDN controllers obtain L2TP Tunnel and have built up after the notice for completing, by under OF (Openflow)
Issue one routing iinformation of gateway A i.e. (five-tuple information+next-hop virtual interface ip：192.168.100.1) remember as in gateway A
The policybased routing corresponding to specific five-tuple information of record.
Step S712：By message (specific five-tuple infomational message), strategically routed encapsulation is L2TP message lattice to gateway A
Send into dedicated tunnel (L2TP Tunnel) after formula to be transmitted.
In this step, i.e.,：Through gateway A wan1 mouths->RouterA->The path of ftp server.Wherein, known
In the case of transmitting path the encapsulation format and encapsulated content of L2TP messages be known to the skilled artisan, herein also no longer
Describe in detail.
Step 713：Forwarded according to the forwarding strategy corresponding to the five-tuple information that gateway is recorded.
In this step, if forwarding strategy now is the policybased routing of specific five-tuple information, strategically road
By being encapsulated as after L2TP message formats being transmitted according to feeding dedicated tunnel (L2TP Tunnel), otherwise, according to common message
Forwarding route is forwarded.
Step 714：SDN controllers indicate gateway A by being forwarded still according to general service forwarding channel, i.e. according to
Session information in conversational list is forwarded.
In the above embodiment of the present invention, if from ftp server downloading flow big file when through RouterB,
Because there is other flows therebetween, speed of download will substantially be limited, and be directed to File Transfer Protocol message and set up designated lane
Shunting forwarding is carried out through RouterA after L2TP Tunnel, due to the specificity of tunnel converting flow, will necessarily accelerate transmission speed
Degree.Thus, said process realizes the redirection transmitting procedure of FTP data, improves network data transmission speed.Due to DPI
Realize in SDN controllers side, it is relatively low for the requirement of gateway so that simpler flexibly in gateway side networking.
Above-mentioned example utilize SDN technologies, network equipment chain of command and data surface are separated, gateway by using
Netconf interfaces send the message for carrying out deep-packet detection DPI on SDN controllers, by SDN controllers to the message that above send
DPI detections are carried out, route is determined according to the result that DPI is detected, flow table is configured by openflow and realizes that flow is redirected, carried
Rise network data transmission efficiency.
One of ordinary skill in the art will appreciate that all or part of step in said method can be instructed by program
Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read only memory, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits, accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, it would however also be possible to employ the shape of software function module
Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.
It should be noted that the present invention can also have other various embodiments, without departing substantially from spiritual and its essence of the invention
In the case of, those of ordinary skill in the art can make various corresponding changes and deformation according to the present invention, but these are corresponding
Change and deform the protection domain that should all belong to appended claims of the invention.
Claims (21)
1. a kind of method of transmission data, is applied to forwarded node, including：
When five-tuple information entrained in the data message for receiving is locally stored, and there is corresponding special strategy
During route, forwarded according to the special policybased routing；
When five-tuple information entrained in the data message for receiving is not when locally stored, build for the five-tuple information
Special policybased routing is found, is forwarded according to the special policybased routing.
2. the method for claim 1, it is characterised in that：
It is described to set up special policybased routing for the five-tuple information and include：
Report the message for receiving message protocol type for identification；
After the tunnel building information that dedicated tunnel is set up with dedicated router is received, set up according to the tunnel building information
With the dedicated tunnel between the dedicated router, it is determined that through the special policybased routing of the dedicated tunnel；
Wherein, the dedicated tunnel with corresponding to specific five-tuple information.
3. method as claimed in claim 2, it is characterised in that：
It is described to determine that the special policybased routing through the dedicated tunnel includes：
Report tunnel building completion message；
After receiving the routing iinformation for specific protocol type, record corresponding with the specific protocol type through described special
With the special policybased routing in tunnel.
4. method as claimed in claim 2 or claim 3, it is characterised in that：
The dedicated router is Level 2 Tunnel Protocol L2TP server；
The tunnel building information includes：
L2TP client configuration informations：The user name of client, password and virtual interface IP address；
L2TP server end configuration informations：The user name of server end, password and virtual interface IP address.
5. method as claimed in claim 4, it is characterised in that：
The special policybased routing through the dedicated tunnel includes：The virtual interface of specific five-tuple information and dedicated router
IP address.
6. a kind of method of transmission data, is applied to controller, including：
Receive and received after the message of message protocol type for identification, by carrying out deep-packet detection to the message institute is determined
State the protocol type of message；
When protocol massages of the message for predefined type, it is determined that and issuing and the five-tuple information pair carried in the message
The special policybased routing answered, for carrying the forwarding of the message in forwarded node of the five-tuple information.
