WO2023029902A1 - Système de protection à double anneau, procédé de protection à double anneau et dispositif associé - Google Patents

Système de protection à double anneau, procédé de protection à double anneau et dispositif associé Download PDF

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Publication number
WO2023029902A1
WO2023029902A1 PCT/CN2022/111079 CN2022111079W WO2023029902A1 WO 2023029902 A1 WO2023029902 A1 WO 2023029902A1 CN 2022111079 W CN2022111079 W CN 2022111079W WO 2023029902 A1 WO2023029902 A1 WO 2023029902A1
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Prior art keywords
route
otn
service data
side device
pipe
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PCT/CN2022/111079
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English (en)
Chinese (zh)
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罗贤龙
谢刚
李�浩
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华为技术有限公司
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Publication of WO2023029902A1 publication Critical patent/WO2023029902A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems

Definitions

  • the present application relates to the field of optical communication, in particular to a dual-homing protection system, a dual-homing protection method and related equipment.
  • FIG. 1 is a schematic structural diagram of an optical communication system using the OTN technology.
  • the optical communication system includes a user-side device 101 , a first service provider edge (provider edge, PE) PE device 102 , a second PE device 103 and a network-side device 104 .
  • the user-side device 101 is connected to the first PE device 102 .
  • the second PE device 103 is connected to the network side device 104 .
  • An OTN pipe is established between the first PE device 102 and the second PE device 103 .
  • the first PE device 102 After the user side device 101 sends the forward service data to the first PE device 102, the first PE device 102 sends the forward service data to the second PE device 103 through the OTN pipe.
  • the network side device 104 receives forward service data from the second PE device 103 .
  • the present application provides a dual-homing protection system, a dual-homing protection method and related equipment. By establishing different OTN pipes for the first PE equipment, the reliability of the system can be improved.
  • the first aspect of the present application provides a dual-homing protection system.
  • the dual-homing protection system includes a first PE device, a second PE device, and a third PE device.
  • a first OTN pipe is established between the first PE device and the second PE device.
  • a second OTN pipe is established between the first PE device and the third PE device.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • the first PE device is configured with a first primary route and a first backup route.
  • the destination address of the first primary route and the first standby route is an Internet Protocol (internet protocol, IP) address of the network side device.
  • IP Internet Protocol
  • the first PE device is configured to receive the first forward service data from the user side device. If the first OTN pipe is in a normal state, the first PE device is configured to send the first forward service data to the network side device through the first main route. If the first OTN pipe is in an abnormal state, the first PE device is configured to send the first forward service data to the network side device through the first standby route.
  • system reliability can be improved by establishing the first OTN pipe and the second OTN pipe for the first PE device.
  • the second PE device is configured with a second forward primary route and a second forward standby route.
  • the destination address of the second forward primary route and the second forward standby route is the IP address of the network side device.
  • the next hop of the second forward main route is the network side device.
  • the next hop of the second forward standby route is the third PE device.
  • the second PE device is configured to receive the first forward service data from the user side device.
  • the second channel is in a normal state
  • the second PE device is configured to send the first forward service data to the network side device through the second forward main route.
  • the second channel is in an abnormal state
  • the second PE device is configured to send the first forward service data to the network side device through the second forward standby route.
  • the second PE device may directly send the first forward service data to the network side device through the second forward standby route. Therefore, the second PE device may not need to exchange information for line switching with the third PE device, thereby improving switching efficiency.
  • the third PE device is configured with a third forward primary route and a third forward standby route.
  • the destination address of the third forward primary route and the third forward standby route is the IP address of the network side device.
  • the next hop of the third forward main route is the network side device.
  • the next hop of the third forward standby route is the second PE device.
  • the third PE device is configured to receive the first forward service data from the user side device. If the third channel is in a normal state, the third PE device is configured to send the first forward service data to the network side device through the third forward main route. If the third channel is in an abnormal state, the third PE device is configured to send the first forward service data to the network side device through the third forward standby route. Wherein, when the third channel fails, the third PE device may directly send the first forward service data to the network side device through the third forward standby route. Therefore, the third PE device may not need to exchange information for line switching with the second PE device, thereby improving switching efficiency.
  • the second PE device is configured with a second reverse primary route and a second reverse backup route.
  • the destination address of the second reverse main route and the second reverse standby route is the IP address of the user-side device.
  • the next hop of the second reverse primary route is the first PE device, and the next hop of the second forward standby route is the third PE device.
  • the second channel is in a normal state, the second PE device is used to receive reverse service data from the network side device.
  • the first OTN pipe is in a normal state
  • the second PE device is configured to send reverse service data to the user side device through the second reverse main route.
  • the first OTN pipe is in an abnormal state
  • the second PE device is configured to send reverse service data to the user side device through the second reverse standby route.
  • the second PE device may directly send reverse service data to the user side device through the second reverse standby route. Therefore, the second PE device may not need to exchange information for line switching with the third PE device, thereby improving switching efficiency.
  • the third PE device is configured with a third reverse primary route and a third reverse backup route.
  • the destination address of the third reverse main route and the third forward standby route is the IP address of the user-side device.
  • the next hop of the third reverse primary route is the first PE device.
  • the next hop of the third forward standby route is the second PE device. If the second channel is in an abnormal state, the third PE device is used to receive reverse service data from the network side device. If the second OTN pipe is in a normal state, the third PE device is configured to send reverse service data to the user side device through the third reverse main route. If the second OTN pipe is in an abnormal state, the second PE device is configured to send reverse service data to the user side device through the third reverse standby route. Wherein, when the second OTN pipe fails, the third PE device may directly send reverse service data to the user side device through the third reverse standby route. Therefore, the third PE device may not need to exchange information for line switching with the second PE device, thereby improving switching efficiency.
