WO2012090996A1 - 情報システム、制御装置、仮想ネットワークの提供方法およびプログラム - Google Patents
情報システム、制御装置、仮想ネットワークの提供方法およびプログラム Download PDFInfo
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- WO2012090996A1 WO2012090996A1 PCT/JP2011/080181 JP2011080181W WO2012090996A1 WO 2012090996 A1 WO2012090996 A1 WO 2012090996A1 JP 2011080181 W JP2011080181 W JP 2011080181W WO 2012090996 A1 WO2012090996 A1 WO 2012090996A1
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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
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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
- H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
- H04L12/462—LAN interconnection over a bridge based backbone
- H04L12/4625—Single bridge functionality, e.g. connection of two networks over a single bridge
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
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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
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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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
- H04L45/38—Flow based routing
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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
- H04L45/64—Routing or path finding of packets in data switching networks using an overlay routing layer
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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
Definitions
- the present invention is based on the priority claim of Japanese patent application: Japanese Patent Application No. 2010-292014 (filed on Dec. 28, 2010), the entire contents of which are incorporated herein by reference. Shall.
- the present invention relates to an information system, a control device, a method for providing a virtual network, and a program, and in particular, an information system, a control device, and a virtual network configured using a forwarding node that processes a received packet according to a processing rule that matches the received packet.
- the present invention relates to a providing method and program.
- Non-Patent Documents 1 and 2 OpenFlow captures communication as an end-to-end flow and performs path control, failure recovery, load balancing, and optimization on a per-flow basis.
- the OpenFlow switch specified in Non-Patent Document 2 includes a secure channel for communication with an OpenFlow controller that is positioned as a control device, and operates according to a flow table that is appropriately added or rewritten from the OpenFlow controller.
- a set of a matching rule (header field) to be matched with the packet header, flow statistical information (Counters), and an action (Actions) defining the processing content is defined (FIG. 17). reference).
- an OpenFlow switch when it receives a packet, it searches the flow table for an entry having a matching rule (see the header field in FIG. 17) that matches the header information of the received packet. When an entry that matches the received packet is found as a result of the search, the OpenFlow switch updates the flow statistical information (counter) and processes the process (specified) in the action field of the entry for the received packet. Perform packet transmission, flooding, discard, etc. from the port. On the other hand, if no entry matching the received packet is found as a result of the search, the OpenFlow switch forwards the received packet to the OpenFlow controller via the secure channel, and the source / destination of the received packet. To request the determination of the route of the packet based on the above, receive the flow entry that realizes this, and update the flow table. As described above, the OpenFlow switch performs packet transfer using an entry stored in the flow table as a processing rule.
- Example 2 on page 5 of Non-Patent Document 1 describes that a virtual network such as a VLAN (Virtual Local Network) can be provided by using the above-described OpenFlow mechanism.
- a virtual network such as a VLAN (Virtual Local Network) can be provided by using the above-described OpenFlow mechanism.
- individual user traffic is specified by the port or MAC (Media Access Control) address of the OpenFlow switch, and an appropriate VLAN ID is assigned to the OpenFlow switch. It is described that the user authentication is performed, and further, the location of the user is taken into consideration in the assignment of the VLAN ID.
- MAC Media Access Control
- the non-patent document 1 only discloses a method for assigning the VLAN ID (that is, determination of a virtual network) and the like, and the OpenFlow switch is used as a virtual node or a virtual front end system on the virtual network. There is no mention of getting it up and running for the user.
- the present invention has been made in view of the circumstances described above, and the object of the present invention is to provide physical nodes and virtual nodes in an information system in which a control device represented by the above-described OpenFlow controls a plurality of physical nodes. It is an object of the present invention to provide a configuration and method capable of dynamically and simply associating with each other.
- a packet received from an external node is processed according to a processing rule that associates a matching rule for specifying a flow with a processing content applied to a packet that conforms to the matching rule.
- a plurality of physical nodes, and a control device that operates the plurality of physical nodes as virtual nodes on a virtual network that can be used from the external node by setting the processing rule in the physical nodes.
- the control device includes: a first storage unit that defines a correspondence relationship between the physical node and a virtual network; and a second storage unit that defines a correspondence relationship between the external node and a virtual node on the virtual network.
- the external node based on information on a physical node to which the external node is connected and information on the external node included in a received packet. Determining the virtual network and virtual nodes connected, the information system according to claim is provided.
