WO2015035616A1 - Procédé et dispositif permettant des communications multiréseaux - Google Patents

Procédé et dispositif permettant des communications multiréseaux Download PDF

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Publication number
WO2015035616A1
WO2015035616A1 PCT/CN2013/083488 CN2013083488W WO2015035616A1 WO 2015035616 A1 WO2015035616 A1 WO 2015035616A1 CN 2013083488 W CN2013083488 W CN 2013083488W WO 2015035616 A1 WO2015035616 A1 WO 2015035616A1
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WO
WIPO (PCT)
Prior art keywords
network
protocol
node
path
boundary node
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PCT/CN2013/083488
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English (en)
Chinese (zh)
Inventor
李刚
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201380001875.7A priority Critical patent/CN103688510B/zh
Priority to PCT/CN2013/083488 priority patent/WO2015035616A1/fr
Publication of WO2015035616A1 publication Critical patent/WO2015035616A1/fr

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Classifications

    • 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
    • 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
    • H04L45/04—Interdomain routing, e.g. hierarchical routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols

Definitions

  • the present invention relates to communication technologies, and in particular, to an inter-network communication method and apparatus. Background technique
  • Generalized Multi-Protocol Label (Generalized Multi-Protocol Label) is introduced to meet the bandwidth requirements generated by the growth of Internet Protocol (IP) services and the dynamic allocation of bandwidth required by IP traffic bursts and uncertainties.
  • IP Internet Protocol
  • GMPLS Software Defined Network
  • SDN Software Defined Network
  • the GMPLS protocol and the protocol used by the SDN network are deployed on the SDN controller of the SDN network, such as the OpenFlow protocol, and the border node in the SDN network reports the received routing message and signaling message of the GMPLS protocol to the SDN network.
  • the SDN controller processes the related GMPLS protocol messages by the SDN controller to implement interworking between the networks in the networking.
  • Embodiments of the present invention provide an inter-network communication method and apparatus, to reduce signaling overhead of a network controller in a process of cross-communication, thereby reducing performance requirements on a network controller, and saving cost.
  • an embodiment of the present invention provides an inter-network communication method, where the method includes: a first border node of a first network receives a first path establishment request message sent by a second network, where the first path establishment request message is sent Carrying routing information of the second network to the third network, where The first border node is connected to the second network, and the second border node is connected to the third network, where the first network is a network of a first protocol, and the second network and the third network are a network of the second protocol, where the first protocol and the second protocol are different protocols;
  • the first border node establishes an application message according to the first path, and constructs a second path establishment application message;
  • the first border node receives a path setup response message sent by the second border node.
  • the first border node after the first border node receives the first path establishment request message sent by the second network, the first border node establishes an application message according to the first path. Before the second path establishment application message is constructed, the method further includes:
  • the first border node receives a path calculation success response message sent by the network controller.
  • the first border node sends the second path establishment request message to the second border node, so that the second border node establishes the Before the business path between the third network, it also includes:
  • the first boundary node is configured according to the first path Establish an application message, and construct a second path establishment application message, including:
  • the first border node establishes an application message according to the first path, and constructs a second path establishment request message of the second protocol;
  • the first border node directly sends the second path establishment request message to the second border node.
  • the first border node is configured according to the first path Establish an application message, and construct a second path establishment application message, including:
  • the first border node establishes an application message according to the first path, and constructs a second path establishment request message of the first protocol;
  • the first border node sends the second path establishment request message to the second border node by using a network controller, where the network controller is a network controller of the first network.
  • the first network is a software definition Network
  • the first protocol is an OpenFlow protocol
  • the second network and the third network are general multi-protocol label switching GMPLS networks of different network segments, border gateway protocols of different network segments, BGP networks, or label distribution protocols LDP networks of different network segments.
  • an embodiment of the present invention provides an inter-network communication method, including:
  • a network controller of the first network receives a routing protocol message of the second network sent via the first border node of the first network;
  • the network controller queries the reflection group, and sends the routing protocol message to the second boundary node, where the reflection group includes at least the first boundary node and the second boundary node, and the first boundary node
  • the second network is connected, and the second border node is connected to the third network, where the first network is a network of a first protocol, and the second network is a network of a second protocol
  • the first protocol and the second protocol are different protocols.
  • the method before the network controller of the first network receives the routing protocol message sent by the first border node of the first network, the method further includes:
  • the network controller acquires reflection group information, where the reflection information includes:
  • boundary node group including at least two boundary sections in the first network Point
  • the group protocol is a protocol corresponding to a protocol header of the first protocol added to the second protocol
  • the network controller configures the reflection group according to the reflection group information.
  • the method further includes:
  • the method further includes:
  • the network controller queries the reflection group information to determine the group protocol
  • the network controller adds a protocol header of the first protocol to the routing protocol message to generate a routing protocol message of a group protocol;
  • the network controller sends a routing protocol message of the group protocol to other boundary nodes in the boundary node group except the first boundary node.
  • the first network is a software defined network
  • the first protocol is an OpenFlow protocol
  • the second network and the third network are general multi-protocol label switching GMPLS networks of different network segments, border gateway protocols of different network segments, BGP networks, or label distribution protocols LDP networks of different network segments.
  • an inter-network communication device including:
  • a receiving module configured to receive a first path establishment request message sent by the second network, where the first path establishment request message carries routing information of the second network to the third network, where the first boundary node and the first The second network is connected, and the second border node is connected to the third network, where the first network is a network of a first protocol, and the second network is a network of a second protocol, The first protocol and the second protocol are different protocols;
  • a processing module configured to create an application message according to the first path received by the receiving module, Constructing a second path establishment application message;
  • a sending module configured to send, to the second border node, the second path establishment request message that is configured by the processing module, so that the second border node establishes a service path with the third network;
  • the receiving module is further configured to receive a path setup response message sent by the second border node.