  • the first PE device if the first OTN pipe and the second channel are in a normal state, the first PE device is configured to send the first forward service data to the network side device through the first main route. If the first OTN pipe or the second channel is in an abnormal state, the first PE device is configured to send the first forward service data to the network side device through the first standby route. Wherein, when no channel is established between the second PE device and the third PE device, if the second channel is in an abnormal state, the network side device cannot receive the first forward service data through the first OTN pipe. In this application, only when the first OTN pipe and the second channel are in a normal state, the first PE device sends the first forward service data to the network side device through the first main route. Therefore, the present application can improve the reliability of communication.
  • the first PE device is further configured to receive the first detection data from the second PE device.
  • the first PE device is also used to confirm whether the second channel is in a normal state according to the first detection data.
  • the first PE device cannot directly detect whether the second channel is in a normal state through bidirectional forwarding detection (bidirectional forwarding detection, BFD).
  • BFD bidirectional forwarding detection
  • the first PE device may determine whether the second channel is in a normal state through the first detection data. Therefore, the present application can improve the reliability of communication.
  • the first PE device is further configured to receive the information of the first main route from the second PE device.
  • the first PE device is further configured to receive the information of the first backup route from the third PE device.
  • the user may configure the first primary route and the first backup route on the first PE device through manual configuration.
  • the present application can obtain the first primary route and the first backup route by extending the path computation element communication protocol (path computation element communication protocol, PCEP) protocol.
  • PCEP path computation element communication protocol
  • the first PE device receives the information of the first primary route from the second PE device.
  • the first PE device receives information about the first backup route from the third PE device. Therefore, the present application can reduce labor costs.
  • the first PE device is further configured to detect whether the first OTN pipe is in a normal state by using an OTN pipe state detection technology.
  • OTN pipe state detection technology BFD is a three-layer detection technology.
  • the first PE device 201 detects the state of the first OTN pipe at the physical layer. Therefore, the present application can save physical resources for detection.
  • the first PE device is configured to receive the first forward service data from the user-side device through the first optical virtual private network (OVPN).
  • the first PE device is also configured with a second primary route and a second backup route.
  • the destination addresses of the second primary route and the second standby route are the IP addresses of the network side devices.
  • the next hop of the second primary route is the third PE device.
  • the next hop of the second standby route is the second PE device.
  • the first PE device is further configured to receive the second forward service data from the user side device through the second OVPN. If the second OTN pipe is in a normal state, the first PE device is further configured to send the second forward service data to the network side device through the second main route.
  • the first PE device is further configured to send the second forward service data to the network side device through the second standby route.
  • the first PE device can implement data offloading through the second (optical virtual private network, OVPN). Therefore, the present application can improve communication efficiency.
  • the second aspect of the present application provides a dual-homing protection method.
  • the dual-homing protection method can be applied to the first PE device.
  • the dual-homing protection method includes the following steps: the first PE device receives the first forward service data from the user side device.
  • a first OTN pipe is established between the first PE device and the second PE device.
  • a second OTN pipe is established between the first PE device and the third PE device.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • the first PE device is configured with a first primary route and a first backup route.
  • the destination addresses of the first primary route and the first backup route are the IP addresses of the network side devices.
  • the next hop of the first main route is the second PE device.
  • the next hop of the first standby route is the third PE device. If the first OTN pipe is in a normal state, the first PE device sends the first forward service data to the network side device through the first main route. If the first OTN pipe is in an abnormal state, the first PE device sends the first forward service data to the network side device through the first standby route.
  • the first PE device sends the first forward service data to the network side device through the first main route. If the first OTN pipe or the second channel is in an abnormal state, the first PE device is configured to send the first forward service data to the network side device through the first standby route.
  • the first PE device receives the first detection data from the second PE device.
  • the first PE device confirms whether the second channel is in a normal state according to the first detection data.
  • the dual-homing protection method further includes the following steps: the first PE device receives information about the first primary route from the second PE device.
  • the first PE device receives information about the first backup route from the third PE device.
  • the first PE device detects whether the first OTN pipe is in a normal state through an OTN pipe state detection technology.
  • the first PE device receives the first forward service data from the user side device through the first OVPN.
  • the first PE device is also configured with a second primary route and a second backup route.
  • the destination addresses of the second primary route and the second standby route are the IP addresses of the network side devices.
  • the next hop of the second primary route is the third PE device.
  • the next hop of the second standby route is the second PE device.
  • the dual-homing protection method further includes the following steps: the first PE device receives the second forward service data from the user-side device through the second OVPN. If the second OTN pipe is in a normal state, the first PE device sends the second forward service data to the network side device through the second main route. If the second OTN pipe is in an abnormal state, the first PE device sends the second forward service data to the network side device through the second standby route.
  • the third aspect of the present application provides a dual-homing protection method.
  • the dual-homing protection method can be applied to the second PE device.
  • the dual-homing protection method includes the following steps: the second PE device receives the first forward service data from the first PE device.
  • a third OTN pipe is established between the second PE device and the third PE device.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • the second PE device is configured with a second forward primary route and a second forward standby route.
  • the destination address of the second forward primary route and the second forward standby route is the IP address of the network side device.
  • the next hop of the second forward main route is the network side device.
  • the next hop of the second forward standby route is the third PE device.
  • the second PE device sends the first forward service data to the network side device through the second forward main route. If the second channel is in an abnormal state, the second PE device sends the first forward service data to the network side device through the second forward backup route.
  • the first OTN pipe is established between the first PE device and the second PE device.
  • the first PE device and the third PE device establish a second OTN pipe.
  • a first channel is established between the first PE device and the user-side device.
  • the second PE device is configured with a second reverse main route and a second reverse backup route.
  • the destination address of the second reverse main route and the second reverse standby route is the IP address of the user-side device.
  • the next hop of the second reverse primary route is the first PE device.