- a packet received from an external node is processed according to a processing rule that associates a matching rule for specifying a flow with a processing content applied to a packet that conforms to the matching rule.
- a second storage unit that is connected to a plurality of physical nodes and that defines a correspondence relationship between the physical node and a virtual network, a second storage unit that defines a correspondence relationship between the external node and a virtual node on the virtual network. And determining a virtual network and a virtual node to which the external node is connected based on the information on the physical node to which the external node is connected and the information on the external node.
- a packet received from an external node is processed according to a processing rule that associates a matching rule for specifying a flow with a processing content applied to a packet that conforms to the matching rule.
- the control device connected to the plurality of physical nodes determines the correspondence between the first storage unit that defines the correspondence between the physical node and the virtual network, the external node, and the virtual node on the virtual network. And determining a virtual network and a virtual node to which the external node is connected based on a physical node to which the external node is connected and information on the external node included in the received packet. And setting the processing rule on a plurality of physical nodes including a physical node corresponding to the virtual node.
- the method of providing a virtual network including a step of operating as a virtual node on available virtual network from the external node is provided. This method is linked to a specific machine called a control device that sets the processing rule in the physical node.
- a packet received from an external node is processed according to a processing rule that associates a matching rule for specifying a flow with a processing content applied to a packet that conforms to the matching rule.
- a plurality of physical nodes connected to each other, a first storage unit that defines a correspondence relationship between the physical node and the virtual network, a first storage unit that defines a correspondence relationship between the external node and a virtual node on the virtual network.
- a virtual network connected to the external node based on the physical node connected to the external node and the information on the external node included in the received packet.
- the program for executing the process to operate as a virtual node on the virtual networks available from the external node is provided.
- This program can be recorded on a computer-readable storage medium. That is, the present invention can be embodied as a computer program product.
- a virtual node that is handled as being connected to an external node is determined, and a service by a virtual network starting from the virtual node is provided. It becomes possible to provide.
- the present invention in one embodiment, in accordance with a processing rule that associates a matching rule for specifying a flow with a processing content applied to a packet that conforms to the matching rule, A plurality of physical nodes that process packets received from 30A to 30D and the processing rules are set in the physical nodes, so that the plurality of physical nodes can be used on virtual networks that can be used from the external nodes 30A to 30D.
- This can be realized by a configuration including a control server (control device) 20 that operates as a node.
- control server 20 includes a first storage unit that defines the correspondence between the physical node and the virtual network, and a second storage that defines the correspondence between the external node and the virtual node on the virtual network. And a virtual network and a virtual network to which the external node is connected based on information on the physical node to which the external node is connected (for example, the physical node 10A in FIG. 1) and information on the external node. Determine the node.
- the virtual network and the virtual node to which the external node is connected are uniquely obtained from the physical node information and the external node information without having to associate the physical node and the virtual node on a one-to-one basis. Is possible. Further, by adopting the same configuration, for example, even if the external node moves like the external node 30A in FIG. 1, the determined virtual node can be associated with the physical node of the movement destination (reference numeral 510 in FIG. 1). 520). The communication can be continued by performing mutual conversion between the flow on the virtual network and the flow on the physical network based on the updated correspondence.
- FIG. 2 is a diagram showing the overall configuration of the first embodiment of the present invention.
- physical nodes 10A to 10C a control server (control device) 20 that sets processing rules for these physical nodes 10A to 10C, and an external device that communicates with other external nodes via the physical nodes 10A to 10C.
- Nodes 30A-30D are shown.
- the control server 20 sets the physical nodes 10A to 10C as processing rules, thereby controlling the packet transfer path and causing the physical nodes 10A to 10C to behave as virtual nodes on the virtual network recognized by the user. be able to.
- the physical node 10C is assigned to the external nodes 30C and 30D by distributing the access from the external nodes 30A and 30B to the external nodes 30C and 30D by a predetermined algorithm.
- 10C can be operated as a virtual load balancer.
- FIG. 3 shows the detailed configuration of the physical nodes 10A to 10C (hereinafter referred to as “physical node 10” and “external node 30”, respectively, when there is no need to distinguish between the physical node and the external node). It is a block diagram.
- a packet processing unit 101 that processes received packets, a processing rule storage unit 102 that holds processing rules set by the control server 20, and a control server communication unit 103 that communicates with the control server 20.
