WO2018068588A1 - 提供组播业务的方法和软件定义网络控制器 - Google Patents
提供组播业务的方法和软件定义网络控制器 Download PDFInfo
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Definitions
- the present application relates to the field of information technology and, more particularly, to a method and software defined network controller for providing multicast services.
- the server providing the application service may use the multicast (English: Multicast) service to make the same copy when transmitting data to the terminal device.
- the data packet is sent to multiple terminal devices.
- the current scheme for providing multicast services can be classified into a dynamic multicast scheme and a static multicast scheme.
- a dynamic multicast scheme devices in the bearer network can sense multicast service sources and multicast service requests, and provide multicast service services according to requirements.
- the dynamic multicast scheme requires that the related devices in the bearer network support the dynamic multicast protocol, and implement dynamic multicast signaling to implement multicast source information advertisement, multicast group creation/deletion, and group member addition/deletion.
- a dynamic multicast protocol needs to be deployed in the related device of the bearer network. When the network of the bearer network is large, it takes a lot of time to deploy a dynamic multicast protocol in the related device.
- a static multicast scheme implements multicast services through centralized network management.
- the centralized network management system can only pre-deploy the multicast service solution and cannot sense the current state of the bearer network in real time. This may result in waste of the bearer network resources.
- both the dynamic multicast scheme and the static multicast scheme require the terminal device and the application server to support the multicast technology.
- the Internet Group Management Protocol IGMP
- the current multicast scheme has higher requirements for application servers and terminal devices, which increases the complexity of deploying multicast services.
- the current dynamic multicast scheme and the static multicast scheme also require the device in the bearer network to respond to the multicast service request of the terminal device, which causes the device in the bearer network to have the risk of protocol packet attack. The more devices in the bearer network, the greater the risk of being attacked.
- the embodiments of the present application provide a method for providing a multicast service and a software-defined network controller, which can provide a dynamic multicast service.
- the embodiment of the present application provides a method for providing a multicast service, where the method includes: a software-defined network SDN controller acquires target path establishment information, where the target path establishment information includes an Internet protocol of a service server that provides target service data. An IP address and an IP address of the terminal device that requests the target service data; the SDN controller determines the target path according to the IP address of the service server, the IP address of the terminal device, and the topology structure of the forwarding device in the bearer network, where the target path is determined.
- the target path includes multiple forwarding devices in the bearer network;
- the SDN controller acquires a target multicast IP address corresponding to the target service data and a target multicast medium access control MAC address corresponding to the target service data; the SDN controller according to the target multicast IP address, the target multicast MAC address Determining a target forwarding rule, the target forwarding rule including the target multicast IP address and the target multicast MAC address, the destination forwarding rule, the IP address of the terminal device, the MAC address of the terminal device, and the target path, where the target forwarding rule is used And indicating that the plurality of forwarding devices in the target path send the target service data carried by the first target packet sent by the service server to the terminal device, where the source IP address of the first target packet is the service server The IP address, the destination IP address of the first target packet is an IP address of the terminal device, and the SDN controller separately sends the target forwarding rule to multiple forwarding devices in the target path.
- the service server may send the target service data requested by the terminal device to the terminal device in a unicast manner.
- the terminal device can also receive the target service data sent by the service server in a unicast manner.
- both the service server and the terminal device do not need to support the multicast protocol.
- the configuration of the device in the bearer network in the foregoing technical solution is simple, and the dynamic multicast service can also be provided.
- the SDN controller is responsible for controlling the entire forwarding process, and the forwarding device processes the received packet according to the forwarding rule configured by the SDN controller. In this way, only the forwarding devices in the bearer network can be configured without separately configuring each device in the bearer network.
- the SDN controller can obtain the running status of each forwarding device in the bearer network, so the SDN controller can adjust the multicast service plan according to the running status of the forwarding device in the bearer network to determine a suitable transport destination service.
- the target path of the data can be obtained.
- the SDN controller determines, according to an IP address of the service server, an IP address of the terminal device, and a topology structure of the forwarding device in the bearer network.