  • the next hop of the second forward standby route is the third PE device.
  • the dual-homing protection method further includes the following steps: the second PE device receives reverse service data from the network side device.
  • the second PE device sends reverse service data to the user side device through the second reverse main route. If the first OTN pipe is in an abnormal state, the second PE device sends reverse service data to the user side device through the second reverse backup route.
  • the second PE device is further configured to detect whether the first OTN pipe is in a normal state by using an OTN pipe state detection technology.
  • the dual-homing protection method further includes the following step: the second PE device receives information of the second reverse primary route from the first PE device.
  • the second PE device receives the information of the second forward backup route from the third PE device.
  • the fourth aspect of the present application provides a dual-homing protection device.
  • the dual-homing protection device includes a receiving module and a sending module.
  • the receiving module is used for receiving the first forward service data from the user side equipment.
  • a first OTN pipe is established between the dual-homing protection device and the second PE equipment.
  • a second OTN pipeline is established between the dual-homing protection device and the third PE equipment.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • the sending module is configured with a first primary route and a first backup route.
  • the destination addresses of the first primary route and the first backup route are the Internet Protocol IP addresses of the network side equipment.
  • the next hop of the first main route is the second PE device.
  • the next hop of the first standby route is the third PE device.
  • the sending module is configured to send the first forward service data to the network side device through the first main route if the first OTN pipe is in a normal state.
  • the sending module is further configured to send the first forward service data to the network side device through the first standby route if the first OTN pipe is in an abnormal state.
  • the receiving module is further configured to receive the information of the first primary route from the second PE device.
  • the receiving module is also used to receive the information of the first backup route from the third PE device.
  • the dual-homing protection device further includes a detection module.
  • the detection module is used to detect whether the first OTN pipe is in a normal state through the OTN pipe state detection technology.
  • the receiving module is configured to receive the first forward service data from the user-side device through the first OVPN.
  • the sending module is also configured with a second main route and a second backup route.
  • the destination addresses of the second primary route and the second standby route are the IP addresses of the network side devices.
  • the next hop of the second primary route is the third PE device.
  • the next hop of the second standby route is the second PE device.
  • the receiving module is further configured to receive the second forward service data from the user side equipment through the second OVPN.
  • the sending module is further configured to send the second forward service data to the network side device through the second main route if the second OTN pipe is in a normal state.
  • the sending module is further configured to send the second forward service data to the network side device through the second backup route if the second OTN pipe is in an abnormal state.
  • the sending module is configured to send the first forward service data to the network side device through the first main route if the first OTN pipe and the second channel are in a normal state.
  • the sending module is configured to send the first forward service data to the network side device through the first backup route if the first OTN pipe or the second channel is in an abnormal state.
  • the receiving module is further configured to receive the first detection data from the second PE device.
  • the dual-homing protection device also includes a processing module. The processing module is used to confirm whether the second channel is in a normal state according to the first detection data.
  • the fifth aspect of the present application provides a dual-homing protection device.
  • the dual-homing protection device includes a receiving module and a sending module.
  • the receiving module is used to receive the first forward service data from the first PE device.
  • a third OTN pipeline is established between the dual-homing protection device and the third PE equipment.
  • a second channel is established between the dual-homing protection device and the network-side device.
  • a third channel is established between the third PE device and the network side device.
  • the sending module is configured with a second forward primary route and a second forward standby route.
  • the destination address of the second forward primary route and the second forward standby route is the IP address of the network side device.
  • the next hop of the second forward main route is the network side device.
  • the next hop of the second forward standby route is the third PE device.
  • the sending module is configured to send the first forward service data to the network side device through the second forward main route if the second channel is in a normal state.
  • the sending module is further configured to send the first forward service data to the network side device through the second forward standby route if the second channel is in an abnormal state.
  • a first OTN pipe is established between the first PE device and the dual-homing protection device.
  • the first PE device and the third PE device establish a second OTN pipe.
  • a first channel is established between the first PE device and the user-side device; the sending module is also configured with a second reverse main route and a second reverse backup route.
  • the destination address of the second reverse main route and the second reverse standby route is the IP address of the user-side device.
  • the next hop of the second reverse primary route is the first PE device.
  • the next hop of the second forward standby route is the third PE device.
  • the receiving module is also used for receiving reverse service data from the network side equipment.
  • the sending module is further configured to send the reverse service data to the user-side device through the second reverse main route if the first OTN pipe is in a normal state.
  • the sending module is further configured to send the reverse service data to the user-side device through the second reverse backup route if the first OTN pipe is in an abnormal state.
  • the dual-homing protection device further includes a detection module.
  • the detection module is used to detect whether the first OTN pipe is in a normal state through the OTN pipe state detection technology.
  • the receiving module is further configured to receive information of the second reverse primary route from the first PE device.
  • the receiving module is further configured to receive the information of the second forward backup route from the third PE device.
  • the sixth aspect of the present application provides a first PE device.
  • the first PE device includes memory and a transceiver.
  • the transceiver is used for receiving the first forward service data from the user side equipment.
  • a first optical transport network OTN pipe is established between the first PE device and the second service provider edge PE device.
  • a second OTN pipe is established between the first PE device and the third PE device.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • the first primary route and the first standby route are stored in the memory.
  • the destination addresses of the first primary route and the first backup route are the Internet Protocol IP addresses of the network side equipment.
  • the next hop of the first main route is the second PE device.
  • the next hop of the first standby route is the third PE device.
  • the transceiver is further configured to send the first forward service data to the network side device through the first main route if the first OTN pipe is in a normal state.
  • the transceiver is further configured to send the first forward service data to the network side device through the first standby route if the first OTN pipe is in an abnormal state.
  • the first PE device may further include a processor.
  • the transceiver or the processor of the first PE device is further configured to execute the method in the foregoing second aspect or any optional manner of the second aspect.