  • the processing module is further configured to determine, according to the first path establishment request message, the second border node;
  • the sending module is further configured to send a path calculation request message to the network controller, so that the network controller calculates and establishes a service path between the first border node and the second border node;
  • the receiving module is further configured to receive a path calculation success response message sent by the network controller.
  • the sending module configured to send the second path establishment request message to the second border node, to enable the second border node to
  • the network controller sends a path calculation request message, and the network controller calculates and establishes a service path between the first boundary node and the second boundary node.
  • the processing module is configured to be used according to the first a path establishment application message, and constructing a second path establishment application message of the second protocol;
  • the sending module is configured to send the second path establishment request message directly to the second border node.
  • the processing module in a fourth possible implementation manner of the third aspect, the processing module, a path establishment application message, and constructing a second path establishment application message of the first protocol;
  • the sending module is configured to send, by using a network controller, the second path establishment request message to the second border node, where the network controller is a network controller of the first network.
  • the first network is a software definition Network
  • the first protocol is an OpenFlow protocol
  • the second network and the third network are universal multi-protocol label switching of different network segments GMPLS network, border gateway protocol BGP network of different network segments or label distribution protocol LDP network of different network segments.
  • an inter-network communication device including:
  • a receiving module configured to receive a routing protocol message of the second network sent by the first border node of the first network
  • a processing module configured to query a reflection group, where the reflection group includes at least the first boundary node and the second boundary node, where the first boundary node is connected to the second network, and the second boundary node is Connected to the third network, where the first network is the network of the first protocol, the second network and the third network are the network of the second protocol, and the first protocol and the second protocol are Different agreements;
  • a sending module configured to send the routing protocol message to the second border node.
  • the processing module is configured to acquire the reflection group information, where the reflection information includes:
  • boundary node group including at least two boundary nodes in the first network
  • the group protocol is a protocol corresponding to a protocol header of the first protocol added to the second protocol
  • the reflection group is configured according to the reflection group information.
  • the processing module is configured to determine a reflection group to which the first boundary node belongs; And a sending module, configured to send, according to the identifier of the reflection group, the reflection group information to each boundary node included in a boundary node group of the reflection group corresponding to the identifier.
  • the processing module is configured to query the reflection group information to determine the group protocol, Adding a protocol header of the first protocol to generate a routing protocol message of a group protocol;
  • the sending module is configured to send a routing protocol message of the group protocol to other boundary nodes in the boundary node group except the first boundary node.
  • the first network is a software-defined network
  • the first protocol is an OpenFlow protocol
  • the second network and the third network are general multi-protocol label switching GMPLS networks of different network segments, border gateway protocols of different network segments, BGP networks, or label distribution protocols LDP networks of different network segments.
  • an embodiment of the present invention provides an inter-network communication device, including: a processor and a memory, where the memory stores an execution instruction, when the inter-network communication device is running, the processor and the memory Inter-communication, the processor executing the execution instruction to cause the inter-network communication device to perform the method of any of the first to fifth aspects of the first aspect, the first aspect.
  • an embodiment of the present invention provides an inter-network communication device, including: a processor and a memory, where the memory stores an execution instruction, when the inter-network communication device is running, the processor and the memory Inter-communication, the processor executing the execution instruction to cause the inter-network communication device to perform the method of any of the first to fourth aspects of the second aspect, the second aspect.
  • the method and device for inter-network communication establish a signaling path by transmitting a signaling protocol message to establish a service path for the second network to communicate with the third network, so that the service data can be based on the service path.
  • An end-to-end transmission process from the second network to the third network across the first network.
  • the second protocol is not required to be deployed on the network controller of the first network, which reduces the signaling overhead of the network controller during the cross-communication process, thereby reducing the performance requirements of the network controller and saving costs.
  • FIG. 1 is a schematic diagram of a first network architecture applicable to an inter-network communication method according to the present invention
  • Embodiment 1 of an inter-network communication method according to the present invention
  • 3 is a schematic diagram of a second network architecture applicable to the method for inter-network communication according to the present invention
  • 4 is a signaling diagram of Embodiment 2 of an inter-network communication method according to the present invention
  • FIG. 5 is a signaling diagram of Embodiment 3 of an inter-network communication method according to the present invention.
  • Embodiment 7 is a signaling diagram of Embodiment 5 of an inter-network communication method according to the present invention.
  • Embodiment 8 is a schematic structural diagram of Embodiment 1 of an inter-network communication apparatus according to the present invention.
  • Embodiment 9 is a schematic structural diagram of Embodiment 2 of an inter-network communication device according to the present invention.
  • Embodiment 3 of an inter-network communication device according to the present invention.
  • FIG. 11 is a schematic structural diagram of Embodiment 4 of an inter-network communication apparatus according to the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • FIG. 1 is a schematic diagram of a first network architecture applicable to an inter-network communication method according to the present invention.
  • the networking includes a first network, a second network, and a third network, where the first network has a boundary node.
  • the second network has nodes D, E
  • the third network has nodes G, F
  • the node refers to a functional device having processing, forwarding or other operations on data, signaling, etc., such as Routers, switches, etc.
  • the border node A of the first network is connected to the nodes D, E of the second network
  • the border node B of the first network is connected to the node G of the third network
  • the border node C of the first network is connected to the node F of the third network.
  • the internal nodes of each network are connected to each other as shown by the solid line in the figure.
  • the first network has at least one network controller connected to the boundary nodes A, B, C of the first network, as indicated by the dashed lines in the figure.
  • the first network is a network of a first protocol
  • the second network and the third network are networks of a second protocol
  • the first protocol and the second protocol are different protocols.