- the configuration provided is shown.
- FIG. 4 is a diagram for explaining the processing rule 102A held in the processing rule storage unit 102.
- the processing rule has a configuration in which a matching rule for specifying a flow is associated with a processing content (action) applied to a packet that matches the matching rule.
- the physical node 10 performs aging of each processing rule.
- the packet processing unit 101 When receiving the packet, the packet processing unit 101 searches the processing rule storage unit 102 for a processing rule having a matching rule that matches the received packet. When the processing rule corresponding to the processing rule storage unit 102 exists, the packet processing unit 101 executes the processing content (for example, output from the port # 1) defined in the processing rule.
- the processing content for example, output from the port # 1
- the packet processing unit 101 If there is no processing rule corresponding to the processing rule storage unit 102 as a result of the search for the processing rule, the packet processing unit 101 requests the server communication unit 103 to make a processing rule setting request to the control server 20.
- the packet processing unit 101 deletes, from the processing rule storage unit 102, a processing rule that has not received a received packet within the time (timeout value) set for the aging. Further, the packet processing unit 101 notifies the control server 20 through the server communication unit 103 that the processing rule from the processing rule storage unit 102 has been deleted.
- the server communication unit 103 communicates with the control server 20 such as processing rule setting requests, reception of processing rules, and deletion of processing rules.
- the processing rule setting request is sent to the control server 20 a processing rule setting request message including information necessary for creating the processing rule extracted from the received packet itself or the received packet and information for uniquely specifying the physical node 10. Done by sending.
- the server communication unit 103 receives the processing rule from the control server 20, the server communication unit 103 stores the processing rule in the processing rule storage unit 102 via the packet processing unit 101.
- Such a physical node 10 can be configured using an OpenFlow switch described in Non-Patent Document 2 that performs the same operation as described above.
- FIG. 5 is a diagram illustrating a detailed configuration of the control server 20 according to the first embodiment of this invention.
- a physical node control unit 201 that controls the physical node 10
- the path control unit 202 performs, a virtual network control unit 203 that controls a virtual network constructed on the control server 20, and a storage unit that stores information referred to by these control units.
- the physical node information storage unit 204 of the control server 20 is means for storing the information of the physical node 10 received from the physical node 10.
- Such physical node information includes a physical node ID that uniquely identifies the physical node 10, a physical port ID that uniquely identifies the physical port (interface) of the physical node 10, the setting and status of the physical port, and the physical node 10.
- the connection state with the control server 20 is mentioned.
- the transfer path information storage unit 205 of the control server 20 is on the physical network indicating the correspondence between the transfer path between any two physical nodes 10 and the processing rule instructed to the physical node 10 on the transfer path.
- the flow (physical flow) is stored.
- the physical topology information storage unit 206 of the control server 20 stores a connection link state (network topology) between the physical nodes 10.
- the virtual network path information storage unit 207 of the control server 20 includes a flow on the physical network (physical flow) managed by the transfer path information storage unit 205 and flows of two arbitrary virtual nodes on the virtual network. The correspondence with (virtual flow) is stored.
- the physical virtual conversion information storage unit 208 of the control server 20 stores the correspondence between the physical network location information and the virtual network location information.
- the physical network position information and the virtual network position information can be paraphrased as a correspondence relationship between the physical nodes and the virtual nodes on the virtual network, and details thereof will be described later with reference to FIG.
- the virtual network configuration information storage unit 209 of the control server 20 includes a virtual node identified from the virtual network ID and virtual node ID constructed on the control server 20 as shown in FIG.
- the virtual network configuration information 209A indicating the correspondence relationship is stored.
- FIG. 7 is a diagram for explaining information held in the physical / virtual conversion information storage unit.
- a physical position virtual position conversion information storage unit (third storage unit) 2081 a physical position virtual network conversion information storage unit (first storage unit) 2083, and an external node virtual position conversion information storage unit A configuration including (second storage unit) 2082 is shown.
- the physical position / virtual position conversion information storage unit 2081 is an entry in which a virtual network ID, a virtual node ID, and a virtual interface ID are associated with a combination of a physical node ID, its physical port ID, and VLAN-TAG as shown in FIG. (Physical position / virtual position conversion information 2081A) is held.