7. method as claimed in claim 6, it is characterised in that：
The determination simultaneously issues special policybased routing corresponding with the five-tuple information carried in the message, including：
It is determined that from the forwarded node to the tunnel building information of the dedicated tunnel dedicated router, and it is handed down to institute
State forwarded node.
8. method as claimed in claim 7, it is characterised in that：
The determination simultaneously issues special policybased routing corresponding with the five-tuple information carried in the message, also includes：
After the tunnel building completion message that the forwarded node is reported is received, the agreement pair of the predefined type is determined
The special policybased routing through the dedicated tunnel answered, and it is handed down to the forwarded node.
9. method as claimed in claim 7 or 8, it is characterised in that：
The dedicated router is Level 2 Tunnel Protocol L2TP server；
The tunnel building information includes：
L2TP client configuration informations：The user name of client, password and virtual interface IP address；
L2TP server end configuration informations：The user name of server end, password and virtual interface IP address.
10. method as claimed in claim 9, it is characterised in that：
The special policybased routing through the dedicated tunnel includes：The virtual interface of specific five-tuple information and dedicated router
IP address.
A kind of 11. devices of transmission data, are applied to forwarded node, including：
First data forwarding module, for locally depositing when five-tuple information entrained in the data message for receiving
Storage, and when having corresponding special policybased routing, forwarded according to the special policybased routing；
Second data forwarding module, for when five-tuple information entrained in the data message for receiving is not locally stored
When, special policybased routing is set up for the five-tuple information, forwarded according to the special policybased routing.
12. devices as claimed in claim 11, it is characterised in that：
Second data forwarding module, includes for setting up special policybased routing for the five-tuple information：
Report the message for receiving message protocol type for identification；
After the tunnel building information that dedicated tunnel is set up with dedicated router is received, set up according to the tunnel building information
With the dedicated tunnel between the dedicated router, it is determined that through the special policybased routing of the dedicated tunnel；
Wherein, the dedicated tunnel with corresponding to specific five-tuple information.
13. devices as claimed in claim 12, it is characterised in that：
Second data forwarding module, for determining that the special policybased routing through the dedicated tunnel includes：
Report tunnel building completion message；
After receiving the routing iinformation for specific protocol type, record corresponding with the specific protocol type through described special
With the special policybased routing in tunnel.
14. devices as described in claim 12 or 13, it is characterised in that：
The dedicated router is Level 2 Tunnel Protocol L2TP server；
The tunnel building information includes：
L2TP client configuration informations：The user name of client, password and virtual interface IP address；
L2TP server end configuration informations：The user name of server end, password and virtual interface IP address.
15. devices as claimed in claim 14, it is characterised in that：
The special policybased routing through the dedicated tunnel includes：The virtual interface of specific five-tuple information and dedicated router
IP address.
A kind of 16. devices of transmission data, are applied to controller, including：
Packet parsing module, receives after the message of message protocol type, by entering to the message for receiving for identification
Row deep-packet detection determines the protocol type of the message；
Routing configuration module, for when the message for predefined type protocol massages when, it is determined that and issue with the message
The corresponding special policybased routing of five-tuple information of carrying, for carrying the message of the five-tuple information in forwarded section
The forwarding of point.
17. devices as claimed in claim 16, it is characterised in that：
Routing configuration module, for determining and issues and the corresponding special tactful road of five-tuple information carried in the message
By, including：
It is determined that from the forwarded node to the tunnel building information of the dedicated tunnel dedicated router, and it is handed down to institute
State forwarded node.
18. devices as claimed in claim 17, it is characterised in that：
Routing configuration module, for determining and issues and the corresponding special tactful road of five-tuple information carried in the message
By also including：
After the tunnel building completion message that the forwarded node is reported is received, the agreement pair of the predefined type is determined
The special policybased routing through the dedicated tunnel answered, and it is handed down to the forwarded node.
19. the device as described in claim 17 or 18, it is characterised in that：
The dedicated router is Level 2 Tunnel Protocol L2TP server；
The tunnel building information includes：
L2TP client configuration informations：The user name of client, password and virtual interface IP address；
L2TP server end configuration informations：The user name of server end, password and virtual interface IP address.
20. devices as claimed in claim 19, it is characterised in that：
The special policybased routing through the dedicated tunnel includes：The virtual interface of specific five-tuple information and dedicated router
IP address.
A kind of 21. systems of transmission data, including the forwarded node as any one of claim 11-15, and
Controller as any one of claim 16-20.
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