  • the first network is an OpenFlow-based network
  • the second network and the third network are GMPLS networks.
  • the present invention provides a method for a second network to communicate with a third network across a first network, or a method for a third network to communicate with a second network across a first network, a second network Compared with the third network, there is no strict distinction.
  • FIG. 2 is a flowchart of Embodiment 1 of an inter-network communication method according to the present invention. Referring to FIG.
  • the executor of the embodiment is a border node, and is applicable to a scenario in which a signaling protocol message is transmitted to establish a signaling when the second network communicates with the third network, where the second network crosses the first network.
  • the network protocol of the first protocol and the network protocol of the second protocol are simultaneously deployed on the node.
  • the embodiment includes the following steps:
  • the first border node of the first network receives the first path establishment request message sent by the second network, where the first path establishment application message carries the routing information of the second network to the third network, and the first border node is connected to the second network.
  • the second boundary node is connected to the third network, where the first network is the network of the first protocol, the second network and the third network are the network of the second protocol, and the first protocol and the second protocol are different protocols.
  • the node D of the second network is based on the global traffic engineering database, and the service path is D-A-B-G.
  • the source boundary node that is, the first boundary node is A
  • the destination boundary node that is, the second boundary node is B.
  • the node D of the second network sends a first path establishment request message to the first border node A, where the first path establishment request message carries routing information between the node D of the second network to the node G of the third network, such as a service path.
  • DABG related routing information, etc.
  • the routing information carried in the first path establishment request message of the resource reservation protocol (RTVP-TE) may be Display the path object (Explicit Route Object, ER0) information.
  • the first border node establishes an application message according to the first path, and constructs a second path establishment application message.
  • the first border node A After the first border node A receives the first path establishment request message, according to the routing information related to the service path DABG, such as the ER0 information of the RSVP-TE, the next hop is determined to be the second boundary node B, and the second path is established. Applying a message and preparing to send the second path establishment request message to the second border node B.
  • the routing information related to the service path DABG such as the ER0 information of the RSVP-TE
  • the first border node sends a second path establishment request message to the second border node, so that the second border node establishes a service path with the third network.
  • the first border node A After constructing the second path establishment request message, based on the service path between the first border node A and the second border node B, for example, a preset service path, or calculated by the network controller
  • the established service path the first border node A sends a second path establishment request message to the second border node B, so that the second border node determines that the next hop is the node G of the third network according to the routing information related to the service path DABG.
  • the second border node B interacts with the node G to establish a service path between the second border node B and the node G.
  • the first border node receives a path setup response message sent by the second border node.
  • the node G of the third network After the service path between the second border node B and the node G is established, the node G of the third network sends a path establishment response message to the second border node B, so that the second border node B sends the path to the first border node A.
  • the path setup response message ultimately causes the first border node A to send the path setup response message to the node D of the second network.
  • the path establishment response message is transmitted from the node G of the third network to the node D of the second network, it indicates that the end-to-end service path DABG is successfully established, so that the service data can be transmitted from the second network across the first network according to the service path.
  • the end-to-end routing process passed to the third network.
  • the method for inter-network communication establishes a signaling path by transmitting a signaling protocol message to establish a service path for the second network to communicate with the third network across the first network, and the service data can be obtained according to the service path.
  • the end-to-end transmission process in which the second network is transmitted to the third network across the first network.
  • the second protocol is not required to be deployed on the network controller of the first network, which reduces the signaling overhead of the network controller during the cross-communication process, thereby reducing the performance requirements of the network controller and saving costs.
  • the source boundary node may trigger the network controller to calculate and establish The service path between the first border node A and the second border node B, that is, the first border node A of the first network receives the first path establishment request message sent by the second network, and establishes an application message according to the first path, and constructs Before the second path establishment application message of the first protocol, the first boundary node establishes an application message according to the first path, and determines a second boundary node; the first boundary node sends a path calculation application message to the network controller, so that the network controller calculates And establishing a service path between the first border node and the second border node, where the path calculation request message carries the service attribute requirement, and the service attribute requirement is to meet the attribute requirement of the service carried in the path establishment request message sent by the second network.
  • the network controller needs to be at the first boundary node A and the second boundary.
  • a path with a bandwidth of 10M is established between the Node Bs; the first boundary node receives a path calculation success response message sent by the network controller.
  • the destination boundary node that is, the second border node B
  • the network controller may trigger the network controller to calculate and establish a service path between the first border node A and the second border node B, that is, the first border node A sends a second path to the second border node B after constructing the second path establishment request message according to the first path establishment request message.
  • the first border node A sends the second path establishment request message to the second border node B, so that the second border node B sends a path calculation application message to the network controller, so that the network controller calculates and establishes A service path between the first boundary node A and the second boundary node B.
  • the first boundary node A and the second boundary node B are preset or configured. If there is a direct path, the first border node A establishes an application message according to the first path, constructs a second path establishment application message of the second protocol, and directly sends a second path establishment application message to the second border node B; or A border node A may also send a second path establishment request message to the second border node B through the directly reachable path, but send a second path establishment request message to the second border node through the network controller.
  • the network controller needs to forward signaling, data, etc., at this time, the first border node A establishes an application message according to the first path, constructs a second path establishment application message of the first protocol, and sends a second path establishment application message to the second border node by using the network controller.
  • FIG. 3 is a schematic diagram of a second network architecture applicable to the method for inter-network communication according to the present invention.
  • the first network is specifically an SDN network
  • the second network is specifically a GMPLS network S
  • the third network is specifically a GMPLS network D
  • the first protocol is an OpenFlow protocol
  • the second protocol is a traffic.