  • the seventh aspect of the present application provides a second PE device.
  • the second PE device includes memory and a transceiver.
  • the transceiver is used to receive first forward service data from the first PE device.
  • a third OTN pipe is established between the second PE device and the third PE device.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • a second forward primary route and a second forward standby route are stored in the memory.
  • the destination address of the second forward primary route and the second forward standby route is the IP address of the network side device.
  • the next hop of the second forward main route is the network side device.
  • the next hop of the second forward standby route is the third PE device.
  • the transceiver is further configured to send the first forward service data to the network side device through the second forward main route if the second channel is in a normal state.
  • the transceiver is further configured to send the first forward service data to the network side device through the second forward standby route if the second channel is in an abnormal state.
  • the first PE device may further include a processor.
  • the transceiver or the processor of the first PE device is further configured to execute the method in the foregoing third aspect or any optional manner of the third aspect.
  • the eighth aspect of the present application provides a computer storage medium, which is characterized in that instructions are stored in the computer storage medium, and when the instructions are executed on the computer, the computer executes the method according to the second aspect or any implementation manner of the second aspect ; or causing the computer to execute the third aspect or the method of any one implementation manner of the third aspect.
  • the ninth aspect of the present application provides a computer program product, which is characterized in that, when the computer program product is executed on a computer, it causes the computer to execute the method according to the second aspect or any implementation manner of the second aspect; or causes the computer to execute the method such as The third aspect or the method of any implementation manner of the third aspect.
  • FIG. 1 is a schematic structural diagram of an optical communication system using OTN technology
  • Fig. 2 is the first schematic structural diagram of the dual-homing protection system provided in this application;
  • FIG. 3 is a schematic structural diagram of an extended PCEP message provided in this application.
  • FIG. 4 is a second structural schematic diagram of the dual-homing protection system provided in this application.
  • FIG. 5 is a third structural schematic diagram of the dual-homing protection system provided in this application.
  • FIG. 6 is a fourth structural schematic diagram of the dual-homing protection system provided in this application.
  • Figure 7 is a schematic flow diagram of the dual-homing protection method provided in the present application.
  • Figure 8 is a schematic structural diagram of the dual-homing protection device provided in this application.
  • FIG. 9 is a schematic structural diagram of a computer device provided in this application.
  • the present application provides a dual-homing protection system, a dual-homing protection method, and related equipment, by establishing different optical transport network (optical transport network, OTN) pipelines for the first service provider edge (provider edge, PE) equipment, which can Improve system reliability.
  • OTN optical transport network
  • PE provider edge
  • the dual-homing protection method in this application can be applied to optical communication systems in the field of optical communication.
  • the optical communication system in FIG. 1 if the OTN pipe fails, normal communication between the user-side device 101 and the network-side device 104 will be affected.
  • Fig. 2 is a schematic diagram of the first structure of the dual-homing protection system provided in this application.
  • the dual-homing protection system includes a user-side device 200 , a first PE device 201 , a second PE device 202 , a third PE device 203 and a network-side device 204 .
  • the user-side device 200 may be an optical network terminal (optical network terminal, ONT), an optical line terminal (optica line terminal, OLT), or a router.
  • the user-side device 200 is in the first network domain. In the first network domain, the user-side device 200 may be connected to the user equipment.
  • the user equipment may be a mobile phone or a tablet computer.
  • the user equipment can also be a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, or a smart grid. Wireless terminals in smart cities, wireless terminals in smart homes, wireless terminals in smart homes, vehicle-mounted terminals, etc.
  • the network side device 204 may be a router or an application server or the like.
  • the network side device 204 is in the second network domain.
  • the first network domain and the second network domain may be Internet protocol (internet protocol, IP) networks.
  • IP Internet protocol
  • the user-side device 200 and the first PE device 201 establish a first channel.
  • the first channel can be obtained through IP static routing configuration.
  • the destination address of the forward service data is the IP address of the network-side device 204
  • the user-side device 200 is configured to send the forward service data to the first PE device 201 through the first channel.
  • the destination address of the received reverse service data is the IP address of the user-side device 200
  • the first PE device 201 is configured to send the reverse service data to the user-side device 200 through the first channel.
  • the data sent by the user-side device 200 to the network-side device 204 is called forward service data.
  • the data sent by the network-side device 204 to the user-side device 200 is called reverse service data.
  • the network side device 204 and the second PE device 202 establish a second channel.
  • the network side device 204 and the third PE device 203 establish a third channel.
  • the second channel and the third channel can be obtained through IP static routing configuration.
  • the network-side device 204 is configured to send the reverse service data to the user-side device 200 through the second channel or the third channel.
  • the second PE device 202 is configured to send the forward service data to the network-side device 204 through the second channel.
  • the third PE device 203 is configured to send the forward service data to the network side device 204 through the third channel.
  • the first PE device 201, the second PE device 202, and the third PE device 203 are in the transport network.
  • the transport network is an optical transport network (OTN).
  • OTN optical transport network
  • the first PE device 201, the second PE device 202, and the third PE device 203 are OTN devices.
  • a one-hop direct first OTN pipe is established between port 1 of the first PE device 201 and port 3 of the second PE device 202 .
  • a one-hop direct second OTN pipe is established between port 2 of the first PE device 201 and port 4 of the third PE device 203 .
  • the second PE device 202 and the third PE device 203 are active and standby nodes for each other.
  • the second PE device 202 is the master node.
  • the third PE device 203 is a standby node.
  • the first PE device 201 , the second PE device 202 and the third PE device 203 are also referred to as network nodes or nodes.
  • OTN pipes are also called links or channels.
  • the optical transport network may be an automatically switched optical network (ASON) using a generalized multi protocol label switching technology (generalized multi protocol label switching, GMPLS).
