CN105871624A - Dynamic SDN (software defined network) control signaling in-band transmission method independent of private control network - Google Patents
Dynamic SDN (software defined network) control signaling in-band transmission method independent of private control network Download PDFInfo
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- CN105871624A CN105871624A CN201610347998.1A CN201610347998A CN105871624A CN 105871624 A CN105871624 A CN 105871624A CN 201610347998 A CN201610347998 A CN 201610347998A CN 105871624 A CN105871624 A CN 105871624A
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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
- H04L45/02—Topology update or discovery
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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
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0806—Configuration setting for initial configuration or provisioning, e.g. plug-and-play
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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
- H04L41/12—Discovery or management of network topologies
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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
- H04L45/48—Routing tree calculation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/25—Routing or path finding in a switch fabric
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/25—Routing or path finding in a switch fabric
- H04L49/253—Routing or path finding in a switch fabric using establishment or release of connections between ports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a dynamic SDN (software defined network) control signaling in-band transmission method independent of a private control network. According to the method, when an SDN is deployed, an SDN controller is only required to be directly connected with one or more SDN exchangers on a data surface, and control data interaction between the SDN controller and non-directly connected SDN exchangers is realized through control signaling forward by the aid of the SDN exchangers; controller interfaces defined on the SDN exchangers can perform dynamic configuration based on network topology, are not bound with hardware interfaces and are used for sending openflow massages to the SDN controller through correct interfaces; the control signaling forward completed by the SDN exchangers is dependent on flow entries configured for the SDN exchangers. According to the dynamic SDN control signaling in-band transmission method independent of the private control network, dependency of normal SDN operation on the independent private control network is eliminated, the deployment adaptability of the SDN is improved, and deployment cost and complexity of the SDN can be effectively reduced.
Description
Technical field
The present invention relates to transmission method in a kind of dynamic SDN control signaling band not relying on and controlling private network.
Background technology
Software defined network (SDN) technology is that one has broken legacy network organizations mode, has and patrols
Collect the brand-new network system frame of the features such as upper concentration, control and forward separating, interface opening and software definition
Structure.Properly functioning the depending on of SDN concentrates the SDN controller disposed, and SDN controller is by peace
Full tunnel, SDN switch all with the whole network are set up and are connected, for controlling letter between controller and switch
The carrying of order and transmission.Escape way generally uses the control private network of independent deployment to realize, and it is only for controlling private network
Stand on SDN data surface, the network not controlled by SDN controller.Individually set up and control private network, for greatly
The SDN of scale is disposed, and may bring the problems such as wiring difficulty increase, cost rising rapidly, for
The realization of industrialization of SDN system and large scale deployment have certain negative factor.
Summary of the invention
In order to overcome the disadvantages mentioned above of prior art, the invention provides a kind of not relying on and control the dynamic of private network
State SDN controls transmission method in signaling band, and solution is under openflow protocol frame, based on net
Network topology is dynamically completed data network and directly carries the problem of SDN control signaling, thus realizes big at network
Scaledeployment and when setting up, it is not necessary to build the independent effect controlling private network, play saving construction cost,
Simplify the network architecture, the effect of raising Control on Communication efficiency.
The technical solution adopted for the present invention to solve the technical problems is: a kind of not relying on controls the dynamic of private network
State SDN controls transmission method in signaling band, and when disposing SDN, SDN controller only needs and data
One or several SDN switch in face is directly connected to, by the SDN switch forwarding to control signaling,
Realize the control data interaction between SDN controller and the SDN switch of indirect connection；SDN exchanges
The control unit interface defined on machine dynamically can configure based on network topology, discord hardware interface binding,
For sending openflow message by correct interface to SDN controller；SDN switch is to controlling letter
The forwarding of order, depends on the stream list item for SDN switch configuration and completes.
Compared with prior art, the positive effect of the present invention is: eliminate SDN properly functioning to solely
The vertical dependency controlling private network, hence it is evident that the deployment improving SDN adapts to ability, it is possible to effectively
Reduce lower deployment cost and the complexity of SDN, the large-scale application of SDN technology is had actual engineering
Meaning.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is the netinit sequential schematic of the present invention；
Fig. 2 is the control unit interface schematic diagram of the determination switch of the present invention；
Fig. 3 is the netinit schematic flow sheet of the present invention.
Detailed description of the invention
It is necessarily dependent upon control private network for existing SDN system and completes to control the problem of signalling, this
The bright one that provides is not need to rely on control private network, and in using band, transmission means can realize SDN control
The method that signaling communicates between SDN controller and SDN switch, SDN, when disposing, is not required to
Dispose independent control private network, need not exist between SDN controller and all SDN switch of the whole network
Straight-forward network connects, and SDN controller only need to be directly connected to one or several SDN switch of data surface,
By the SDN switch forwarding to controlling signaling, it is achieved SDN controller and the SDN of indirect connection
Control data interaction between switch, thus the whole network is owned by the Controling network reaching not rely on independent erection
The purpose that SDN switch is controlled.