- a combination of a physical node ID, a physical port ID, and a VLAN-TAG (however, VLAN-TAG is not an indispensable item) will be referred to as “physical network location information”, and a virtual network ID, virtual node ID, and virtual interface ID will be “ Virtual network location information ”.
- the external node virtual location conversion information storage unit 2082 associates virtual network location information with information for specifying an external node such as a source MAC address, source IP address, or source network address as shown in FIG.
- the entry (external node virtual position conversion information 2082A) is held.
- the physical location / virtual network conversion information storage unit 2083 holds an entry (physical location / virtual network conversion information 2083A) in which physical network location information as shown in FIG. 10 is associated with a virtual network ID.
- the physical node control unit 201 creates a processing rule to be set in the physical node 10 on the transfer path by referring to information held in the physical node information storage unit 204 according to an instruction from the path control unit 202.
- a function to be set in each physical node 10 and a function to receive a processing rule setting request and a processing rule deletion notification received from the physical node 10 and to notify the path control unit 202 and the virtual network control unit 203 are provided.
- the path control unit 202 has a function of obtaining a path between any two physical nodes 10 by referring to the connection link state (network topology) between the physical nodes 10 held in the physical topology information storage unit 206. . Further, the path control unit 202 causes the physical node control unit 201 to set a processing rule for realizing the path in the physical node 10 based on an instruction from the virtual network control unit 203, so that any two physical nodes It has a function of constructing a flow for communication between 10 physical ports. Further, when receiving a processing rule deletion notification from the physical node 10, the path control unit 202 has a function of notifying the virtual network control unit 203 of deletion of the corresponding processing rule.
- the virtual network control unit 203 has a function of identifying virtual network position information corresponding to position information on the physical network of the physical node 10 and realizing transmission and reception of packets between the physical network and the virtual network. Further, the virtual network control unit 203 has a function of performing communication emulation on the virtual network and obtaining an End-To-End communication flow between any two virtual nodes of the virtual network. Also, the virtual network control unit 203 converts the communication flow on the virtual network into an End-To-End communication flow of two arbitrary physical nodes 10 in the physical network, and sends a path on the physical network to the path control unit 202. And a function for instructing setting of a processing rule for realizing this.
- FIG. 11 is an example of a virtual network managed by the virtual network control unit 203 as described above.
- the virtual network includes virtual nodes such as a virtual router V1, a virtual firewall V2, a virtual load balancer V3, a virtual bridge V4, virtual servers V5, and V6, virtual interfaces belonging to these virtual nodes, and virtual interfaces. It is composed of virtual links that connect
- the control server 20 as described above can also be realized by a computer program that causes a computer constituting the control server 20 to refer to the above-described information and uses the hardware to execute each of the above-described processes.
- FIG. 12 is a sequence diagram showing the operation of the physical node that has received the packet transmitted from the external node 30.
- an external node for example, 30A in FIG. 2 transmits a packet addressed to another external node (for example, 30D in FIG. 2) (step S1-1)
- the physical node 10 converts the received packet into a received packet.
- a processing rule having a matching collation rule is searched (step S1-2).
- the processing rule storage unit 102 stores the process that matches the received packet.
- the physical node 10 adds the physical node ID of the own device and the physical port ID of the physical port that received the packet to the received packet (step S1-3), and sets the processing rule in the control server 20. It is transmitted as a request (step S1-4).
- FIGS. 13 and 14 are sequence diagrams showing the operation of the control server 20 that has received the processing rule setting request. First, an operation when virtual network position information corresponding to the position information of a physical node that has requested processing rule setting is registered in the physical position / virtual position conversion information storage unit 2081 will be described with reference to FIG.
- the physical node control unit 201 of the control server 20 outputs a processing rule setting request received from the physical node 10 to the virtual network control unit 203 (step S1-5).
- the virtual network control unit 203 searches the virtual network location information corresponding to the physical network location information included in the processing rule setting request with reference to the physical location / virtual location conversion information storage unit 2081 (step S1-6).
- the virtual network control unit 203 receives the specified virtual network from the virtual network configuration information storage unit 209.
- a virtual node in the network location information is specified (step S1-7), and a packet is transmitted to the specified virtual node (physical node corresponding to the virtual node) (step S1-8).
- the virtual network control unit 203 emulates the communication on the virtual network, calculates the End-To-End communication flow between the virtual nodes, and converts the calculated communication flow on the virtual network to the communication flow on the physical network. Conversion processing is performed, and processing rule setting processing for realizing the converted communication flow is performed.
