CN105871624B - Independent of transmission method in the dynamic SDN control signaling band of control private network - Google Patents
Independent of transmission method in the dynamic SDN control signaling band of control private network Download PDFInfo
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- CN105871624B CN105871624B CN201610347998.1A CN201610347998A CN105871624B CN 105871624 B CN105871624 B CN 105871624B CN 201610347998 A CN201610347998 A CN 201610347998A CN 105871624 B CN105871624 B CN 105871624B
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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
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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
- 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 transmission methods in a kind of dynamic SDN control signaling band independent of control private network, when disposing SDN network, SDN controller need to be only directly connected to one or several SDN switches of data surface, the control data interaction between SDN controller and the SDN switch of indirect connection is realized in forwarding by SDN switch to control signaling；The control unit interface defined in SDN switch can carry out dynamic configuration, discord hardware interface binding, for sending openflow message to SDN controller by correct interface based on network topology；Forwarding of the SDN switch to control signaling is completed dependent on the flow entry configured for SDN switch.The present invention eliminates SDN network and operates normally to the independent dependence for controlling private network, improves the deployment adaptability of SDN network, can be effectively reduced the lower deployment cost and complexity of SDN network.
Description
Technical field
The present invention relates to transmission methods in a kind of dynamic SDN control signaling band independent of control private network.
Background technique
Software defined network (SDN) technology is that one kind has broken traditional network organizations mode, have in logic concentrate,
The completely new network architecture of the features such as control and forward separating, interface opening and software definition.The normal operation of SDN network
Dependent on the SDN controller for concentrating deployment, SDN controller establishes connection with all SDN switches of the whole network by exit passageway,
Carrying and transmission for control signaling between controller and interchanger.Exit passageway generallys use the control private network independently disposed
It realizes, control private network is independently of SDN data surface, the network not controlled by SDN controller.Control private network is individually set up, for
Large-scale SDN network deployment, may bring the problems such as wiring difficulty increases, cost rises rapidly, the industry for SDN system
Change and realizes that there is certain negative factor with large scale deployment.
Summary of the invention
In order to overcome the disadvantages mentioned above of the prior art, the present invention provides a kind of dynamic SDN independent of control private network
Transmission method in control signaling band, solution is to be dynamically completed data based on network topology under openflow protocol frame
Network directly carries the problem of SDN control signaling, to realize in network large scale deployment and erection, does not need to build independence
Control private network effect, play save construction cost, simplify the network architecture, improve communication control efficiency effect.
The technical solution adopted by the present invention to solve the technical problems is: a kind of dynamic SDN independent of control private network
Transmission method in control signaling band, when disposing SDN network, SDN controller need to only be exchanged with one or several SDN of data surface
Machine is directly connected to, the forwarding by SDN switch to control signaling, realizes the SDN switch of SDN controller and indirect connection
Between control data interaction；The control unit interface defined in SDN switch can carry out dynamic configuration based on network topology, no
It is bound with hardware interface, for sending openflow message to SDN controller by correct interface；SDN switch is to control
The forwarding of signaling is completed dependent on the flow entry configured for SDN switch.
Compared with prior art, the positive effect of the present invention is: eliminating SDN network and operates normally to independent control specially
The dependence of net, hence it is evident that improve the deployment adaptability of SDN network, can be effectively reduced SDN network lower deployment cost and
Complexity has actual engineering significance to the large-scale application of SDN technology.
Detailed description of the invention
Examples of the present invention will be described by way of reference to the accompanying drawings, in which:
Fig. 1 is netinit sequential schematic of the invention；
Fig. 2 is the control unit interface schematic diagram of determination interchanger of the invention；
Fig. 3 is netinit flow diagram of the invention.
Specific embodiment
Aiming at the problem that existing SDN system is necessarily dependent upon control private network completion control signaling transmission, the present invention provides
One kind being not need to rely on control private network, and SDN control signaling can be realized in SDN controller and SDN using with interior transmission mode
The method communicated between interchanger, SDN network do not need to dispose independent control private network, SDN controller and the whole network in deployment
Straight-forward network connection is needed not exist between all SDN switches, SDN controller only need to be with one or several SDN of data surface
Interchanger is directly connected to, the forwarding by SDN switch to control signaling, realizes that the SDN of SDN controller and indirect connection is handed over
Control data interaction between changing planes, thus reach independent of the control net independently set up to all SDN switches of the whole network into
The purpose of row control.