- the target path includes: the SDN controller determines, according to the IP address of the service server and the topology structure of the forwarding device in the bearer network, the ingress node of the target path in the bearer network, where the ingress node is the first The target packet enters the forwarding device of the bearer network; the SDN controller determines, according to the IP address of the terminal device and the topology structure of the forwarding device in the bearer network, the egress node of the target path in the bearer network, where The egress node leaves the forwarding device of the bearer network for the first target packet.
- the SDN controller can determine the ingress node and the egress node of the target path in the bearer network, so that corresponding forwarding rules can be configured for the
- the SDN controller is configured according to the target multicast IP address, the target multicast MAC address, and the terminal device
- the IP address, the MAC address of the terminal device, and the target path determine the target forwarding rule, including: the SDN controller determines the first of the target forwarding rules according to the target multicast IP address and the target multicast MAC address.
- the first forwarding rule includes the target multicast IP address and the target multicast MAC address, where the first forwarding rule is used to instruct the ingress node to pass the target service data carried by the first target packet to the second
- the destination packet is sent to the next hop node of the ingress node in the target path, where the source IP address of the second target packet is the IP address of the service server, and the destination IP address of the second target packet is the a destination multicast IP address, where the destination MAC address of the second target packet is the target multicast MAC address;
- the SDN controller determines the destination according to the IP address of the terminal device and the MAC address of the terminal device
- a second forwarding rule in the forwarding rule where the second forwarding rule includes an IP address of the terminal device and a MAC address of the terminal device, where the second forwarding rule is used to indicate that the egress node will use the egress node from the target path
- the target service data carried by the second target packet received by the last hop node is sent to the terminal device
- the SDN controller separately sends the target forwarding rule to the multiple forwarding devices in the target path, including The SDN controller sends the first forwarding rule in the target forwarding rule to the ingress node in the target path; the SDN controller sends the second forwarding rule in the target forwarding rule to the egress node in the target path .
- the SDN controller can separately send the determined forwarding rule to the corresponding forwarding device, so that the forwarding device can forward the received packet according to the forwarding rule.
- the SDN The controller determines the target path according to the IP address of the service server, the IP address of the terminal device, and the topology of the forwarding device in the bearer network, and further includes: the SDN controller determines an intermediate node of the target path, and the intermediate node A forwarding device between the ingress node and the egress node on the target path.
- the SDN controller may determine that the target path is an intermediate node in the bearer network, so that a corresponding forwarding rule may be configured for the intermediate node.
- the SDN controller is configured according to the target multicast IP address, the target multicast MAC address, and the terminal device The IP address, the MAC address of the terminal device, and the target path, the target forwarding rule is determined, including: the SDN controller determines a third forwarding rule, where the third forwarding rule is used to indicate that the intermediate node will be in the middle of the target path The second target message received by the previous hop node of the node is sent to the next hop node of the intermediate node in the target path.
- the SDN controller configures a corresponding forwarding rule for the intermediate node of the target path in the bearer network, so that the data sent by the service server can be sent to the terminal device.
- the SDN controller separately sends the target forwarding rule to the multiple forwarding devices in the target path, including The SDN controller sends the third forwarding rule in the target forwarding rule to the intermediate node.
- the SDN controller can send the determined forwarding rule to the corresponding forwarding device, so that the forwarding device can forward the received packet according to the forwarding rule.
- the SDN controller acquires a target multicast IP address corresponding to the target service data.
- the method further includes: the SDN controller receiving an identifier of the N service data sent by the service server; the SDN controller determining N multicast IP addresses, the N multicast IP addresses and the N service data One-to-one correspondence.
- the SDN controller can determine the correspondence between the service data and the multicast IP address to ensure that each service data is assigned a corresponding multicast IP address.
- an embodiment of the present application provides a software-defined network controller, where the software-defined network controller includes a unit that performs any of the possible implementations of the first aspect or the first aspect.
- an embodiment of the present application provides a software defined network controller, where the software defines a network controller, including a processor, a memory, and a transceiver. a memory for storing any of the first aspect and the first aspect Instructions for possible implementation methods.
- the processor executes the instructions stored in the memory in conjunction with the transceiver to implement the method of the first aspect or any of the possible implementations of the first aspect.