- step S1-6 if the virtual network location information corresponding to the location information of the physical node that has requested the processing rule setting is not registered in the physical location / virtual location conversion information storage unit 2081, the virtual network control unit 203 Then, referring to the physical location virtual network conversion information storage unit 2083, the virtual network ID corresponding to the physical network location information is searched (step S1-9).
- the virtual network control unit 203 when the corresponding virtual network ID is registered in the physical location virtual network conversion information storage unit 2083, the virtual network control unit 203 further refers to the external node virtual location conversion information storage unit 2082, The virtual network location information corresponding to the information specifying the external node of any one of the source MAC address, source IP address, and source network address included in the packet header of the received packet is searched (step S1-10).
- the virtual network control unit 203 stores the physical network location information and the external node virtual location in the physical location / virtual location conversion information storage unit 2081.
- An entry that associates the virtual network location information identified from the conversion information storage unit 2082 is added (step S1-11).
- the packet is directly sent to the specified virtual node by referring to the physical position / virtual position conversion information storage unit 2081 according to the sequence of FIG. It becomes possible to transmit.
- FIG. 15 is a sequence diagram showing a series of operations when a processing rule is deleted by aging in the physical node 10.
- the physical node 10 deletes the corresponding processing rule (step S1-12), The deletion is notified to the control server 20 (step S1-13).
- the physical node control unit 201 of the control server 20 Upon receipt of the notification, the physical node control unit 201 of the control server 20 transfers the processing rule deletion notification to the path control unit 202 (step S1-14).
- the path control unit 202 searches the transfer path information storage unit 205 for a flow (physical flow) corresponding to the deleted processing rule (step S1-15), and sends a flow deletion notification to the virtual network control unit 203 ( Step S1-16).
- the virtual network control unit 203 searches the virtual network path information storage unit 207 for a flow (virtual flow) corresponding to the notified flow (physical flow) (step S1-17).
- the virtual network control unit 203 acquires physical network location information corresponding to the searched flow (physical flow from which the processing rule has been deleted) via the route control unit 202 (step S1-18).
- the virtual network control unit 203 searches the virtual network path information storage unit 207 for another flow (virtual flow) including the acquired physical network location information (step S1-19).
- the virtual network control unit 203 searches the physical position / virtual position conversion information storage unit 2081 for a physical position / virtual position conversion information entry that associates the physical network position information with the virtual network position information (step S1-20). ).
- the virtual network control unit 203 deletes the searched physical position / virtual position conversion information entry immediately or after a predetermined time (step S1-21).
- the physical position / virtual position conversion information of the control server 20 is deleted accordingly.
- the external node 30 moves, the physical port of another physical node that receives a packet from the external node 30 is changed. Therefore, the external node 30 transmits a GARP (Gratuitive Address Resolution Protocol) packet to the other physical node (for example, the physical node 10B in FIG. 2).
- GARP Gramuitive Address Resolution Protocol
- the physical node 10 that has received the GARP packet transmits a processing rule setting request to the control server 20 in accordance with the sequence shown in FIG.
- FIG. 16 is a sequence diagram showing the operation of the control server that has received the processing rule setting request for the GARP packet transmitted from the moved external node.
- the physical node control unit 201 of the control server 20 outputs a processing rule setting request received from the physical node 10 to the virtual network control unit 203 (step S2-1).
- the virtual network control unit 203 searches the virtual network location information corresponding to the physical network location information included in the processing rule setting request with reference to the physical location / virtual location conversion information storage unit 2081 (step S2-2).
- the virtual network control unit 203 since the virtual network position information for the physical network position information is not registered in the physical position / virtual position conversion information storage unit 2081 due to the movement of the external node, the virtual network control unit 203 stores the physical position / virtual network conversion information storage.
- the virtual network ID corresponding to the physical network location information is searched with reference to the unit 2083 (step S2-3).
- the virtual network control unit 203 further refers to the external node virtual position conversion information storage unit 2082, and either the source MAC address, the source IP address, or the source network address included in the packet header of the received packet.
- the virtual network location information corresponding to the information specifying the node is searched (step S2-4).
- the virtual network control unit 203 stores the physical network location information and the external node virtual location in the physical location / virtual location conversion information storage unit 2081.
- An entry that associates the virtual network location information identified from the conversion information storage unit 2082 is added (step S2-5).