SDN switch work has IP address, can be connect by its any business datum in network layer, business datum interface
Mouth receives and processes openflow message, and the control unit interface defined on interchanger can carry out dynamic based on network topology and match
It sets, discord hardware interface binding, for sending openflow message to controller by correct interface.
Forwarding of the SDN switch to control signaling, dependent on the normal exchange logic of SDN, that is, depending on is SDN switch
The flow entry of configuration is completed, without depending on additional dynamic routing protocol or System Routing Table, the configuration process of flow entry
Occur in the netinit stage.
In the netinit stage, it, according to sequence from the near to the distant, is the whole network that SDN controller, which is needed according to full mesh topology,
All SDN switch Configuration network initialization flow list items, it is ensured that there are reachable between SDN controller and all interchangers of the whole network
Communication link can be used as exit passageway, carry the control signaling interacted between SDN controller and SDN switch.Wherein:
(1) sequence from the near to the distant is determined based on minimal spanning tree algorithm: using SDN controller and SDN switch as figure
In node, side of the link as figure between controller and interchanger obtains the figure of entire SDN network.It is with SDN controller
Root node, the weight on all sides are 1, minimum spanning tree are calculated, according to SDN switch in minimum spanning tree and SDN controller
Distance sorts all SDN switches, is divided into the 1st jump interchanger, the 2nd jump interchanger, the 3rd jump interchanger etc., until completing to give birth to
It is traversed at tree, covers all SDN switches of the whole network.
(2) configuration method of netinit stage flow entry, it can be ensured that SDN controller skips to n-th by configuring the 1st
The flow entry of interchanger is jumped, the two-way communication between the (n+1)th jump interchanger is established, flow entry configuration is opened from the 1st jump interchanger
Begin, is respectively configured from SDN controller to the 2nd and jumps interchanger and from the 2nd jump interchanger to the double-direction control Business Stream of SDN controller
List item；Then interchanger is jumped in configuration the 1st simultaneously and the 2nd jumps interchanger, and configuration jumps interchanger and from the 3rd from SDN controller to the 3rd
Interchanger is jumped to the double-direction control Business Stream list item of SDN controller, until the configuration of the whole network interchanger finishes, SDN controller is established
With the control message communication channel between all SDN switches of the whole network.
It, should be able to be by opening again when network topology changes, and original control signaling transmission channel is caused to be destroyed
Dynamic netinit process, realize based on change in topology with interior Transmission system dynamic self-adapting.
SDN switch works at three layers, and general service data-interface can be used and receive SDN control message, receives SDN control
The purpose IP address of message processed is the IP address of each business datum interface.As shown in Figure 1 to Figure 3, SDN controller is completed to complete
Net all SDN switches control channel initialization specifically includes the following steps:
Step 1 is abstracted full mesh topology, by SDN controller c1 and SDN switch si, wherein i=1,2 ... 5,
It is abstracted as the node of figure, the communication link between controller and interchanger and between interchanger and interchanger is abstracted as figure
In side, the weight on side is 1；
Step 2 is based on minimal spanning tree algorithm, using SDN controller as root, the whole network minimum spanning tree is generated, according to minimum
SDN switch, by all SDN exchange sorts, is divided into the 1st jump interchanger s1, the 2nd jump at a distance from SDN controller in spanning tree
Interchanger s4, the 4th jump interchanger s5 are jumped in interchanger s2 and s3, the 3rd, and until completing spanning tree traversal, all SDN of covering the whole network are handed over
It changes planes.
Minimal spanning tree algorithm can customize, and in network configuration there are when other demands, can also be not limited to minimum generation
Tree algorithm, using common spanning tree algorithm.
Step 3, since the 1st jump interchanger, SDN switch flow entry is configured, it is ensured that SDN controller with should
It being capable of normal interactive controlling message between the 2nd jump interchanger under branch；
Step 4 configures the flow entry of the 1st, 2 jump interchanger, it is ensured that the under SDN controller and the branch the 3rd jumps
It being capable of normal interactive controlling message between interchanger；
Step 5 repeats this process, by configuring the 1st flow entry for skipping to the n-th jump interchanger, establishes to jump with (n+1)th and hand over
Two-way communication between changing planes, until completing the traversal to all SDN switches of the whole network, it is ensured that SDN controller and the whole network are all
Control message communication connection is established between SDN switch.