- 1 is a system architecture diagram including an SDN controller, a forwarding device, a service server, and a terminal device.
- FIG. 2 is a schematic flowchart of a method for providing a multicast service according to an embodiment of the present application.
- FIG. 3 is a structural block diagram of an SDN controller according to an embodiment of the present application.
- FIG. 4 is a structural block diagram of an SDN controller according to an embodiment of the present application.
- FIG. 1 is a system architecture diagram including a software defined network (English: Software Defined Network, SDN) controller (English: Controller), a forwarding device, a service server, and a terminal device.
- the system 100 shown in FIG. 1 includes a service server 101, a forwarding device in the bearer network 110, and an SDN controller 111 and a CE device 120 for managing forwarding devices in the bearer network.
- the bearer network 110 shown in FIG. 1 includes a forwarding device 112, a forwarding device 113, and a forwarding device 114.
- the SDN controller for managing the forwarding device in the bearer network is managed by the operator.
- the SDN controller for managing the forwarding device in the bearer network may be considered as a network device in the bearer network, and may not be considered as a network device in the bearer network.
- the forwarding device in the bearer network may be a device edge (English: Provider Edge, PE for short) or an operator (English: Provider, P: abbreviation: P).
- the forwarding device 112 and the forwarding device 114 are PE devices
- the forwarding device 113 is a P device.
- the bearer network includes only two forwarding devices
- the two forwarding devices are all PE devices. If a path in the bearer network includes only two forwarding devices, the two forwarding devices are PE devices.
- the forwarding device in the bearer network may send the target service data sent by the service server 101 to the CE device 120 according to the target forwarding rule.
- a forwarding device 116 (not shown) is further included between the forwarding device 113 and the forwarding device 114 in the target path.
- the forwarding device 113 may send the second target packet to the forwarding device 116.
- the forwarding device 116 may send the second target packet to the forwarding device 114.
