KR102385707B1 - SDN network system by a host abstraction and implemented method therefor - Google Patents

Abstract

The present invention relates to an SDN network system capable of maximizing the scalability of a hierarchical SDN network by constructing a network having a flexible network topology by abstracting a switch and a controller as well as a host connected thereto, and a method for implementing the same. It may include a switch unit and an SDN controller unit, and through this, even the host is abstracted to construct a network having a flexible network topology, thereby maximizing the scalability of the hierarchical SDN network.

Description

SDN network system by a host abstraction and implemented method therefor }

The present invention provides an SDN network system that increases scalability and manageability by abstracting not only the SDN controller and SDN switch but also the host connected thereto as a virtual machine in a hierarchical Software Defined Network (SDN)-based network and and its implementation method will be described.

SDN (Software Defined Network) separates the transport plane (or data plane) and the control plane of the network, and the transport plane is installed in the transport plane by querying the control plane for all decisions necessary for packet transmission. It refers to a technology that enables centralized control of network configuration and packet flow through software.

The current trend of SDN technology is not only in the construction of large SDN networks, but also in research and development of interworking between large SDN networks.

However, as the SDN network is layered as in the prior art, when an SDN network is constructed by abstracting only switches and controllers without abstraction of hosts, it is structurally serious as the information on hosts that the top controllers, especially the top controllers need to manage, increases exponentially. In general, scalability is degraded, which can cause network service interruption and failure.

An object of the present invention is to provide an SDN network system capable of maximizing the scalability of a hierarchical SDN network by constructing a network having a flexible network topology by abstracting a switch and a controller as well as a host connected thereto, and an implementation method thereof. .

According to an embodiment of the present invention, an SDN network system using host abstraction includes: a host unit including at least one host defined as a virtual machine using a representative network address and transmitting transmission data; SDN including at least one SDN switch defined as a virtual machine that directly transmits the data received from the host to the corresponding host, which is the receiving target, or transmits data, which is a packet including the transmission data, to the SDN controller. switch unit; And at least one SDN switch and at least one host are created as a virtual machine to implement a network topology according to the controller rule information, thereby establishing a subnetwork and transmitting the received packet data to the corresponding SDN controller or upper SDN controller. It may include an SDN controller unit including one SDN controller.

According to an embodiment of the present invention, the host unit is characterized in that the representative network address system is one of address concepts such as a classful address system, a Classless Inter-domain Routing (CIDR) address system, and a Locator Identifier Separate Protocol (LISP). can do.

According to an embodiment of the present invention, the SDN switch unit directly transmits the transmission data received from the host to the corresponding host when the corresponding host exists in the same subnetwork in order to transmit it to the corresponding host, and the corresponding host When it does not exist in the same subnetwork, it may be characterized in that data, which is a packet including the transmission data, is transmitted to the SDN controller.

According to an embodiment of the present invention, when the SDN controller is connected to an upper SDN controller, the SDN controller may serve as an SDN switch of the upper SDDN controller.

According to an embodiment of the present invention, the SDN controller unit includes: a flow analyzer configured to receive or interpret preset controller rule information to obtain network topology information; a virtual machine generator for generating at least one SDN switch constituting the sub-network and at least one host connected to the SDN switch as a virtual machine in order to construct a sub-network according to the acquired network topology information; If the SDN controller connected to the host receiving the received packet data is connected to the same upper SDN controller, it transmits packet-in data to the SDN controller. It may further include a data transmitter that is a packet for transmitting data that is a packet.

According to an embodiment of the present invention, the SDN controller may transmit data, which is a packet, to the upper SDN controller in a query format.

A method for implementing an SDN network using host abstraction according to an embodiment of the present invention includes: transmitting, by at least one host defined as a virtual machine, transmission data using a representative network address; transmitting the transmission data received from the host directly to the corresponding host in order to transmit the transmission data received from the host to the receiving target host, or transmitting data, which is a packet including the transmission data, to an SDN controller; and constructing a subnetwork by creating at least one SDN switch and at least one host as a virtual machine to implement a network topology according to the controller rule information, and transmitting the received packet data to the corresponding SDN controller or upper SDN controller. It may be characterized in that it includes.