SDN switch is operated in Internet, and business datum interface has IP address, it is possible to any by it
Business datum interface also processes openflow message, and the control unit interface that switch defines can base
Dynamically configure in network topology, discord hardware interface binding, be used for by correct interface to controller
Send openflow message.
The SDN switch forwarding to control signaling, depends on the normal exchange logic of SDN, i.e. depends on
Stream list item for SDN switch configuration completes, without depending on extra dynamic routing protocol or system
Routing table, the configuration process of stream list item occurred in the netinit stage.
In the netinit stage, SDN controller needs according to full mesh topology, according to order from the close-by examples to those far off,
Netinit stream list item is configured, it is ensured that SDN controller owns with the whole network for all SDN switch of the whole network
Exist between switch up to communication link, it is possible to as escape way, carrying SDN controller and SDN
Control signaling mutual between switch.Wherein:
(1) order from the close-by examples to those far off determines based on minimal spanning tree algorithm: by SDN controller and SDN
Switch is as the node in figure, and the link between controller and switch, as the limit of figure, obtains whole
The figure of SDN.With SDN controller as root node, the weights on all limits are 1, calculate minimum and generate
All SDN, according to the distance of SDN switch in minimum spanning tree Yu SDN controller, are exchanged by tree
Machine sorts, and is divided into the 1st jumping switch, the 2nd jumping switch, the 3rd jumping switch etc., until completing to generate
Tree traversal, covers all SDN switch of the whole network.
(2) collocation method of netinit stage stream list item, it can be ensured that SDN controller is by configuring
The 1st stream list item skipping to the n-th jumping switch, sets up the two-way communication between the (n+1)th jumping switch, stream
List item configuration is jumped from the beginning of switch from the 1st, be respectively configured from SDN controller to the 2nd jump switch and from
2nd jumps the switch double-direction control Business Stream list item to SDN controller；Configuration the most simultaneously the 1st jumping is handed over
Change planes and the 2nd jumping switch, configure and jump switch from SDN controller to the 3rd and jump switch from the 3rd
To the double-direction control Business Stream list item of SDN controller, until the configuration of the whole network switch is complete, SDN controls
The control message communicating passage between all SDN switch of the whole network set up by device.
When network topology change cause original control signaling transmission channel to be destroyed time, should be able to pass through
Restart netinit flow process, it is achieved in band based on change in topology, transmit system dynamics self adaptation.
SDN switch is operated in three layers, it is possible to use general service data-interface receives SDN and controls message,
Receive SDN and control the IP address that purpose IP address is each business datum interface of message.Such as Fig. 1 extremely
Shown in Fig. 3, SDN controller completes the control passage of SDN switch all to the whole network and initializes concrete bag
Include following steps:
Step one, carries out abstract to full mesh topology, by SDN controller c1 and SDN switch si, its
In, i=1,2 ... 5, the abstract node for figure, by between controller and switch, and switch and exchange
Communication link between machine is abstract for the limit in figure, and the weights on limit are 1；
Step 2, based on minimal spanning tree algorithm, with SDN controller as root, generates the whole network minimum and generates
All SDN, according to the distance of SDN switch in minimum spanning tree Yu SDN controller, are exchanged by tree
Sequence, be divided into the 1st jumping switch s1, the 2nd jump switch s2 and s3, the 3rd jump switch s4, the 4th
Jumping switch s5, until completing spanning tree traversal, covering all SDN switch of the whole network.
Minimal spanning tree algorithm can customize, when network configuration exists other demand, it is possible to be not limited to
Little spanning tree algorithm, uses common spanning tree algorithm.
Step 3, from the beginning of the 1st jumping switch, configures SDN switch stream list item, it is ensured that SDN
Can normal interactive controlling message between the 2nd jumping switch under controller and this branch；
Step 4, configures the 1st, the 2 stream list item jumping switch, it is ensured that SDN controller and this point
Can normal interactive controlling message between the 3rd jumping switch under Zhi；
Step 5, repeats this process, by configuring the 1st stream list item skipping to the n-th jumping switch, set up with
(n+1)th jumps the two-way communication between switch, until completing the traversal of SDN switch all to the whole network,
Guarantee that setting up control message communicating between all SDN switch of SDN controller and the whole network is connected.
When configuring switch based on minimum spanning tree, traversal order can customize, and only need to guarantee certain
When one node configures, all telephone net nodes on this node to root node path have been configured complete,
Traversal order can be in strict accordance with breadth first traversal { S1, S2, S3, S4, S5}, it would however also be possible to employ depth-first time
Go through order { S1, S3, S2, S4, S5} or { S1, S2, S4, S5, S3}.
The stream list item of SDN switch is configured, is completed by flow mod message, the stream table of configuration
Item matching domain uses tcp port number and purpose IP address, is used for identifying openflow agreement and determining agreement
The purpose equipment sent, action mainly includes that output, TTL and MAC Address process, has just been used for
Normal message forwarding behavior.