- the virtual network control unit 203 further moves the external node 30 when there is an entry in the physical location / virtual location conversion information storage unit 2081 that associates the physical network location information with the already specified virtual network location information. It is determined that the flow (virtual flow) related to the physical network location information is searched with reference to the virtual network path information storage unit 207 (step S2-6).
- the virtual network control unit 203 instructs the path control unit 202 to delete the flow (physical flow) associated with the flow (virtual flow) ( Step S2-7).
- the path control unit 202 refers to the transfer path information storage unit 205 and acquires a series of processing rules for realizing a flow (physical flow) (step S2-8).
- the route control unit 202 instructs the physical node control unit 201 to delete all corresponding processing rules (step S2-9).
- the physical node control unit 201 instructs the physical node 10 holding the processing rule that has received the deletion instruction to delete these processing rules (step S2-10). Thereafter, processing similar to that in steps S1-12 to S1-21 in FIG. 15 is performed.
- the present invention is not limited to the above-described embodiments, and further modifications, replacements, and adjustments are possible without departing from the basic technical idea of the present invention. Can be added.
- the number of physical nodes and virtual nodes shown in the above-described embodiment is merely an example for the purpose of briefly explaining the present invention, and it is needless to say that the present invention is not limited thereto.
- a third storage unit that stores the correspondence between the determined virtual network and virtual node and the physical node, When the processing rule setting request is received from the physical node, the third storage unit is referred to, and if the corresponding entry cannot be found, the first and second storage units are referred to and the external
- a virtual network and a virtual node to which the node is connected are determined, and the correspondence relationship between the determined virtual network and virtual node and the physical node is stored in the third storage unit.
- a virtual network is associated with each interface of the physical node in the first storage unit, The controller is Preferably, the physical node determines a virtual network according to an interface that has received a packet related to a processing rule setting request.