When being configured based on minimum spanning tree to interchanger, traversal order be can customize, and need to only be ensured to a certain node
When being configured, all telephone net nodes on the node to root node path have been configured to finish, and traversal order can be stringent
According to breadth first traversal { S1, S2, S3, S4, S5 }, can also using depth-first traversal sequence { S1, S3, S2, S4, S5 } or
{S1,S2,S4,S5,S3}。
The flow entry of SDN switch is configured, is completed by flow mod message, the flow entry matching domain of configuration makes
With TCP port number and purpose IP address, the purpose equipment that openflow agreement and determining agreement are sent for identification, movement is mainly
It is handled including output, TTL and MAC Address, for completing normal message forwarding behavior.
While to the configuration of SDN switch flow entry, the initialization to its control unit interface is completed, initialization strategy is will
The physical interface that last time receives openflow protocol message is dynamically configured as the control unit interface of SDN switch.
Step 6 restarts step 1 when network topology change, carries out dynamic certainly with interior configured transmission to the whole network
Adapt to adjustment.
Claims (4)
1. transmission method in a kind of dynamic SDN control signaling band independent of control private network, it is characterised in that: in deployment SDN
When network, SDN controller need to be only directly connected to one or several SDN switches of data surface, by SDN switch to control
The control data interaction between SDN controller and the SDN switch of indirect connection is realized in the forwarding of signaling；In SDN switch
The control unit interface of definition can carry out dynamic configuration, discord hardware interface binding, for by correct based on network topology
Interface sends openflow message to SDN controller；Forwarding of the SDN switch to control signaling, matches dependent on for SDN switch
The flow entry set is completed；The configuration process of the flow entry is completed in the netinit stage, is included the following steps:
Step 1 is abstracted full mesh topology, and SDN controller and SDN switch are abstracted as to the node of figure, by controller with
Communication link between interchanger and between interchanger and interchanger is abstracted as the side in figure, and the weight on side is 1；
Step 2 is based on minimal spanning tree algorithm, using SDN controller as root, generates the whole network minimum spanning tree, is generated according to minimum
SDN switch sorts all SDN switches at a distance from SDN controller in tree, and until completing spanning tree traversal, covering is complete
Net all SDN switches；
Step 3 configures SDN switch flow entry since the 1st jumps interchanger, it is ensured that SDN controller is jumped with the 1st
Interchanger is jumped in the 2nd under same branch being capable of normal interactive controlling message between interchanger；
Step 4 configures the flow entry of the 1st, 2 jump interchanger, it is ensured that SDN controller jumps interchanger same with the 1st
It being capable of normal interactive controlling message between the 3rd jump interchanger under branch；
Step 5 repeats step 4, by configuring the 1st flow entry for skipping to the n-th jump interchanger, establishes and jumps interchanger with (n+1)th
Between two-way communication, until completing to the traversals of all SDN switches of the whole network, it is ensured that SDN controller and all SDN of the whole network are handed over
Control message communication connection is established between changing planes；
Step 6 restarts step 1 when network topology change, moves to configured transmission in the control signaling band of the whole network
State adaptively adjusts.
2. transmission method in the dynamic SDN control signaling band according to claim 1 independent of control private network, feature
Be: when being configured based on minimum spanning tree to interchanger, traversal order includes breadth first traversal and depth-first traversal.
3. transmission method in the dynamic SDN control signaling band according to claim 1 independent of control private network, feature
It is: when being configured to the flow entry of SDN switch, is completed by flow mod message, the flow entry matching domain of configuration makes
With TCP port number and purpose IP address, the purpose equipment of openflow agreement and determining agreement transmission, movement for identification includes
Output, TTL and MAC Address processing, for completing normal message forwarding behavior.
4. transmission method in the dynamic SDN control signaling band according to claim 1 independent of control private network, feature
It is: while configuring to SDN switch flow entry, completes the initialization to its control unit interface, initialization strategy is will
The physical interface that last time receives openflow protocol message is dynamically configured as the control unit interface of SDN switch.
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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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| CN105871624B true CN105871624B (en) | 2019-07-16 |
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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 |
| CN117640335B (en) * | 2024-01-26 | 2024-04-16 | 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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