According to an embodiment of the present invention, in the step of transmitting the transmission data, a representative network address system is a classful address system, a Classless Inter-domain Routing (CIDR) address system, and an address concept such as LISP (Locator Identifier Separate Protocol). It can be characterized as one.

According to an embodiment of the present invention, in the step of transmitting the packet data, the transmission data received from the host is transmitted directly to the corresponding host when the corresponding host exists in the same subnetwork in order to transmit it to the corresponding host, , when the corresponding host does not exist in the same subnetwork, data, which is a packet including the transmission data, may be transmitted to the SDN controller.

According to an embodiment of the present invention, the transmitting to the SDN controller may be characterized in that the SDN controller performs the role of an SDN switch of the upper SDDN controller when connected to the upper SDN controller.

According to an embodiment of the present invention, the transmitting to the SDN controller includes: receiving or interpreting preset controller rule information to obtain network topology information; creating, as a virtual machine, at least one SDN switch constituting the sub-network and at least one host connected to the SDN switch to construct a sub-network according to the acquired network topology information; If the SDN controller connected to the host receiving the received packet data is connected to the same upper SDN controller, it transmits packet-in data to the SDN controller. The method may further include transmitting data that is a packet.

According to an embodiment of the present invention, the transmitting to the SDN controller may include transmitting data, which is a packet to the upper SDN controller, in a query format.

In the present invention, in addition to abstracting the existing switches and controllers, in addition to abstracting the hosts connected thereto, in order to overcome the structurally severe deterioration in scalability as information on hosts to be managed by the top-level controller rapidly increases, There is an effect of maximizing the scalability of a hierarchical SDN network by constructing a network having a flexible network topology.

1 is a diagram illustrating a conventional hierarchical SDN network.
2 is a block diagram showing the configuration of an SDN network system using host abstraction according to an embodiment of the present invention.
3 is a detailed configuration diagram of the SDN controller shown in FIG. 2 .
4 is a diagram illustrating the connection of an SDN network system using host abstraction according to an embodiment of the present invention.
5 is a diagram illustrating the connection of an SDN network system using host abstraction according to an embodiment of the present invention using a classpool method as an IP address system.
6 is a diagram illustrating the connection of an SDN network system using host abstraction according to an embodiment of the present invention using a CIDR scheme as an IP address system.
7 is a flowchart of an SDN network implementation method using host abstraction according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. However, the present invention may be implemented in several different forms and is not limited to the embodiments described herein.

And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part "includes" a certain element, it means that other elements may be further included, rather than excluding other elements, unless otherwise stated.

Hereinafter, an SDN network system using host abstraction and an implementation method thereof according to an embodiment of the present invention will be described with reference to the drawings.

1 is a diagram illustrating a conventional hierarchical SDN network.

Referring to FIG. 1 , in the prior art, by implementing a layered SDN network by abstracting only switches and ports except for hosts, information on higher-level controllers, particularly hosts, which the upper-level controller must manage may rapidly increase.

As a result, there is a high possibility that the network itself has a structurally reduced scalability limit, which may cause network service interruption and failure.

2 is a block diagram of an SDN network system 1000 using host abstraction according to an embodiment of the present invention.

Referring to FIG. 2 , the SDN network system 1000 using host abstraction may include a host unit 100 , an SDN switch unit 200 , and an SDN controller unit 300 .

The host unit 100 may include at least one host defined as a virtual machine using the representative network address and transmit transmission data received from the user to the SDN switch.

Here, the host may mean a terminal capable of performing a centralized function to execute a program or data file and transmit it to another host in a computer network and long-distance communication.