  • the resources of Gonghe are given to the GMPLS protocol such as Resource Reservation Protocol (TRAV).
  • the SDN network has border nodes A, B, and C and the intermediate node H.
  • the GMPLS network S has nodes 0 and E
  • the GMPLS network has nodes G and F.
  • the border node A of the SDN network is connected to the nodes D and E of the GMPLS network S
  • the border node B of the SDN network is connected to the nodes G and F of the GMPLS network D
  • the internal nodes of each network are connected to each other, as shown by the solid line in the figure.
  • the SDN network has at least one SDN controller connected to the border nodes A, B, C of the SDN network, as indicated by the dashed lines in the figure.
  • NI Network Node Interface
  • INNI Internal Network
  • EN I External Network-Network Interface
  • the OpenFlow protocol and the GMPLS-related protocol are deployed on the border nodes, B and C.
  • the GMPLS-related protocol does not need to be deployed on the intermediate node H.
  • the SDN controller and the border nodes A, B, and C are configured with a reflection group:
  • the protocol used by the reflection group is the OpenFlow message type corresponding to the RSVP-TE protocol, that is, if the protocol packet received by the SDN controller is an OpenFlow message added.
  • the RSVP-TE protocol packet of the header can identify the RSVP-TE protocol packet; the identity of the reflection group is 1, and the members of the reflection group are boundary nodes, 8 and .
  • the information of the reflection group is sent to the boundary nodes A, B, and C, so that the reflection groups are configured on the boundary nodes A, B, and C.
  • FIG. 4 is a signaling diagram of Embodiment 2 of the method for inter-network communication according to the present invention.
  • the embodiment of the present invention includes the following steps:
  • the node D of the GMPLS network calculates the service path.
  • the D node calculates the service path of the Layered Service Provider (LSP) as D-A-B-G.
  • LSP Layered Service Provider
  • the first boundary node is the boundary node A and the second boundary node is the boundary node B.
  • the node D sends a first path establishment application message of the RSVP-TE protocol to the first border node A.
  • the node D of the GMPLS network S sends a first path establishment request message of the RSVP-TE protocol to the first border node A, where the first path establishment application message carries the information related to the DABG, such as RSVP-TE. ERO information.
  • the first border node A replies to the node D with a confirmation message.
  • the first border node A parses and processes the first path establishment request message, and returns an acknowledgement message to the node D of the second network.
  • the first border node A sends a path calculation request message to the SDN controller.
  • the first border node A establishes an application message based on the first path, and after learning that the next node is the border node B, sends a path calculation application message to the SDN controller, requesting SDN control.
  • the controller calculates and establishes a service path between the first boundary node A and the second boundary node B.
  • the path calculation request message carries path attribute information, such as a bandwidth condition that is satisfied by the path of the A-B, so that the SDN controller calculates the path that satisfies the condition according to the path attribute information.
  • path attribute information such as a bandwidth condition that is satisfied by the path of the A-B
  • the SDN controller calculates and establishes a path between the A-Bs.
  • the SDN controller calculates the path between the boundary node A and the boundary node B, and the calculated path needs to satisfy the relevant path attribute information, and then drives and installs the calculated path.
  • the final path is A-H-B.
  • the SDN controller sends a path calculation response message to the first border node A.
  • the SDN controller calculates and establishes a path that satisfies the path data information between the ABs, sends a path calculation response message indicating that the path establishment is successful to the first border node A; otherwise, sends an indication to the first border node A.
  • Path calculation failure message for path establishment failure (not shown in the figure).
  • the first border node A constructs a second path establishment request message.
  • the first border node A calculates an application message based on the first path, constructs a second path establishment request message, and prepares to send the message to the second border node B.
  • the second path establishes an application message.
  • the application message is established according to the first path, and the second path establishment application of the RSVP-TE protocol is established. And sending the second path establishment request message to the second border node B, or the first border node A may not send the second path establishment request message to the second border node B by using the directly reachable path.
  • the second path establishment request message is sent to the second border node by the network controller. .
  • the first border node if there is no directly reachable control path between the first border node A and the second border node B, and the SDN controller needs to be forwarded, the first border node establishes an application message for the first path.
  • the OpenFlow protocol message header is added to construct a second path establishment application message of the OpenFlow protocol, and the length of the message is the sum of the length of the first path establishment application message of the RSVP-TE protocol and the length of the OpenFlow protocol message header.
  • the first border node A sends a second path establishment request message to the SDN network controller.
  • the SDN controller reflects the second path establishment application message.
  • the SDN controller After receiving the second path establishment application message of the OpenFlow protocol, the SDN controller The information type and the message source, that is, the first boundary node A, the query reflection group, obtain the information of the boundary nodes other than the first boundary node A in the reflection group, and then the other boundaries in the boundary node group corresponding to the reflection group.
  • the node eg, the second border node B
  • the second border node B sends an acknowledgement message to the first border node A.
  • the second border node B strips the protocol message header and processes according to the RSVP-TE protocol. Specifically, this step includes the following sub-steps:
  • the second border node B sends an acknowledgement message to the SDN network controller.
  • the second border node B encapsulates the OpenFlow protocol message header with the RSVP-TE acknowledgement message and sends it to the SDN controller.
  • the SDN network controller sends an acknowledgement message to the first border node A.
  • the second border node B sends a path calculation request message to the node G.
  • the second border node B parses the second path establishment request message, determines that the next node is the node G of the third network, and sends a path establishment request message of the RSVP-TE protocol to the node G.
  • the node G sends a path setup response message to the second border node B.
  • the node G follows the conventional GMPLS.
  • the protocol processing of the RSVP-TE after calculating the path between the second boundary node B, sends a path establishment response message to the second boundary node B.
  • the second border node B sends a path setup response message to the first border node A.