  • ASON can establish the first OTN pipe and the second OTN pipe through resource reservation protocol traffic engineering (resource reservation protocol traffic engineering, RSVP-TE). Take the establishment of the first OTN pipe as an example.
  • ASON can also include network management equipment.
  • the network management device may be an intelligent network management (network cloud engine, NCE) or a path computation element (path computation element, PCE). When the network management device is a PCE, the PCE may be a software program in the first PE device 201 , the second PE device 202 and the third PE device 203 .
  • the network management device is configured to issue a command for creating an OTN pipe to the first PE device 201 .
  • the first PE device 201 is used to obtain information about other nodes in the entire network through an open shortest path first (open shortest path first, OSPF) protocol.
  • the information of other nodes includes node data and link data.
  • the first PE device 201 is configured to calculate a service path from the first PE device 201 to the second PE device 202 through a constraint-based shortest path first algorithm (Constrained Shortest Path First, CSPF). Afterwards, the first PE device 201 is used to establish a first OTN pipe between the first PE device 201 and the second PE device 202 through RSVP-TE.
  • CSPF Consstrained Shortest Path First
  • the first PE device 201 is configured with a first primary route and a first backup route at the IP layer.
  • the first primary route and the first backup route may be routing and forwarding tables in the first PE device 201 .
  • the destination address of the first primary route and the first backup route is the IP address of the network side device 204 .
  • the next hop of the first main route is the second PE device 202 .
  • the first main route corresponds to the first OTN pipe.
  • the outbound interface of the first primary route is port 1 of the first PE device 201 .
  • the next hop of the first standby route is the third PE device 203 .
  • the first standby route corresponds to the second OTN pipe.
  • the outbound interface of the first backup route is port 2 of the first PE device 201 .
  • FIG. 3 is a schematic structural diagram of an extended PCEP message provided in this application.
  • the extended PCEP message 301 includes nine fields. The nine fields are destination IP address, IP prefix list, flag, S, R, next hop IP, next hop MAC, node role and associated node.
  • the destination IP address field is the destination address of the route.
  • the IP prefix list field is the length of consecutive bits of 1 in the mask of the destination IP address.
  • the flag field is a reserved flag bit.
  • the S field identifies the routing flag on the server side. Setting the S field to 1 indicates forward service data routing. Setting the S field to 0 indicates the route of the reverse service data.
  • the R field identifies the remove flag. Setting the R field to 1 means deleting routing information, and setting the R field to 0 means adding routing information.
  • the next hop IP field indicates the IP address of the next hop.
  • the next hop MAC field indicates the MAC address of the next hop.
  • the node role field indicates the role of the next hop. The role of the next hop can be the active node or the standby node.
  • the associated node field indicates the node that is active and standby with the next hop.
  • the PCE When configuring a route for the first PE device 201 through the extended PCEP protocol, the PCE obtains two extended PCEP packets according to the active/standby relationship between the second PE device 202 and the third PE device 203 .
  • the PCE sends the two extended PCEP packets to the second PE device 202 and the third PE device 203 respectively.
  • the two extended PCEP packets are PCEP packet 1 and PCEP packet 2 respectively.
  • the second PE device 202 receives the PCEP packet 1
  • the second PE device 202 sends the PCEP packet 1 to the first PE device 201 .
  • the third PE device 203 receives the PCEP packet 2
  • the third PE device 203 sends the PCEP packet 2 to the first PE device 201 .
  • the destination IP address field is the destination address of the forward service data, that is, the IP address of the network side device 204 .
  • the S field and R field in PCEP message 1 and PCEP message 2 are set to 1.
  • the next hop IP field in the PCEP message 1 is the IP address of the second PE device 202 .
  • the next-hop IP field in the PCEP packet 2 is the IP address of the third PE device 203 .
  • the next-hop MAC field in the PCEP message 1 is the MAC address of the second PE device 202 .
  • the next-hop MAC field in the PCEP message 2 is the MAC address of the third PE device 203 .
  • the node role field in PCEP message 1 is the master node.
  • the node role field in PCEP message 2 is the standby node.
  • the first PE device 201 may agree with the second PE device 202 on the representation manner of the primary node or the standby node. For example, 1 indicates the active node, and 0 indicates the standby node.
  • the associated node field in the PCEP message 1 is the identifier of the third PE device 203 .
  • the identifier of the third PE device 203 may be the IP address of the third PE device 203 .
  • the associated node field in the PCEP packet 2 is the identifier of the second PE device 202 .
  • the identifier of the second PE device 202 may be the IP address of the second PE device 202 .
  • PCEP message 1 and PCEP message 2 can be transmitted through OTN control overhead.
  • the OTN control overhead can be general communication channel overhead 1 (general communication1, GCC1), GCC2 or GCC0.
  • the first PE device 201 receives the PCEP packet 1 from the second PE device 202 .
  • the first PE device 201 receives the PCEP packet 2 from the third PE device 203 .
  • the first PE device 201 obtains the first primary route and the first backup route according to the PCEP message 1 and the PCEP message 2 .
  • PCEP packet 1 carries information of the first primary route.
  • PCEP packet 2 carries information about the first backup route.
  • the first primary route and the first backup route are also called the primary/standby route protection group.
  • the first PE device 201 configures the active/standby route protection group on the forwarding plane to form a three-layer active/standby route protection.
  • the first PE device 201 After configuring the first primary route and the first backup route, the first PE device 201 receives the first forward service data from the user-side device 200 .
  • the source address of the first forward service data is the IP address of the user-side device 200 .
  • the destination address of the first forward service data is the IP address of the network side device 204 .
  • the first PE device 201 If the first OTN pipe is in a normal state, the first PE device 201 is configured to send the first forward service data to the network side device 204 through the first main route.
  • the next hop of the first main route is the second PE device 202 .
  • the second PE device 202 is configured to receive the first forward service data through the first OTN pipe.