In general, physical computing devices such as a computer, a server, and a mobile communication terminal may be used as the host, but according to an embodiment of the present invention, computing resources are obtained from a computing device such as a user terminal connected to the host or a server connected to the center, The host can be abstracted and created as a virtual machine.

Here, the abstraction is an abstraction layer including at least one virtual machine that integrates the computational resources of all types of devices into one single resource so as not to be bound by the type and supplier of the physical device, and uses the integrated computational resource to perform a purpose. may mean to build

According to an embodiment of the present invention, in order to abstract a host, a method of abstracting one or as many hosts as necessary using a representative network address may be used.

According to the embodiment, as the representative network address, an address concept such as a classful address system, a Classless Inter-domain Routing (CIDR) address system, and a Locator Identifier Separate Protocol (LISP) may be used, but is not limited thereto.

The SDN switch unit 200 transmits the transmission data received from the host directly to the corresponding host in order to transmit it to the corresponding host, which is a reception target, or generates packet-in data including the transmission data and transmits it to the SDN controller. It may include at least one SDN switch defined as a virtual machine.

Here, the SDN switch may refer to a device that software-controls and operates a network according to policies such as segmented traffic forwarding and packet processing received from the SDN controller.

According to an embodiment of the present invention, an SDN switch may be abstracted by acquiring computational resources from a computational device such as a connected user's terminal or a centrally connected server, and may be created as a virtual machine.

According to an embodiment of the present invention, at least one host included in the host unit 100 may be connected to the SDN switch in a 1:N relationship.

Here, the packet-in data may refer to data including transmission data received from a host and identification information on a transmission target of the transmission data.

According to an embodiment of the present invention, data that is an open flow-based packet may be used, but the present invention is not limited thereto.

According to an embodiment of the present invention, in order to transmit transmission data received from a host to a corresponding host, if the corresponding host exists in the same subnetwork, it is directly transmitted to the corresponding host, and if the corresponding host does not exist in the same subnetwork, SDN It is possible to transmit data, which is a packet including transmission data, to the controller.

Here, the sub-network may mean a network implemented by one SDN controller in a specific network topology form.

The SDN controller unit 300 builds a sub-network by creating at least one SDN switch and at least one host as a virtual machine so that a network topology is implemented according to the controller rule information, and transmits the received packet data to the corresponding SDN controller or higher level. It may include at least one SDN controller that transmits to the SDN controller.

According to an embodiment of the present invention, the controller rule information may mean information including, but not limited to, information on the structure, connection rules, and details of each component required for the SDN controller to configure the sub-network, but is not limited thereto. Any information necessary for network configuration may be used without limitation.

Here, the network topology may refer to the structure of network components constituting the network.

According to an embodiment of the present invention, a mesh type may be used as the network topology, but is not limited thereto, and a star type. Various network topologies such as bus type, circular type, tree type, etc. can be used.

The SDN controller unit 300 will be described in more detail with reference to FIG. 3 .

3 is a detailed configuration diagram of the SDN controller unit 300 shown in FIG.

Referring to FIG. 3 , the SDN controller unit 300 may include a flow analysis unit 310 , a virtual machine generation unit 320 , and a packet data transmission unit 330 .

The flow analysis unit 310 may acquire network topology information by analyzing received or preset controller rule information.

According to an embodiment of the present invention, the controller rule information may be preset, received from a network administrator, or received from a higher-level SDN controller.

According to an embodiment of the present invention, the network topology information may mean information on the network type and components to be formed by the SDN controller according to the controller rule information.

The virtual machine generator 320 may create at least one SDN switch constituting a sub-network and at least one host connected to the SDN switch as a virtual machine to construct a sub-network according to the acquired network topology information.

According to an embodiment of the present invention, a virtual machine may be created through the aforementioned abstraction method.

According to the above embodiment, at least one SDN switch and at least one host connected to the SDN switch are created as virtual machines through abstraction, each host and the SDN switch are connected in an N:1 correspondence, and connected to at least one host An SDN switch can be connected to an SDN controller in an N:1 correspondence.