While SDN switch stream list item is configured, complete the initialization to its control unit interface, initially
Change strategy for the physical interface receiving openflow protocol message for the last time being dynamically configured as SDN exchange
The control unit interface of machine.
Step 6, when network topology change, restarts step one, enters transmitting parameter in the band of the whole network
Mobile state self-adaptative adjustment.
Claims (7)
1. the dynamic SDN not relying on control private network controls a transmission method in signaling band, and its feature exists
In: when disposing SDN, SDN controller only need to be with one or several SDN switch of data surface
Be directly connected to, by SDN switch to control signaling forwarding, it is achieved SDN controller with non-straight in succession
Control data interaction between the SDN switch connect；The control unit interface defined in SDN switch can
Dynamically configure based on network topology, discord hardware interface binding, be used for by correct interface to SDN
Controller sends openflow message；The SDN switch forwarding to control signaling, depends on and hands over into SDN
The stream list item configured of changing planes completes.
The dynamic SDN not relying on control private network the most according to claim 1 passes in controlling signaling band
Transmission method, it is characterised in that: the configuration process of stream list item completed in the netinit stage.
The dynamic SDN not relying on control private network the most according to claim 2 passes in controlling signaling band
Transmission method, it is characterised in that: described network initialization procedure comprises the steps:
Step one, carries out abstract to full mesh topology, by abstract to SDN controller and SDN switch for figure
Node, by between controller and switch, and the communication link between switch and switch is abstract for figure
In limit, the weights on limit are 1；
Step 2, based on minimal spanning tree algorithm, with SDN controller as root, generates the whole network minimum and generates
All SDN, according to the distance of SDN switch in minimum spanning tree Yu SDN controller, are exchanged by tree
Machine sorts, until completing spanning tree traversal, covers all SDN switch of the whole network；
Step 3, from the beginning of the 1st jumping switch, configures SDN switch stream list item, it is ensured that SDN
Can normal interactive controlling message between the 2nd jumping switch under controller and this branch；
Step 4, configures the 1st, the 2 stream list item jumping switch, it is ensured that SDN controller and this point
Can normal interactive controlling message between the 3rd jumping switch under Zhi；
Step 5, repeat step 4, by configuring the 1st stream list item skipping to the n-th jumping switch, set up with
(n+1)th jumps the two-way communication between switch, until completing the traversal of SDN switch all to the whole network,
Guarantee that setting up control message communicating between all SDN switch of SDN controller and the whole network is connected；
Step 6, when network topology change, restarts step one, passes in the control signaling band of the whole network
Defeated parameter carries out dynamic self-adapting.
The dynamic SDN not relying on control private network the most according to claim 3 passes in controlling signaling band
Transmission method, it is characterised in that: when configuring switch based on minimum spanning tree, traversal order includes extensively
Degree first traversal and depth-first traversal.
The dynamic SDN not relying on control private network the most according to claim 3 passes in controlling signaling band
Transmission method, it is characterised in that: when the stream list item of SDN switch is configured, disappeared by flow mod
Breath completes, and the stream table item matching domain of configuration uses tcp port number and purpose IP address, is used for identifying
Openflow agreement and determine the purpose equipment that agreement sends, action is with including output, TTL and MAC
Location processes, and has been used for normal message forwarding behavior.
The dynamic SDN not relying on control private network the most according to claim 3 passes in controlling signaling band
Transmission method, it is characterised in that: while SDN switch stream list item is configured, complete its controller
The initialization of interface, initializes strategy for will receive the physical interface of openflow protocol message for the last time
It is dynamically configured as the control unit interface of SDN switch.
The dynamic SDN not relying on control private network the most according to claim 2 passes in controlling signaling band
Transmission method, it is characterised in that: in the netinit stage, SDN controller foundation full mesh topology, according to
Order from the close-by examples to those far off, configures netinit stream list item for all SDN switch of the whole network, it is ensured that SDN
Exist between controller and all switches of the whole network up to communication link.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610347998.1A CN105871624B (en) | 2016-05-24 | 2016-05-24 | Independent of transmission method in the dynamic SDN control signaling band of control private network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610347998.1A CN105871624B (en) | 2016-05-24 | 2016-05-24 | Independent of transmission method in the dynamic SDN control signaling band of control private network |
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| CN105871624A true CN105871624A (en) | 2016-08-17 |
| CN105871624B CN105871624B (en) | 2019-07-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110912746A (en) * | 2019-11-28 | 2020-03-24 | 江苏电力信息技术有限公司 | Network link analysis method based on network topological graph |
| CN117640335A (en) * | 2024-01-26 | 2024-03-01 | 中铁七局集团西安铁路工程有限公司 | Dynamic adjustment and optimization method for intelligent building comprehensive wiring |
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| CN117640335A (en) * | 2024-01-26 | 2024-03-01 | 中铁七局集团西安铁路工程有限公司 | Dynamic adjustment and optimization method for intelligent building comprehensive wiring |
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| CN105871624B (en) | 2019-07-16 |
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