  • the second PE device 202 is configured to send the first forward service data to the network side device 204 through the second channel.
  • the first PE device 201 is used to send the first forward service data to the network side device 204 through the first standby route.
  • the next hop of the first standby route is the third PE device 203 .
  • the third PE device 203 is configured to receive the first forward service data through the second OTN pipe.
  • the third PE device 203 is configured to send the first forward service data to the network side device 204 through the third channel.
  • the first PE device 201 may determine whether the first OTN pipe is in a normal state through bidirectional forwarding detection (bidirectional forwarding detection, BFD). Specifically, a first stage of BFD protocol detection is configured between the first PE device 201 and the second PE device 202 . After a fault occurs on the first OTN pipe, such as a fiber break, the first PE device 201 and the second PE device 202 can quickly detect the fault through the BFD protocol. The first PE device 201 determines that the first OTN pipe is in an abnormal state.
  • BFD bidirectional forwarding detection
  • the first PE device 201 may send the first forward service data to the network side device 204 through the first main route when both the first OTN pipe and the second channel are in a normal state.
  • the first PE device 201 determines whether the second channel is in a normal state according to the detection data sent by the second PE device 202 .
  • a second stage of BFD protocol detection is configured between the second PE device 202 and the network side device 204 . After a failure occurs on the second channel, the network side device 204 and the second PE device 202 can quickly detect the failure through the BFD protocol.
  • the second PE device 202 obtains the first detection data according to the BFD protocol, and sends the first detection data to the first PE device 201 .
  • the first PE device 201 determines whether the second channel is in a normal state according to the first detection data.
  • a third stage of BFD protocol detection may be configured between the first PE device 201 and the third PE device 203 .
  • a fourth stage of BFD protocol detection is configured between the third PE device 203 and the network side device 204 .
  • the first PE device 201 may determine whether the second OTN pipe is in a normal state according to the third stage of the BFD protocol detection.
  • the second PE device 202 can detect and determine whether the third channel is in a normal state according to the fourth segment of the BFD protocol. When both the first transmission link and the second transmission link are in an abnormal state, the first PE device 201 may generate an alarm.
  • the network side device 204 may determine whether the second channel is in a normal state according to the second stage of BFD protocol detection. If the second channel is in a normal state, the network side device 204 may send reverse service data to the second PE device 202 through the second channel. If the second channel is in an abnormal state, the network side device 204 may send reverse service data to the third PE device 203 through the third channel. Alternatively, the network side device 204 determines whether the third channel is in a normal state according to the fourth segment of the BFD protocol detection. If the third channel is in a normal state, the network side device 204 may send reverse service data to the third PE device 203 through the third channel. If the second channel is in an abnormal state, the network side device 204 may send reverse service data to the second PE device 202 through the second channel.
  • the first PE device 201 may transmit service data through the second OTN pipe. Therefore, by establishing different OTN pipes for the first PE device 201, system reliability can be improved.
  • the BFD protocol is a three-layer detection technology.
  • the first PE device 201 needs to interpret the BFD protocol packet at the IP layer. Therefore, the BFD protocol requires more physical resources.
  • the first PE device 201 may determine whether the first OTN pipe is in a normal state through an OTN pipe state detection technology. At this time, the first PE device 201 detects the status of the first OTN pipe at the physical layer, thereby saving physical resources.
  • the first OTN pipe or the second OTN pipe may be a Liquid OTN pipe.
  • Liquid OTN pipes are also called optical service container (optical service unit, OSU) pipes.
  • OSU optical service unit
  • Liquid OTN pipeline is a pipeline that adopts Liquid OTN technology.
  • Liquid OTN technology introduces a service-oriented OSU.
  • Liquid OTN technology optimizes and adds a new layer of OSU particles on the traditional OTN mechanism.
  • the NCE can create the first optical virtual private network (optical virtual private network, OVPN).
  • the first OVPN includes a first PE device 201 , a second PE device 202 and a third PE device 203 .
  • the first PE device 201 is connected to the user-side device 200 through a first port.
  • One end of the first channel is the first port of the first PE device 201 .
  • the second PE device 202 is connected to the network side device 204 through a second port.
  • One end of the second channel is the second port of the second PE device 202 .
  • the third PE device 203 is connected to the network side device 204 through a third port.
  • the third channel is the third port of the third PE device 203 .
  • the first OVPN also includes a first port, a second port and a third port.
  • the first OVPN also includes a first OTN pipe and a second OTN pipe.
  • the first PE device 201 receives the first forward service data through the first OVPN.
  • the first forward service data reaches the network side device 204 after passing through the first OVPN.
  • the reverse service data reaches the user-side device 200 after passing through the first OVPN.
  • Different service data may come from different user-side devices, and ultimately access the same network-side device.
  • different service data include different source addresses and the same destination address.
  • another PE device is connected to another user-side device through a connection port.
  • Two OTN pipes are established between another PE device and the two PE devices. There is a one-to-one correspondence between two OTN pipes and two PE devices.
  • the two PE devices are the second PE device 202 and the third PE device 203 respectively.
  • NCE can create another OVPN.
  • Another OVPN includes another PE device, a second PE device 202 and a third PE device 203 .
  • Another OVPN also includes a connection port, a second port and a third port.
  • Another OVPN also includes two OTN pipes.
  • Different service data may come from the same user-side device, and finally access different network-side devices.
  • different service data include the same source address and different destination addresses.
  • the two PE devices respectively establish two OTN pipes with the first PE device 201 .
  • NCE can create another OVPN.
  • Another OVPN includes the first PE device 201 and two PE devices.
  • Another OVPN also includes a first port and two connection ports.
  • Another OVPN network also includes two OTN pipes.
  • Different business data may come from the same user-side device, and finally access the same network-side device.
  • different service data include the same source address and the same destination address.