The packet-in data transmitter 330 transmits packet-in data to the SDN controller when the SDN controller connected to the host host of the received packet-in data is connected to the same upper SDN controller, and transmits packet-in data to the SDN controller that is not connected to the same upper SDN controller In this case, data in packets can be transmitted to the corresponding upper-level SDN controller.

According to an embodiment of the present invention, the SDN controller may be connected to an SDN switch, and the SDN controller may also be connected to a higher-level SDN controller.

According to the above embodiment, when the SDN controller is connected to the upper SDN controller, it may serve as an SDN switch of the upper SDDN controller.

In addition, according to an embodiment of the present invention, data transmission as a packet to the upper SDN controller may be performed in the form of a query.

4 is a diagram illustrating the connection of an SDN network system using host abstraction according to an embodiment of the present invention.

Referring to FIG. 4 , the SDN controller may be hierarchically configured to manage the network in a centralized manner using the SDN switch.

According to an embodiment of the present invention, the flow table of the SDN switch may include a source IP and a destination IP or a hardware address (e.g., Mac Address).

According to an embodiment of the present invention, the SDN controller performs the role of an SDN switch including its abstract information when accessing the upper controller and can connect to the upper controller, and the SDN controller layer can be recursively configured without depth limitation. can

According to an embodiment of the present invention, when the network is initially configured, the network can be configured in the same way as the SDN network configuration method using the conventional technology by using an SDN controller having an abstraction module and a hierarchical connection function.

According to the above embodiment, in configuring the layer of the SDN network, a method in which a controller in charge of one sub-network abstracts its topology and connects to a higher-level controller as an SDN switch may be used.

According to the embodiment, the host abstraction can be implemented by using one of address concepts such as a classful address system, a Classless Inter-domain Routing (CIDR) address system, and a Locator Identifier Separate Protocol (LISP) as a representative network address system. , using a representative network address, hosts can be created by abstracting one or as many as needed.

According to an embodiment of the present invention, when one host transmits a packet to a host belonging to the same subnetwork, the transmission data acquired from the user is transmitted to the corresponding SDN switch in the same way as in the existing SDN network, but the host transmits a packet to another subnetwork , it is possible to generate data, which is a packet including transmission data, and transmit the generated packet, data, to the upper SDN controller.

According to the above embodiment, when the SDN controller receives a packet message, the SDN controller converts the SDN switch and at least one host connected to the SDN switch to a virtual machine according to the received or network topology information generated by interpreting preset controller rule information. After implementing the network by creating it, the flow message can be forwarded to the subordinate SDN controller or SDN switch.

At this time, since this flow message does not have information on the specific sub-topology, the sub-SDN controller converts it to include the sub-topology information, and then either adds a flow entry for flow processing or sends a message corresponding to the change (e.g., FLOW_MOD). ) can be sent down to the switches.

According to an embodiment of the present invention, when the controller rule information is updated, the packet may be processed without sending the packet to the controller according to the network topology information changed in the SDN switch.

5 is a diagram illustrating the connection of an SDN network system using host abstraction according to an embodiment of the present invention using a class pool method as an IP address system.

Referring to FIG. 5 , the configuration of an SDN network system in an embodiment of implementing an SDN network using a classpool method is shown.

According to an embodiment of the present invention, by implementing the SDN network using the classpool method, the upper SDN controller and the lower SDN controller can be connected very intuitively, and thus each subnetwork can be simply abstracted or integrated. .

According to an embodiment of the present invention, when the first lower-level SDN controller accesses its upper-level SDN controller, the lower-level SDN controller abstracts its domain to perform the role of an SDN switch, and provides an SDN switch to the upper SDN controller. can be connected as

According to an embodiment of the present invention, the upper SDN controller can perform host integration work by the class pool by identifying information on the lower SDN switch. By using an SDN controller with an abstraction module and a hierarchical connection function, the network can be configured in the same way as the SDN network configuration method using the conventional technology.