  • this step after the second boundary node award path establishment response message encapsulates the OpenFlow protocol message header, it is sent to the first border node A through the SDN network controller. Specifically, this step includes the following substeps:
  • the second border node B sends a path setup response message to the SDN network controller.
  • the SDN network controller sends a path setup response message to the first border node A.
  • the first border node A sends a path setup response message to the node D.
  • the first border node A strips the OpenFlow protocol message header, constructs a path establishment response message of the RSVP-TE protocol, and sends it to the node D.
  • the path establishment response message is transmitted from the node G of the third network to the node D of the second network, it indicates that the end-to-end service path DABG is successfully established, so that the service data can be transmitted from the second network across the first network according to the service path.
  • the end-to-end routing process passed to the third network.
  • the first border node A is receiving the third network.
  • the path calculation application message is sent to the SDN controller to calculate and establish a path between the first boundary node A and the second boundary node B in the SDN network, and then construct a second path calculation. Applying a message and sending it to the second border node B, so that the second border node B sends a path establishment request message to the border node G of the third network to establish a relationship between the second border node B of the SDN network and the node G of the third network.
  • the path that is, steps 203 to 205 are performed first, and then steps 206 to 212 are performed.
  • the first border node A may first construct a second path calculation request message and send it to the second boundary node B, so that the second boundary node B Responding to the confirmation message and sending a path establishment request message to the node G of the third network to establish a path between the second border node B of the SDN network and the node G of the third network, and then sending a path calculation request message to the SDN controller, to Calculating and establishing a path between the first border node A and the second border node B in the SDN network, that is, performing steps 206-212 first, so that the first border node A receives the node G of the third network and passes through the second border node B.
  • steps 203-205 are performed to establish a path between the first boundary node A and the second boundary node B in the SDN network.
  • the present invention is described in detail by taking the source boundary node, that is, the first boundary node A, triggering the SDN controller to calculate the path between the first boundary node A and the second boundary node B as an example.
  • the present invention is not limited thereto. In other possible implementation manners, it may also be a destination boundary node, that is, the second boundary node B triggers the SDN controller to calculate between the first boundary node A and the second boundary node B. path of.
  • the source boundary node that is, the first boundary node A
  • the SDN controller to calculate the path between the first boundary node A and the second boundary node B. path of.
  • the present invention is described in detail by taking the source boundary node, that is, the first boundary node A, triggering the SDN controller to calculate the path between the first boundary node A and the second boundary node B as an example.
  • the present invention is not limited thereto. In other possible implementation manners, it may also be a destination boundary node, that is, the second boundary node B
  • FIG. 5 is a signaling diagram of Embodiment 3 of an inter-network communication method according to the present invention. Referring to FIG. 3 and FIG. 5 simultaneously, the embodiment of the present invention includes the following steps:
  • the node D of the GMPLS network calculates the service path.
  • Node D sends a first path establishment request message to the first border node A.
  • the first border node A replies to the node D with a confirmation message.
  • the above steps 300 to 302 can be specifically seen in steps 200 to 202 shown in FIG. 4, and details are not described herein again.
  • the first border node A sends a second path establishment request message to the second border node B. Specifically, this step includes the following sub-steps:
  • the first border node A sends a second path establishment request message to the SDN controller; the first border node A parses the first path calculation application message to determine that the next node is B, The first path calculation request message is added to the SDN network controller after adding the OpenFlow protocol message header to construct the second path establishment request message.
  • the SDN network controller sends a second path establishment request message to the second border node B.
  • the second border node B sends an acknowledgement message to the first border node A.
  • the second border node B After receiving the second path establishment request message sent by the SDN controller, the second border node B strips the OpenFlow protocol message header and processes it by using the RSVP-TE protocol. Specifically, this step includes the following steps:
  • the second border node B sends an acknowledgement message to the SDN controller.
  • the second border node B After processing the second path establishment request message, the second border node B generates an acknowledgement message, encapsulates the OpenFlow protocol message header for the acknowledgement message, and sends the message to the SDN controller.
  • the SDN controller sends an acknowledgement message to the first border node A.
  • the second border node B sends a path calculation request message to the SDN controller.
  • the second border node B establishes an application message based on the second path, and learns that the previous node is the boundary node A. If the path between the first boundary node A and the second boundary node B is not preset, the SDN is sent to the SDN. The controller sends a path calculation request message, and requests the SDN controller to calculate and establish a path between the first boundary node A and the second boundary node B.
  • the path calculation request message carries path attribute information, such as a bandwidth condition that is satisfied by the path of the A-B, so that the SDN controller calculates the path that satisfies the condition according to the path attribute information.
  • path attribute information such as a bandwidth condition that is satisfied by the path of the A-B
  • the SDN controller calculates and establishes a path between A-Bs.
  • step 204 in Figure 4 For details, refer to step 204 in Figure 4 above, and details are not described herein.
  • the SDN controller sends a path calculation response message to the second border node B.
  • the SDN controller calculates and establishes a path that satisfies the path data information between the ABs, sends a path calculation response message indicating that the path establishment is successful to the second border node B; otherwise, sends the path to the second border node B.
  • a path calculation failure message indicating that the path establishment failed (not shown in the figure).
  • the second border node B sends a path establishment request message to the node G.
  • the second border node B parses the second path establishment request message, determines that the next node is the node G of the third network, and sends a path establishment request message of the RSVP-TE protocol to the node G.
  • the node G sends a path setup response message to the second border node B.
  • the node G after receiving the path establishment response message, the node G follows the conventional GMPLS.
  • the protocol processing of the RSVP-TE after calculating the path between the second border node B, sends a path establishment response message to the second border node B.
  • the second border node B sends a path setup response message to the first border node A.