  • the first PE device 201 is also connected to the user-side device 200 through the fourth port.
  • the second PE device 202 is also connected to the network side device 204 through the fifth port.
  • the third PE device 203 is also connected to the network side device 204 through the sixth port.
  • NCE creates a second OVPN.
  • the second OVPN includes a first PE device 201 , a second PE device 202 and a third PE device 203 .
  • the second OVPN also includes a fourth port, a fifth port and a sixth port.
  • the second OVPN also includes the first OTN pipe and the second OTN pipe.
  • the first PE device 201 receives the second forward service data through the second OVPN.
  • the source addresses of the second forward service data and the first forward service data are the same.
  • the destination addresses of the second forward service data and the first forward service data are the same.
  • the first PE device 201 also includes a second primary route and a second backup route.
  • the destination address of the second primary route and the second standby route is the IP address of the network side device 204 .
  • the next hop of the second main route is the third PE device 203 .
  • the next hop of the second standby route is the second PE device 202 .
  • the first PE device 201 sends the second forward service data to the network side device 204 through the second main route. If the second OTN pipe is in an abnormal state, the first PE device 201 sends the second forward service data to the network side device 204 through the second standby route.
  • FIG. 4 is a second structural schematic diagram of the dual-homing protection system provided in this application.
  • a channel is established between the second PE device 202 and the third PE device 203 .
  • a third OTN pipe through the first hop is established between port 5 of the second PE device 202 and port 6 of the third PE device 203 .
  • the first PE device 201 is configured to send the first forward service data to the second PE device 202 through the first main route.
  • the second PE device 202 is configured with a second forward primary route and a second forward standby route.
  • the destination address of the second forward primary route and the second forward standby route is the IP address of the network side device 204 .
  • the next hop of the second forward main route is the network side device 204 .
  • the next hop of the second forward standby route is the third PE device 203 .
  • the second PE device 202 After receiving the first forward service data, if the second channel is in a normal state, the second PE device 202 is configured to send the first forward service data to the network side device 204 through the second forward main route. If the second channel is in an abnormal state, the second PE device 202 is configured to send the first forward service data to the network side device 204 through the second forward standby route.
  • the first PE device 201 is configured to send the first forward service data to the third PE device 203 through the first standby route.
  • the third PE device 203 may be configured with a third forward primary route and a third forward standby route.
  • the destination address of the third forward primary route and the third forward standby route is the IP address of the network side device 204 .
  • the next hop of the third forward main route is the network side device 204 .
  • the next hop of the third forward standby route is the second PE device 202 .
  • the third PE device 203 After receiving the first forward service data, if the third channel is in a normal state, the third PE device 203 is configured to send the first forward service data to the network side device 204 through the third forward main route. If the third channel is in an abnormal state, the third PE device 203 is configured to send the first forward service data to the network side device 204 through the third forward standby route.
  • the second PE device 202 may also be configured with a second reverse primary route and a second reverse backup route.
  • the destination addresses of the second reverse main route and the second reverse backup route are the IP address of the user-side device 200 .
  • the next hop of the second reverse main route is the first PE device 201 .
  • the next hop of the second reverse standby route is the third PE device 203 .
  • the second PE device 202 if the second channel is in a normal state, the second PE device 202 is configured to receive reverse service data from the network side device 204 .
  • the destination address of the reverse service data is the IP address of the user-side device 200 .
  • the second PE device After receiving the reverse service data, if the first OTN pipe is in a normal state, the second PE device is configured to send the reverse service data to the user side device 200 through the second reverse main route. If the first OTN pipe is in an abnormal state, the second PE device 202 is configured to send reverse service data to the user side device 200 through the second reverse standby route.
  • the third PE device 203 may also be configured with a third reverse primary route and a third reverse backup route.
  • the destination addresses of the third reverse primary route and the third forward standby route are the IP address of the user-side device 200 .
  • the next hop of the third reverse main route is the first PE device 201 .
  • the next hop of the third reverse standby route is the second PE device 202 .
  • the third PE device 203 if the second channel is in an abnormal state, the third PE device 203 is used to receive reverse service data from the network side device 204 . After receiving the reverse service data, if the second OTN pipe is in a normal state, the third PE device is configured to send the reverse service data to the user side device 200 through the third reverse main route. If the second OTN pipe is in an abnormal state, the second PE device 202 is configured to send reverse service data to the user side device 200 through the third reverse standby route.
  • the dual-homing protection system in FIG. 4 has a similar structure to the dual-homing protection system in FIG. 2 . Therefore, for the description in FIG. 4 , reference may be made to the description in FIG. 2 above.
  • the second PE device 202 may obtain the second reverse primary route and the second reverse backup route by extending the PCEP protocol.
  • the second PE device 202 is configured to receive the PCEP packet 3 from the first PE device 201 .
  • the second PE device 202 is configured to receive the PCEP packet 4 from the third PE device 203 .
  • the second PE device 202 obtains the second reverse primary route and the second reverse backup route according to the PCEP message 3 and the PCEP message 4 .
  • the PCEP packet 3 carries information of the second reverse main route.
  • PCEP packet 4 carries information about the second reverse backup route.
  • the formats of the PCEP message 3 and the PCEP message 4 reference may be made to the relevant description of the aforementioned PCEP message 1 and the PCEP message 2 .
  • the third PE device 203 can obtain the third reverse main route and the third reverse backup route by extending the PCEP protocol.
  • the third PE device 203 is configured to receive the PCEP packet 5 from the first PE device 201 .
  • the third PE device 203 is configured to receive the PCEP packet 6 from the second PE device 202 .
  • the third PE device 203 obtains the third reverse primary route and the third reverse backup route according to the PCEP message 5 and the PCEP message 6 .
  • the PCEP packet 5 carries information of the third reverse primary route.
  • PCEP packet 6 carries information of the third reverse standby route.