According to an embodiment of the present invention, packets belonging to the same subnetwork can operate independently of the upper SDN controller in the same manner as in the conventional SDN network implementation method, and when communicating with a host belonging to another subnetwork, packets belonging to the upper SDN controller You can use the query method in the form of data.

According to the above embodiment, if the information on the upper SDN controller is not accurate, the upper SDN controller may directly query the higher SDN controller.

According to an embodiment of the present invention, information corresponding to the query from the SDN controller queried through the above method can be converted into a flow rule and received, and the received SDN controller is converted to suit the network topology and then the communication is performed. can

6 is a diagram illustrating the connection of an SDN network system using host abstraction according to an embodiment of the present invention using a CIDR scheme as an IP address system.

Referring to FIG. 6 , the configuration of an SDN network system in an embodiment of implementing an SDN network using a CIDR scheme is shown.

According to an embodiment of the present invention, hosts can be integrated, but network addresses are integrated when super-netting is possible, but when super-netting is not possible, the network addresses are abstracted or integrated as compared to the class-pool method toward higher layers. This can get complicated.

According to an embodiment of the present invention, when a lower-level SDN controller first accesses an upper-level SDN controller, its domain may be abstracted to perform the role of an SDN switch, and may be connected to the upper-level SDN controller as an SDN switch.

According to an embodiment of the present invention, the upper-level SDN controller may recognize information on the lower-level switch and transmit the network address to the upper-level controller in the form of a list.

According to the above embodiment, the higher-level SDN controller can perform host integration, and after that, if there is a higher-level SDN controller in the maritime SDN controller, the conventional technology is implemented using an SDN controller with an abstraction module and a hierarchical connection function. The network can be configured in the same way as the SDN network configuration method used.

According to an embodiment of the present invention, packets belonging to the same subnetwork can operate independently of the upper SDN controller as in the existing SDN method. It can be processed by querying .

According to the above embodiment, if the information on the upper SDN controller is not accurate, the upper SDN controller may directly query the higher SDN controller.

According to an embodiment of the present invention, information corresponding to the query from the SDN controller queried through the above method can be converted into a flow rule and received, and the received SDN controller is converted to suit the network topology and then the communication is performed. can

7 is a flowchart of a method for implementing an SDN network using host abstraction according to an embodiment of the present invention.

The network topology information is obtained by analyzing the controller rule information ( 710 ).

According to an embodiment of the present invention, the controller rule information may be received or preset.

According to an embodiment of the present invention, the controller rule information may be preset, received from a network manager, or received from a higher-level SDN controller.

According to an embodiment of the present invention, the network topology information may mean information on the network type and components to be formed by the SDN controller according to the controller rule information.

A host and an SDN switch are created according to the network topology information (720).

According to an embodiment of the present invention, at least one SDN switch constituting a sub-network and at least one host connected to the SDN switch may be created as a virtual machine to construct a sub-network according to the acquired network topology information.

According to an embodiment of the present invention, a virtual machine may be created through the aforementioned abstraction method.

According to the above embodiment, at least one SDN switch and at least one host connected to the SDN switch are created as virtual machines through abstraction, each host and the SDN switch are connected in an N:1 correspondence, and connected to at least one host The SDN switch can be connected to the SDN controller in an N:1 correspondence.

Transmission data is received from the user ( 730 ).

According to an embodiment of the present invention, at least one host defined as a virtual machine using the representative network address may transmit transmission data received from the user to the SDN switch.

Here, the host may mean a terminal capable of performing a centralized function to execute a program or data file and transmit it to another host in a computer network and long-distance communication.

In general, physical computing devices such as a computer, a server, and a mobile communication terminal may be used as the host, but according to an embodiment of the present invention, computing resources are obtained from a computing device such as a user terminal connected to the host or a centrally connected server, A host can be abstracted and created as a virtual machine.