  • this step after the second boundary node award path establishment response message encapsulates the OpenFlow protocol message header, it is sent to the first border node A through the SDN network controller. Specifically, this step includes the following substeps:
  • the second border node B sends a path setup response message to the SDN network controller.
  • the SDN network controller sends a path setup response message to the first border node A.
  • the first border node A sends a path setup response message to the node D.
  • the first border node A strips the OpenFlow protocol message header, constructs a path establishment response message of the RSVP-TE protocol, and sends the message to the node G.
  • the path establishment response message is transmitted from the node G of the third network to the node D of the second network, it indicates that the end-to-end service path DABG is successfully established, so that the service data can be transmitted from the second network across the first network according to the service path.
  • the end-to-end routing process passed to the third network.
  • the second border node B first sends a path calculation application message to the SDN controller to calculate a path between the first boundary node A and the second boundary node B in the SDN network, and then The second border node B sends a path establishment request message to the node G of the second network to establish a path between the second border node B of the SDN network and the node G of the third network, that is, steps 305 to 307 are performed first, and then steps are performed. 308 ⁇ 309.
  • the present invention is not limited thereto.
  • the second border node B may first send a path establishment request message to the node G of the third network to establish a second boundary node B of the SDN network.
  • Steps 308-309 are performed first, so that the second border node B receives the path setup response message sent by the node G of the third network, and then performs steps 305-307 to establish the first boundary node A and the second boundary node in the SDN network.
  • the path between B is, after step 304, Steps 308-309 are performed first, so that the second border node B receives the path setup response message sent by the node G of the third network, and then performs steps 305-307 to establish the first boundary node A and the second boundary node in the SDN network.
  • FIG. 6 is a flowchart of Embodiment 4 of the inter-network communication according to the present invention.
  • the execution body of this embodiment is a network controller, which is applicable to a scenario in which a routing protocol message is transmitted when the second network communicates with the third network across the first network.
  • the embodiment includes the following steps:
  • the network controller of the first network receives the first sent by the first border node of the first network. Two network routing protocol messages.
  • the first border node of the first network receives a routing protocol message sent by a node of the second network connected thereto, for example, an open shortest path priority with traffic engineering carrying the traffic engineering data information (Open Shortest Path First Interior Gateway) Protocol-Traffic Engineering, OSPF-TE) Routing Protocol Messages.
  • a routing protocol message sent by a node of the second network connected thereto, for example, an open shortest path priority with traffic engineering carrying the traffic engineering data information (Open Shortest Path First Interior Gateway) Protocol-Traffic Engineering, OSPF-TE) Routing Protocol Messages.
  • OSPF-TE Open Shortest Path First Interior Gateway
  • the network controller queries the reflection group, and sends a routing protocol message to the second boundary node.
  • the reflection group includes at least a first boundary node and a second boundary node, where the first boundary node is connected to the second network, and the second boundary node is connected to The third network is connected, where the first network is the network of the first protocol, the second network and the third network are the network of the second protocol, and the first protocol and the second protocol are different protocols.
  • the reflection group can be pre-configured on the network controller.
  • the reflection group refers to each boundary group of the first network as a complete set. After some of the boundary nodes are divided into one group, the subset of the complete set is taken as a reflection group. .
  • the controller After receiving a routing protocol message or other message sent by a border node in a reflection group, the controller reflects the message to other boundary nodes in the reflection group.
  • the boundary node in the reflection group includes at least a first boundary node A connected to the second network and a second boundary node B connected to the second network.
  • the network controller After receiving the routing protocol message sent by the first border node A, the network controller queries other boundary nodes in the reflection group where the first border node A is located according to the first border node A, and then sends a routing protocol message to the reflection.
  • Other boundary nodes other than the first boundary node A such as the second boundary node B, thereby transmitting routing information of the second network to the third network, so that the third network can be according to the second network and the first network Routing information, etc., calculates the routing path of the service transmission.
  • the inter-network communication method provided by the embodiment of the present invention transmits the routing information of the first network to the third network via the first network by transmitting a routing protocol message, so that the routing information is transmitted from the second network to the third network across the first network. End-to-end transmission process.
  • the second protocol is not required to be deployed on the network controller of the first network, which reduces the signaling overhead of the network controller during the cross-communication process, thereby reducing the performance requirements of the network controller and saving costs.
  • the network controller needs to obtain the routing protocol message sent by the first border node of the first network.
  • the reflection group information includes: a boundary node group, the boundary node group includes at least two boundary nodes in the first network; an identifier of the reflection group; a group protocol of the reflection group, and the group protocol is to add the first protocol to the second protocol The protocol corresponding to the protocol header; the network controller configures the reflection group according to the reflection group information.
  • the network controller may divide each boundary node group in the first network into different groups according to a preset rule, etc., each group is called a reflection group, and the network controller acquires reflection group information corresponding to each reflection group.
  • the reflection group information includes: a boundary node group including at least two boundary nodes, an identifier of the reflection group, and a group protocol of the reflection group.
  • the group protocol of the reflection group can be understood as a protocol corresponding to the protocol header of the first protocol added to the second protocol, that is, if the protocol packet received by the SDN controller is the second protocol added with the first protocol message header.
  • the protocol packet is parsed to identify the protocol packet of the first protocol.
  • the network controller configures the reflection group according to the reflection group information.
  • the network controller determines the reflection group to which the first boundary node belongs, and sends the reflection group information to each boundary node included in the boundary node group of the reflection group corresponding to the identifier according to the identifier of the reflection group.
  • the network controller queries the reflection group information to determine that the group protocol network controller adds a routing protocol message to the protocol header of the first protocol to generate a group protocol routing protocol message, and the group protocol The routing protocol message is sent to other boundary nodes in the boundary node group except the first boundary node.