- the processing unit 301 is further configured to determine, according to an IP address of the service server, an IP address of the terminal device, and a topology structure of the forwarding device in the bearer network, where the target path includes multiple forwarding devices in the bearer network. .
- Processor 401 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 401 or an instruction in a form of software.
- the processor 401 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA field programmable gate array
- memory 402 may store instructions for performing the method performed by the SDN controller in the method of FIG. 2.
- the processor 401 can execute the instructions stored in the memory 402 in combination with other hardware (for example, the transceiver 403) to complete the steps performed by the SDN controller in the method shown in FIG. 2.
- the transceiver 403 can be seen in the embodiment shown in FIG. Description of the SDN controller.
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Abstract
Description
Claims (16)
- 一种提供组播业务的方法,其特征在于,所述方法包括:软件定义网络SDN控制器获取目标路径建立信息,所述目标路径建立信息包括提供目标业务数据的业务服务器的互联网协议IP地址和请求获取所述目标业务数据的终端设备的IP地址;所述SDN控制器根据所述业务服务器的IP地址、所述终端设备的IP地址以及承载网中的转发设备的拓扑结构,确定目标路径,所述目标路径包括所述承载网中的多个转发设备;所述SDN控制器获取对应于所述目标业务数据的目标组播IP地址和对应于所述目标业务数据的目标组播介质访问控制MAC地址;所述SDN控制器根据所述目标组播IP地址、所述目标组播MAC地址、所述终端设备的IP地址、所述终端设备的MAC地址和所述目标路径,确定目标转发规则,所述目标转发规则包括所述目标组播IP地址和所述目标组播MAC地址,所述目标转发规则用于指示所述目标路径中的多个转发设备将所述业务服务器发送的第一目标报文携带的所述目标业务数据发送至所述终端设备,其中,所述第一目标报文的源IP地址为所述业务服务器的IP地址,所述第一目标报文的目的IP地址为所述终端设备的IP地址;所述SDN控制器分别将所述目标转发规则发送至所述目标路径中的多个转发设备。
- 如权利要求1所述的方法,其特征在于,所述SDN控制器根据所述业务服务器的IP地址、所述终端设备的IP地址以及所述承载网中的转发设备的拓扑结构,确定目标路径,包括:所述SDN控制器根据所述业务服务器的IP地址和所述承载网中的转发设备的拓扑结构,确定所述目标路径在所述承载网中的入节点,其中,所述入节点为所述第一目标报文进入所述承载网的转发设备;所述SDN控制器根据所述终端设备的IP地址和所述承载网中的转发设备的拓扑结构,确定所述目标路径在所述承载网中的出节点,其中,所述出节点为所述第一目标报文离开所述承载网的转发设备。
- 如权利要求2所述的方法,其特征在于,所述SDN控制器根据所述目标组播IP地址、所述目标组播MAC地址、所述终端设备的IP地址、所述终端设备的MAC地址和所述目标路径,确定目标转发规则,包括:所述SDN控制器根据所述目标组播IP地址和所述目标组播MAC地址,确定所述目标转发规则中的第一转发规则,所述第一转发规则包括所述目标组播IP地址和所述目标组播MAC地址,所述第一转发规则用于指示所述入节点将所述第一目标报文携带的所述目标业务数据通过第二目标报文发送至所述目标路径中所述入节点的下一跳节点,其中,所述第二目标报文的源IP地址为所述业务服务器的IP地址,所述第二目标报文的目的IP地址为所述目标组播IP地址,所述第二目标报文的目的MAC地址为所述目标组播MAC地址;所述SDN控制器根据所述终端设备的IP地址和所述终端设备的MAC地址,确定 所述目标转发规则中的第二转发规则,所述第二转发规则包括所述终端设备的IP地址和所述终端设备的MAC地址,所述第二转发规则用于指示所述出节点将从所述目标路径中所述出节点的上一跳节点接收的所述第二目标报文携带的所述目标业务数据通过第三目标报文发送至所述终端设备,其中,所述第三目标报文的源IP地址为所述业务服务器的IP地址,所述第三目标报文的目的IP地址为所述终端设备的IP地址,所述第三目标报文的目的MAC地址为所述终端设备的MAC地址。