Here, the abstraction is an abstraction layer including at least one virtual machine that integrates the computational resources of all types of devices into one single resource so as not to be bound by the type and supplier of the physical device, and uses the integrated computational resource to perform a purpose. may mean to build

According to an embodiment of the present invention, in order to abstract a host, a method of abstracting one or as many hosts as necessary using a representative network address may be used.

According to the above embodiment, as the representative network address, an address concept such as a classful address system, a Classless Inter-domain Routing (CIDR) address system, and a Locator Identifier Separate Protocol (LISP) may be used, but is not limited thereto.

It is determined whether a host to communicate with is connected to the same SDN controller ( 740 ).

According to an embodiment of the present invention, it is possible to determine whether the SDN controller connected to the host to which the received packet data is received is connected to the same upper SDN controller or not to the same upper SDN controller.

According to an embodiment of the present invention, in order to transmit transmission data received from a host to a corresponding host, when the corresponding host exists in the same subnetwork, that is, when the corresponding host is connected to the same SDN controller, it is transmitted directly to the corresponding host. , When the corresponding host does not exist in the same subnetwork, that is, if the corresponding host is not connected to the same SDN controller, data that is a packet including transmission data can be transmitted to the SDN controller.

The lower SDN controller is connected to the upper SDN controller as an SDN switch (750).

According to an embodiment of the present invention, the SDN controller may be connected to an SDN switch, and the SDN controller may also be connected to a higher-level SDN controller.

Here, the SDN switch may refer to a device that software-controls and operates a network according to policies such as segmented traffic forwarding and packet processing received from the SDN controller.

According to the above embodiment, when the SDN controller is connected to the upper SDN controller, it may serve as an SDN switch of the upper SDDN controller.

Data that is a packet including transmission data is generated ( 760 ).

According to an embodiment of the present invention, when the SDN controller connected to the host host of the received packet data is not connected to the same upper SDN controller, packet-in data including transmission data can be generated. there is.

Here, the packet-in data may refer to data including transmission data received from a host and identification information on a transmission target of the transmission data.

According to an embodiment of the present invention, data that is an open flow-based packet may be used, but the present invention is not limited thereto.

The generated packet data is transmitted to the upper SDN controller (770).

According to an embodiment of the present invention, data, which is a packet, may be transmitted to the upper SDN controller in the form of a query.

Transmission data obtained from packet-in data is transmitted to the corresponding SDN switch (780).

According to the above embodiment, when the SDN controller receives a packet message, the SDN controller converts the SDN switch and at least one host connected to the SDN switch to a virtual machine according to the received or network topology information generated by interpreting preset controller rule information. After implementing the network by creating it, the flow message can be forwarded to the subordinate SDN controller or SDN switch.

At this time, since this flow message does not have information on the specific sub-topology, the lower-level SDN controller converts it to include the lower-level topology information and then either adds a flow entry for flow processing or sends a message corresponding to the change (e.g., FLOW_MOD). ) can be sent down to the switches.

According to an embodiment of the present invention, when the controller rule information is updated, the packet may be processed without sending a packet to the controller according to the changed network topology information in the SDN switch.

The transmission data is transmitted to the corresponding host (790).

According to an embodiment of the present invention, the received transmission data may be transmitted to a corresponding host.

The embodiments of the present invention are not implemented only through the devices and/or methods described above, and although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and the scope of the present invention is not limited thereto. Various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in are also included in the scope of the present invention.