- Control server control device 30, 30A to 30D External node 101 Packet processing unit 102 Processing rule storage unit 103 Server communication unit 201 Physical node control unit 202 Path control unit 203 Virtual network control unit 204 Physical node information storage unit 205 Transfer path information storage unit 206 Physical topology information Storage unit 207 Virtual network path information storage unit 208 Physical virtual conversion information storage unit 209 Virtual network configuration information storage unit 2081 Physical position virtual position conversion information storage unit (third storage unit) 2082 External node virtual position conversion information storage unit (second storage unit) 2083 Physical location virtual network conversion information storage unit (first storage unit)
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Abstract
Description
本発明は、日本国特許出願:特願2010-292014号(2010年12月28日出願)の優先権主張に基づくものであり、同出願の全記載内容は引用をもって本書に組み込み記載されているものとする。
本発明は、情報システム、制御装置、仮想ネットワークの提供方法およびプログラムに関し、特に、受信パケットに適合する処理規則に従って、受信パケットを処理する転送ノードを用いて構成した情報システム、制御装置、仮想ネットワークの提供方法およびプログラムに関する。
以下の分析は、本発明によって与えられたものである。
続いて、本発明の第1の実施形態について図面を参照して詳細に説明する。図2は、本発明の第1の実施形態の全体構成を表わした図である。図2を参照すると、物理ノード10A~10Cと、これら物理ノード10A~10Cに処理規則を設定する制御サーバ(制御装置)20と、物理ノード10A~10Cを介して他の外部ノードと通信する外部ノード30A~30Dとが示されている。
最後に、本発明の好ましい形態を要約する。
[形態1]
前記第1の視点に記載の情報システムのとおり。
[形態2]
前記制御装置は、
前記物理ノードからの前記処理規則の設定要求の受信を契機に、
前記処理規則の設定要求を送信した物理ノードの情報と、前記処理規則の設定要求に含まれる前記外部ノードの情報とに基づいて、前記外部ノードが接続する仮想ネットワークと仮想ノードとを決定することが好ましい。
[形態3]
さらに、前記決定した仮想ネットワークおよび仮想ノードと、前記物理ノードとの対応関係を記憶する第3の記憶部を備え、
前記物理ノードから前記処理規則の設定要求を受信した際に、前記第3の記憶部を参照し、該当エントリを発見できない場合に、前記第1、第2の記憶部を参照して、前記外部ノードが接続する仮想ネットワークと仮想ノードとを決定し、前記第3の記憶部に前記決定した仮想ネットワークおよび仮想ノードと、前記物理ノードとの対応関係を記憶することが好ましい。
[形態4]
前記第1の記憶部には、前記物理ノードのインタフェース毎に、仮想ネットワークが対応付けられており、
前記制御装置は、
前記物理ノードが処理規則の設定要求に係るパケットを受信したインタフェースに応じて、仮想ネットワークを決定することが好ましい。
[形態5]
前記第2の記憶部には、前記外部ノード毎に、仮想ネットワーク上の仮想ノードとその仮想インタフェース情報が対応付けられており、
前記制御装置は、
前記外部ノードが、前記仮想ネットワーク上の仮想ノードに、前記仮想インタフェースを介して接続しているものとして取り扱うことが好ましい。
[形態6]
前記第2の視点に記載の制御装置のとおり。
[形態7]
前記第3の視点に記載の仮想ネットワークの提供方法のとおり。
[形態8]
前記第4の視点に記載のプログラムのとおり。
なお、仮想ネットワークの提供方法およびプログラムは、形態1の情報システムと同様に、それぞれの構成要素ないしステップについて、形態2~形態5と同様に展開することが可能である。
なお、上記の特許文献および非特許文献の各開示を、本書に引用をもって繰り込むものとする。本発明の全開示(請求の範囲を含む)の枠内において、さらにその基本的技術思想に基づいて、実施形態の変更・調整が可能である。また、本発明の請求の範囲の枠内において種々の開示要素(各請求項の各要素、各実施形態の各要素、各図面の各要素等を含む)の多様な組み合わせ、ないし選択が可能である。すなわち、本発明は、請求の範囲を含む全開示、技術的思想にしたがって当業者であればなし得るであろう各種変形、修正を含むことは勿論である。
20 制御サーバ(制御装置)
30、30A~30D 外部ノード
101 パケット処理部
102 処理規則記憶部
103 サーバ通信部
201 物理ノード制御部
202 経路制御部
203 仮想ネットワーク制御部
204 物理ノード情報記憶部
205 転送経路情報記憶部
206 物理トポロジ情報記憶部
207 仮想ネットワーク経路情報記憶部
208 物理仮想変換情報記憶部
209 仮想ネットワーク構成情報記憶部
2081 物理位置仮想位置変換情報記憶部(第3の記憶部)
2082 外部ノード仮想位置変換情報記憶部(第2の記憶部)
2083 物理位置仮想ネットワーク変換情報記憶部(第1の記憶部)
Claims (8)
- フローを特定するための照合規則と、前記照合規則に適合するパケットに適用する処理内容とを対応付けた処理規則に従って、外部ノードから受信したパケットを処理する複数の物理ノードと、
前記物理ノードに、前記処理規則を設定することにより、前記複数の物理ノードを、前記外部ノードから利用可能な仮想ネットワーク上の仮想ノードとして動作させる制御装置と、を含み、
前記制御装置は、
前記物理ノードと、仮想ネットワークとの対応関係を定めた第1の記憶部と、
前記外部ノードと、仮想ネットワーク上の仮想ノードとの対応関係を定めた第2の記憶部と、を備え、