  • FIG. 7 is a signaling diagram of Embodiment 5 of the method for inter-network communication according to the present invention.
  • the OpenFlow protocol and the GMPLS-related protocol are deployed on the border nodes A, B, and C of the first network, and the GMPLS-related protocol is not required to be deployed on the intermediate node H.
  • the SDN controller and the border nodes A, B, and C are configured with a reflection group:
  • the protocol used by the reflection group is the OpenFlow message type corresponding to the OSPF-TE protocol, that is, if the protocol packet received by the SDN controller is an OpenFlow message added.
  • the OSPF-TE protocol packet of the header identifies the OSPF-TE protocol packet.
  • the identity of the reflection group is 2, and the members of the reflection group are border nodes A, B, and C.
  • the information of the reflection group is sent to the boundary. Nodes A, B, and C, configure reflection groups on boundary nodes A, B, and C. This embodiment includes the following steps:
  • Node D of the GMPLS network S sends an OSPF-TE message to the first border node A of the SDN network.
  • the node D of the GMPLS network S is sent to the first border node A connected thereto.
  • the first boundary node A queries the reflection group.
  • the first border node A extracts the traffic engineering data in the OSPF-TE message to the local traffic engineering database, and queries the reflection group to identify the reflection group corresponding to the first boundary node A, and finds other boundaries.
  • the node determines that the next node of the OSPF-TE message is a boundary node other than the first boundary node A in the reflection group.
  • the first border node A constructs a group protocol message.
  • the first border node A adds an OpenFlow protocol message header to the OSPF-TE message, thereby constructing a group protocol message, for example:
  • the message type is OF—OSPF—TE
  • the message length is OSPF-TE packet length plus OPENFLOW header length.
  • the first border node A sends a group protocol message to the SDN controller.
  • the SDN controller reflects the group protocol message.
  • the SDN controller finds that it is a group protocol message, and then confirms the reflection group corresponding to the first boundary node A according to the first boundary node A, and determines other boundary nodes in the reflection group, thereby The other boundary nodes other than the first boundary node A are sent out to the reflection group, for example, the second boundary node B sends a group protocol message.
  • the second border node B stores the traffic engineering data of the GMPLS network S.
  • the second border node B strips the OpenFlow protocol.
  • the OSPF-TE message is obtained, and the OSPF-TE message is processed to obtain the traffic engineering data of the SDN network and stored.
  • the second border node B floods the OSPF-TE message.
  • the second border node B can spread the OSPF-TE message to the node of the GMPLS network D, thereby implementing the GMPLS network D flooding the traffic engineering data of the GMPLS network S across the SDN network.
  • the routing protocol message of the GMPLS network S is transmitted to the GMPLS network D across the SDN network.
  • the routing message between the first border node A and the second border node B in the SDN network is sent to the GMPLS network D. The process of transmission is described.
  • the first border node A sends an OpenFlow protocol message query to the SDN controller between the first border node A and the second border node B.
  • the SDN network controller calculates the path between the first boundary node A and the second boundary node B after receiving the query message, and sends the calculated traffic engineering data to the first.
  • the border node A, the first border node A stores the traffic engineering data, the traffic engineering data is packaged into an OSPF-TE message, and the OpenFlow protocol message header is encapsulated to construct a group protocol message, and then step 504 is performed, thereby implementing the traffic carried in the SDN network.
  • the routing message of the engineering data is transmitted to the GMPLS network D.
  • FIG. 4, FIG. 5, and FIG. 7 all illustrate the present invention by taking the first network as the SDN network, the second network, and the third network as the GMPLS network.
  • the second network and the third network may also be a Border Gateway Protocol (BGP) network.
  • BGP Border Gateway Protocol
  • the SDN network controller does not need to support the BGP protocol; or
  • the second network and the third network may also be a network using a Label Distribution Protocol (LDP). At this time, the SDN network controller does not need to support the LDP protocol.
  • LDP Label Distribution Protocol
  • FIG. 8 is a schematic structural diagram of Embodiment 1 of an inter-network communication apparatus according to the present invention.
  • the inter-network communication device provided in this embodiment may be disposed on the boundary node or the boundary node itself, and is an apparatus embodiment corresponding to the embodiment of the present invention. The specific implementation process is not described herein.
  • the inter-network communication device 100 provided by this embodiment specifically includes:
  • the receiving module 11 is configured to receive a first path establishment request message sent by the second network, where the first path establishment request message carries routing information of the second network to the third network, where the first side
  • the boundary node is connected to the second network, and the second boundary node is connected to the third network, where the first network is a network of a first protocol, and the second network is a second network a network of protocols, where the first protocol and the second protocol are different protocols;
  • the processing module 12 is configured to establish a second path establishment application message according to the first path establishment application message received by the receiving module 11;
  • the sending module 13 is configured to send, to the second border node, the second path establishment request message constructed by the processing module 12, so that the second border node establishes a service path with the third network;
  • the receiving module 11 is further configured to receive a path setup response message sent by the second border node.
  • the inter-network communication device establishes a signaling path by transmitting a signaling protocol message to establish a service path for the second network to communicate with the third network across the first network, and the service data can be obtained according to the service path.
  • the end-to-end transmission process in which the second network is transmitted to the third network across the first network.
  • the second protocol is not required to be deployed on the network controller of the first network, which reduces the signaling overhead of the network controller during the cross-communication process, thereby reducing the performance requirements of the network controller and saving costs.