100: host unit 200: SDN switch unit
300: SDN controller unit 310: flow analysis unit
320: virtual machine creation unit 330: packet-in data transmission unit
1000: SDN network system

Claims (12)

a host unit including at least one host defined as a virtual machine using a representative network address and transmitting transmission data;
SDN including at least one SDN switch defined as a virtual machine that directly transmits the data received from the host to the host, which is the receiving target, or transmits data, which is a packet including data, to the SDN controller. switch unit; and
A subnetwork is constructed by creating at least one SDN switch and at least one host as a virtual machine so that a network topology is implemented according to the controller rule information, and the received packet data is transmitted one layer above the corresponding SDN controller or the corresponding SDN controller. An SDN network system using host abstraction, comprising an SDN controller unit including at least one SDN controller that transmits to a higher-level SDN controller of The method of claim 1, wherein the host unit,
SDN network system using host abstraction, characterized in that the representative network address system is one of the address concepts such as the classful address system, the Classless Inter-domain Routing (CIDR) address system, and the LISP (Locator Identifier Separate Protocol). The method of claim 1, wherein the SDN switch unit,
In order to transmit the data received from the host to the corresponding host, if the corresponding host exists in the same subnetwork, it is directly transmitted to the corresponding host, and if the corresponding host is not in the same subnetwork, the transmitted data is transmitted to the SDN controller An SDN network system using host abstraction, characterized in that it transmits data, which is a packet containing data. According to claim 1, wherein the SDN controller unit,
The SDN network system using host abstraction, characterized in that when the SDN controller is connected to the upper SDN controller, it serves as an SDN switch of the upper SDN controller. According to claim 1, wherein the SDN controller unit,
a flow analysis unit for receiving or interpreting preset controller rule information to obtain network topology information;
a virtual machine generator for generating at least one SDN switch constituting the sub-network and at least one host connected to the SDN switch as a virtual machine in order to construct a sub-network according to the acquired network topology information;
If the SDN controller connected to the host receiving the received packet data is connected to the same upper SDN controller, it sends packet-in data to the SDN controller. The SDN network system using host abstraction, characterized in that it further comprises a packet-in data transmitter for transmitting packet-in data. The method of claim 5, wherein the SDN controller unit,
The SDN network system using host abstraction, characterized in that the transmission of data, which is a packet, to the upper SDN controller is in the form of a query. at least one host defined as a virtual machine using the representative network address to transmit transmission data;
transmitting the transmission data received from the host directly to the corresponding host in order to transmit the transmission data received from the host to the corresponding host, or transmitting data, which is a packet including the transmission data, to an SDN controller; and
A subnetwork is constructed by creating at least one SDN switch and at least one host as a virtual machine so that a network topology is implemented according to the controller rule information, and the received packet data is transmitted one layer above the corresponding SDN controller or the corresponding SDN controller. SDN network implementation method using host abstraction, comprising the step of transmitting to the upper SDN controller of The method of claim 7, wherein transmitting the transmission data comprises:
SDN network implementation method using host abstraction, characterized in that the representative network address system is one of the address concepts such as the classful address system, the Classless Inter-domain Routing (CIDR) address system, and the LISP (Locator Identifier Separate Protocol). 8. The method of claim 7, wherein transmitting the packet data comprises:
In order to transmit the data received from the host to the corresponding host, if the corresponding host exists in the same subnetwork, it is directly transmitted to the corresponding host, and if the corresponding host is not in the same subnetwork, the transmitted data is transmitted to the SDN controller A method for implementing an SDN network using host abstraction, characterized in that it transmits data, which is a packet including data. The method of claim 7, wherein the transmitting to the SDN controller comprises:
The SDN network implementation method using host abstraction, characterized in that the SDN controller serves as an SDN switch of the upper SDN controller when connected to the upper SDN controller. The method of claim 7, wherein the transmitting to the SDN controller comprises:
receiving or interpreting preset controller rule information to obtain network topology information;
creating, as a virtual machine, at least one SDN switch constituting the sub-network and at least one host connected to the SDN switch to construct a sub-network according to the acquired network topology information;
If the SDN controller connected to the host receiving the received packet data is connected to the same upper SDN controller, it sends packet-in data to the SDN controller. SDN network implementation method using host abstraction, characterized in that it further comprises the step of transmitting data that is a packet. The method of claim 11, wherein the transmitting to the SDN controller comprises:
The method for implementing an SDN network using host abstraction, characterized in that the transmission of data, which is a packet, to the upper SDN controller is in a query format.

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