前記外部ノードが接続する物理ノードの情報と、前記外部ノードの情報とに基づいて、前記外部ノードが接続する仮想ネットワークと仮想ノードとを決定すること、
を特徴とする情報システム。 - 前記制御装置は、
前記物理ノードからの前記処理規則の設定要求の受信を契機に、
前記処理規則の設定要求を送信した物理ノードの情報と、前記処理規則の設定要求に含まれる前記外部ノードの情報とに基づいて、前記外部ノードが接続する仮想ネットワークと仮想ノードとを決定する請求項1の情報システム。 - さらに、前記決定した仮想ネットワークおよび仮想ノードと、前記物理ノードとの対応関係を記憶する第3の記憶部を備え、
前記物理ノードから前記処理規則の設定要求を受信した際に、前記第3の記憶部を参照し、該当エントリを発見できない場合に、前記第1、第2の記憶部を参照して、前記外部ノードが接続する仮想ネットワークと仮想ノードとを決定し、前記第3の記憶部に前記決定した仮想ネットワークおよび仮想ノードと、前記物理ノードとの対応関係を記憶する請求項1または2の情報システム。 - 前記第1の記憶部には、前記物理ノードのインタフェース毎に、仮想ネットワークが対応付けられており、
前記制御装置は、
前記物理ノードが処理規則の設定要求に係るパケットを受信したインタフェースに応じて、仮想ネットワークを決定する請求項1から3いずれか一の情報システム。 - 前記第2の記憶部には、前記外部ノード毎に、仮想ネットワーク上の仮想ノードとその仮想インタフェース情報が対応付けられており、
前記制御装置は、
前記外部ノードが、前記仮想ネットワーク上の仮想ノードに、前記仮想インタフェースを介して接続しているものとして取り扱う請求項1から4いずれか一の情報システム。 - フローを特定するための照合規則と、前記照合規則に適合するパケットに適用する処理内容とを対応付けた処理規則に従って、外部ノードから受信したパケットを処理する複数の物理ノードと接続され、
前記物理ノードと、仮想ネットワークとの対応関係を定めた第1の記憶部と、
前記外部ノードと、仮想ネットワーク上の仮想ノードとの対応関係を定めた第2の記憶部と、を備え、
前記外部ノードが接続する物理ノードの情報と、前記外部ノードの情報とに基づいて、前記外部ノードが接続する仮想ネットワークと仮想ノードとを決定し、
前記仮想ノードに対応する物理ノードを含む複数の物理ノードに、処理規則を設定することにより、前記複数の物理ノードを、前記外部ノードから利用可能な仮想ネットワーク上の仮想ノードとして動作させる制御装置。 - フローを特定するための照合規則と、前記照合規則に適合するパケットに適用する処理内容とを対応付けた処理規則に従って、外部ノードから受信したパケットを処理する複数の物理ノードと接続され制御装置が、前記物理ノードと、仮想ネットワークとの対応関係を定めた第1の記憶部と、前記外部ノードと、仮想ネットワーク上の仮想ノードとの対応関係を定めた第2の記憶部と、を参照し、前記外部ノードが接続する物理ノードと前記外部ノードの情報とに基づいて、前記外部ノードが接続する仮想ネットワークと仮想ノードとを決定するステップと、
前記仮想ノードに対応する物理ノードを含む複数の物理ノードに、前記処理規則を設定することにより、前記複数の物理ノードを、前記外部ノードから利用可能な仮想ネットワーク上の仮想ノードとして動作させるステップとを含む仮想ネットワークの提供方法。 - フローを特定するための照合規則と、前記照合規則に適合するパケットに適用する処理内容とを対応付けた処理規則に従って、外部ノードから受信したパケットを処理する複数の物理ノードと、接続され、
前記物理ノードと、仮想ネットワークとの対応関係を定めた第1の記憶部と、
前記外部ノードと、仮想ネットワーク上の仮想ノードとの対応関係を定めた第2の記憶部と、を備える制御装置を構成するコンピュータに、
前記外部ノードが接続する物理ノードと前記外部ノードの情報とに基づいて、前記外部ノードが接続する仮想ネットワークと仮想ノードとを決定する処理と、
前記仮想ノードに対応する物理ノードを含む複数の物理ノードに、前記処理規則を設定することにより、前記複数の物理ノードを、前記外部ノードから利用可能な仮想ネットワーク上の仮想ノードとして動作させる処理とを実行させるプログラム。
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OPENFLOW SWITCH SPECIFICATION, 1 December 2010 (2010-12-01) |
See also references of EP2661026A4 |
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Also Published As
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JP5590263B2 (ja) | 2014-09-17 |
CN110086701A (zh) | 2019-08-02 |
KR20150092351A (ko) | 2015-08-12 |
KR101644766B1 (ko) | 2016-08-01 |
KR101581093B1 (ko) | 2015-12-30 |
JPWO2012090996A1 (ja) | 2014-06-05 |
US20180324274A1 (en) | 2018-11-08 |
US10044830B2 (en) | 2018-08-07 |
US20130282867A1 (en) | 2013-10-24 |
CN103283187B (zh) | 2019-05-10 |
EP2661026A1 (en) | 2013-11-06 |
JP5590262B2 (ja) | 2014-09-17 |
JP2014135776A (ja) | 2014-07-24 |
JP2014158289A (ja) | 2014-08-28 |
KR20130099221A (ko) | 2013-09-05 |
EP2661026A4 (en) | 2014-06-11 |
CN103283187A (zh) | 2013-09-04 |
JP5534037B2 (ja) | 2014-06-25 |
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