- 如权利要求3所述的方法,其特征在于,所述SDN控制器分别将所述目标转发规则发送至所述目标路径中的多个转发设备,包括:所述SDN控制器将所述目标转发规则中的第一转发规则发送至所述目标路径中的入节点;所述SDN控制器将所述目标转发规则中的第二转发规则发送至所述目标路径中的出节点。
- 如权利要求2至4中任一项所述的方法,其特征在于,所述SDN控制器根据所述业务服务器的IP地址、所述终端设备的IP地址以及所述承载网中的转发设备的拓扑结构,确定目标路径,还包括:所述SDN控制器确定所述目标路径的中间节点,所述中间节点为所述目标路径上所述入节点与所述出节点之间的转发设备。
- 如权利要求5所述的方法,其特征在于,所述SDN控制器根据所述目标组播IP地址、所述目标组播MAC地址、所述终端设备的IP地址、所述终端设备的MAC地址和所述目标路径,确定目标转发规则,包括:所述SDN控制器确定第三转发规则,所述第三转发规则用于指示所述中间节点将从所述目标路径中所述中间节点的上一跳节点接收到的所述第二目标报文发送至该目标路径中所述中间节点的下一跳节点。
- 如权利要求6所述的方法,其特征在于,所述SDN控制器分别将所述目标转发规则发送至所述目标路径中的多个转发设备,包括:所述SDN控制器将所述目标转发规则中的第三转发规则发送至所述中间节点。
- 如权利要求1至7中任一项所述的方法,其特征在于,在所述SDN控制器获取对应于所述目标业务数据的目标组播IP地址之前,所述方法还包括:所述SDN控制器接收所述业务服务器发送的N个业务数据的标识;所述SDN控制器确定N个组播IP地址,所述N个组播IP地址与所述N个业务数据的标识一一对应。
- 一种软件定义网络SDN控制器,其特征在于,所述SDN控制器包括:处理单元,用于获取目标路径建立信息,所述目标路径建立信息包括提供目标业务数据的业务服务器的互联网协议IP地址和请求获取所述目标业务数据的终端设备的IP地址;所述处理单元,还用于根据所述业务服务器的IP地址、所述终端设备的IP地址以及所述承载网中的转发设备的拓扑结构,确定目标路径,所述目标路径包括所述承载网中的多个转发设备;所述处理单元,还用于获取对应于所述目标业务数据的目标组播IP地址和对应于所述目标业务数据的目标组播介质访问控制MAC地址;所述处理单元,还用于根据所述目标组播IP地址、所述目标组播MAC地址、所述终端设备的IP地址、所述终端设备的MAC地址和所述目标路径,确定目标转发规则,所述目标转发规则包括所述目标组播IP地址和所述目标组播MAC地址,所述目标转发规则用于指示所述目标路径中的多个转发设备将所述业务服务器发送的第一目标报文携带的所述目标业务数据发送至所述终端设备,其中,所述第一目标报文的源IP地址为所述业务服务器的IP地址,所述第一目标报文的目的IP地址为所述终端设备的IP地址;通信单元,用于分别将所述目标转发规则发送至所述目标路径中的多个转发设备。
- 如权利要求9所述的SDN控制器,其特征在于,所述处理单元,具体用于根据所述业务服务器的IP地址和所述承载网中的转发设备的拓扑结构,确定所述目标路径在所述承载网中的入节点,其中,所述入节点为所述第一目标报文进入所述承载网的转发设备;根据所述终端设备的IP地址和所述承载网中的转发设备的拓扑结构,确定所述目标路径在所述承载网中的出节点,其中,所述出节点为所述第一目标报文离开所述承载网的转发设备。
- 如权利要求10所述的SDN控制器,其特征在于,所述处理单元,具体用于根据所述目标组播IP地址和所述目标组播MAC地址,确定所述目标转发规则中的第一转发规则,所述第一转发规则包括所述目标组播IP地址和所述目标组播MAC地址,所述第一转发规则用于指示所述入节点将所述第一目标报文携带的所述目标业务数据通过第二目标报文发送至所述目标路径中所述入节点的下一跳节点,其中,所述第二目标报文的源IP地址为所述业务服务器的IP地址,所述第二目标报文的目的IP地址为所述目标组播IP地址,所述第二目标报文的目的MAC地址为所述目标组播MAC地址;根据所述终端设备的IP地址和所述终端设备的MAC地址,确定所述目标转发规则中的第二转发规则,所述第二转发规则包括所述终端设备的IP地址和所述终端设备的MAC地址,所述第二转发规则用于指示所述出节点将从所述目标路径中所述出节点的上一跳节点接收的所述第二目标报文携带的所述目标业务数据通过第三目标报文发送至所述终端设备,其中,所述第三目标报文的源IP地址为所述业务服务器的IP地址,所述第三目标报文的目的IP地址为所述终端设备的IP地址,所述第三目标报文的目的MAC地址为所述终端设备的MAC地址。
- 如权利要求11所述的SDN控制器,其特征在于,所述通信单元,具体用于将所述目标转发规则中的第一转发规则发送至所述目标路径中的入节点,将所述目标转发规则中的第二转发规则发送至所述目标路径中的出节点。
- 如权利要求10至12中任一项所述的SDN控制器,其特征在于,所述处理单元,具体用于确定所述目标路径的中间节点,所述中间节点为所述目标路径上所述入节点与所述出节点之间的转发设备。
- 如权利要求13所述的SDN控制器,其特征在于,所述处理单元,具体用于确定第三转发规则,所述第三转发规则用于指示所述中间节点将从所述目标路径中所述中间节点的上一跳节点接收到的所述第二目标报文发送至该目标路径中所述中间节 点的下一跳节点。
- 如权利要求14所述的SDN控制器,其特征在于,所述通信单元,具体用于将所述目标转发规则中的第三转发规则发送至所述中间节点。
- 如权利要求9至15中任一项所述的SDN控制器,其特征在于,所述通信单元,还用于接收所述业务服务器发送的N个业务数据的标识;所述处理单元,还用于确定N个组播IP地址,所述N个组播IP地址与所述N个业务数据的标识一一对应。
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