  • processing module 12 is further configured to: establish an application message according to the first path, and determine a second boundary node;
  • the sending module 13 is further configured to send a path calculation request message to the network controller, so that the network controller calculates and establishes a service path between the first border node and the second border node;
  • the receiving module 11 is further configured to receive a path calculation success response message sent by the network controller. Further, the sending module 13 is configured to send the second path establishment request message to the second border node, so that the second border node sends a path calculation request message to the network controller, so that the The network controller calculates and establishes a service path between the first boundary node and the second boundary node.
  • processing module 12 is configured to establish a second path establishment request message of the second protocol according to the first path establishment application message;
  • the sending module 13 is configured to send the second path establishment request message directly to the second border node.
  • processing module 12 is configured to establish a second path establishment request message of the first protocol according to the first path establishment application message;
  • the sending module 13 is configured to send, by using a network controller, the second path establishment request message to the second border node, where the network controller is a network controller of the first network.
  • the first network is a software-defined network
  • the first protocol is an OpenFlow protocol
  • the second network and the third network are general multi-protocol label switching GMPLS networks of different network segments, and a border gateway protocol BGP of different network segments.
  • Label distribution protocol LDP network for networks or different network segments.
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of an inter-network communication apparatus according to the present invention.
  • the inter-network communication device provided by this embodiment may be disposed on the boundary node or the boundary node itself, and is an apparatus embodiment corresponding to the embodiment of FIG. 6 of the present invention. The specific implementation process is not described herein.
  • the inter-network communication device 200 provided by this embodiment specifically includes:
  • the receiving module 21 is configured to receive a routing protocol message of the second network sent by the first border node of the first network;
  • the processing module 22 is configured to query a reflection group, where the reflection group includes at least the first boundary node and the second boundary node, where the first boundary node is connected to the second network, and the second boundary The node is connected to the third network, where the first network is the network of the first protocol, the second network and the third network are the network of the second protocol, the first protocol and the second protocol For different agreements;
  • the sending module 23 is configured to send the routing protocol message to the second border node.
  • the inter-network communication device transmits the routing information of the first network to the third network via the first network by transmitting a routing protocol message, and the routing information is transmitted from the second network to the third network across the first network. End-to-end transmission process.
  • the second protocol is not required to be deployed on the network controller of the first network, which reduces the signaling overhead of the network controller during the cross-communication process, thereby reducing the performance requirements of the network controller and saving costs.
  • the processing module 22 is configured to acquire the reflection group information, where the reflection information includes: a boundary node group, where the boundary node group includes at least two boundary nodes in the first network;
  • the group protocol is a protocol corresponding to a protocol header of the first protocol added to the second protocol
  • the processing module 22 is further configured to configure the reflection group according to the reflection group information. Further, the processing module 22 is configured to determine a reflection group to which the first boundary node belongs, and the sending module 23 is configured to include, according to the identifier of the reflection group, a boundary node group of the reflection group corresponding to the identifier Each boundary node sends the reflection group information.
  • processing module 22 is configured to query the reflection group information to determine the group protocol, and add a protocol header of the first protocol to the routing protocol message to generate a routing protocol message of the group protocol.
  • the sending module 23 is configured to send a routing protocol message of the group protocol to other boundary nodes in the boundary node group except the first boundary node.
  • the first network is a software-defined network
  • the first protocol is an OpenFlow protocol
  • the second network and the third network are common multi-protocol label switching GMPLS networks of different network segments, and a border gateway protocol BGP network of different network segments. Or label distribution protocol LDP network on different network segments.
  • FIG. 10 is a schematic structural diagram of Embodiment 3 of an inter-network communication apparatus according to the present invention.
  • the inter-network communication device provided in this embodiment may be disposed on the boundary node or the boundary node itself, and is an apparatus embodiment corresponding to the embodiment of the present invention. The specific implementation process is not described herein.
  • the inter-network communication device 300 provided by this embodiment specifically includes:
  • the processor 31 and the memory 32 store the execution instructions.
  • the processor 31 communicates with the memory 32, and the processor 31 executes the execution instructions so that the inter-network communication device 300 executes as shown in FIG.
  • the implementation method of the method is similar to the technical effect, and details are not described herein again.
  • FIG. 11 is a schematic structural diagram of Embodiment 4 of an inter-network communication apparatus according to the present invention.
  • the inter-network communication device provided by this embodiment may be disposed on the boundary node or the boundary node itself, and is an apparatus embodiment corresponding to the embodiment of FIG. 6 of the present invention.
  • the specific implementation process is not described herein.
  • the inter-network communication device 400 provided by this embodiment specifically includes:
  • the processor 41 and the memory 42, the memory 42 stores execution instructions, when the inter-network communication device
  • the processor 41 communicates with the memory 42, and the processor 41 executes the execution instruction, so that the inter-network communication device 400 performs the method embodiment shown in FIG. 6.
  • the implementation principle and technical effects are similar, and details are not described herein. .
  • the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

L'invention porte sur un procédé et sur un dispositif permettant des communications multiréseaux. Le procédé consiste à : établir un chemin par l'intermédiaire d'une signalisation en transmettant un message de protocole de signalisation de telle sorte qu'un chemin de service pour des communications soit établi entre un deuxième réseau et un troisième réseau croisant le premier réseau, réaliser un procédé de transmission d'un bout à l'autre selon lequel les données de service peuvent être transmises du deuxième réseau au troisième réseau en coupant le premier réseau selon le chemin de service. Pendant le procédé de transmission, il n'y a pas besoin de déployer un second protocole sur un dispositif de commande de réseau du premier réseau, et la surcharge de signalisation du dispositif de commande de réseau est réduite pendant le traitement de multiples communications, ce qui permet de réduire les exigences de performance sur le dispositif de commande de réseau et de réduire le coût.
PCT/CN2013/083488 2013-09-13 2013-09-13 Procédé et dispositif permettant des communications multiréseaux WO2015035616A1 (fr)

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