  • the formats of the PCEP message 5 and the PCEP message 6 reference may be made to the relevant description of the aforementioned PCEP message 1 and the PCEP message 2 .
  • FIG. 5 is a third structural schematic diagram of the dual-homing protection system provided in this application.
  • the dual-homing protection system further includes another user-side device 501 and another PE device 502 .
  • Another PE device 502 is connected to another user-side device 501 through a connection port.
  • Another PE device 502 establishes two OTN pipes with the two PE devices. There is a one-to-one correspondence between two OTN pipes and two PE devices.
  • the two PE devices are the second PE device 202 and the third PE device 203 respectively.
  • the dual-homing protection system further includes another network-side device 505 and two PE devices.
  • the two PE devices are PE device 503 and PE device 504 .
  • Another network side device 505 is respectively connected to the two connection ports of the two PE devices.
  • the two PE devices respectively establish two OTN pipes with the first PE device 201 . There is a one-to-one correspondence between two OTN pipes and two PE devices.
  • a dual-homing protection system also includes NCE.
  • the NCE is used to create the first OVPN according to the aforementioned method.
  • the first OVPN also includes a tunnel between the second PE device 202 and the third PE device 203 .
  • NCE can also be used to create another OVPN and/or a second OVPN.
  • the second OVPN also includes a tunnel between the second PE device 202 and the third PE device 203 .
  • the other OVPN also includes a tunnel between the second PE device 202 and the third PE device 203 .
  • another OVPN network includes two PE devices connected to the network side device 204
  • the other OVPN network also includes a tunnel between the two PE devices.
  • the second PE device 202 determines whether the second channel is in a normal state through the second stage of BFD protocol detection.
  • the third PE device 203 determines whether the third channel is in a normal state through the fourth segment of BFD protocol detection.
  • the second PE device 202 determines whether the first OTN pipe is in a normal state through the first segment of the BFD protocol detection.
  • the third PE device 203 determines whether the second OTN pipe is in a normal state through the third-stage BFD protocol detection.
  • FIG. 6 is a fourth structural schematic diagram of the dual-homing protection system provided in this application.
  • the first PE device 201 includes a first sub-PE device 601 and a second sub-PE device 602 .
  • the second PE device 202 establishes a first OTN pipe with the first sub-PE device 601 .
  • a second OTN pipe is established between the third PE device 203 and the second sub-PE device 602 .
  • a channel is also established between the first sub-PE device 601 and the second sub-PE device 602 .
  • port 7 of the first sub-PE device 601 and port 8 of the second sub-PE device 602 establish a fourth OTN pipe through the first hop.
  • the first channel includes a first sub-channel and a second sub-channel.
  • the first sub-PE device 601 and the user-side device 200 have established a first sub-channel.
  • a second sub-channel is established between the second sub-PE device 602 and the user-side device 200 .
  • the user-side device 200 may send the first forward service data to the first sub-PE device 601 through the first sub-channel.
  • the first sub-PE device 601 is configured with a fourth forward primary route and a fourth forward standby route.
  • the destination address of the fourth forward primary route and the fourth forward standby route is the IP address of the network side device 204 .
  • the next hop of the fourth forward main route is the second PE device 202 .
  • the next hop of the fourth forward backup route is the second sub-PE device 602 .
  • the first sub-PE device 601 After receiving the first forward service data, if the first OTN pipe is in a normal state, the first sub-PE device 601 is configured to send the first forward service data to the network side device 204 through the fourth forward main route. If the first OTN pipe is in an abnormal state, the first sub-PE device 601 is configured to send the first forward service data to the network side device 204 through the fourth forward standby route.
  • the user-side device 200 may send the first forward service data to the second sub-PE device 602 through the second sub-channel.
  • the second sub-PE device 602 is configured with a fifth forward primary route and a fifth forward standby route.
  • the destination address of the fifth forward primary route and the fifth forward standby route is the IP address of the network side device 204 .
  • the next hop of the fifth forward main route is the third PE device 203 .
  • the next hop of the fifth forward standby route is the first sub-PE device 601 .
  • the second sub-PE device 602 After receiving the first forward service data, if the second OTN pipe is in a normal state, the second sub-PE device 602 is configured to send the first forward service data to the network side device 204 through the fifth forward main route.
  • the second sub-PE device 602 is configured to send the first forward service data to the network side device 204 through the fifth forward standby route.
  • the fourth forward main route is also referred to as the first main route.
  • the fifth forward primary route is also called the first backup route.
  • the next hop of the second reverse primary route of the second PE device 202 is the first sub-PE device 601 .
  • the next hop of the second reverse backup route is the third PE device 203 .
  • the second PE device 202 if the second channel is in a normal state, the second PE device 202 is configured to receive reverse service data from the network side device 204 . After receiving the reverse service data, if the first OTN pipe is in a normal state, the second PE device is configured to send the reverse service data to the user side device 200 through the second reverse main route. If the first OTN pipe is in an abnormal state, the second PE device 202 is configured to send reverse service data to the user side device 200 through the second reverse standby route.
  • the next hop of the third reverse primary route of the third PE device 203 is the second sub-PE device 602 .
  • the next hop of the third reverse standby route is the second PE device 202 .
  • the third PE device 203 if the second channel is in an abnormal state, the third PE device 203 is used to receive reverse service data from the network side device 204 . After receiving the reverse service data, if the second OTN pipe is in a normal state, the third PE device is configured to send the reverse service data to the user side device 200 through the third reverse main route. If the second OTN pipe is in an abnormal state, the second PE device 202 is configured to send reverse service data to the user side device 200 through the third reverse standby route.
  • the first sub-PE device 601 may also be configured with a fourth reverse primary route and a fourth reverse backup route.
  • the destination addresses of the fourth reverse main route and the fourth reverse backup route are the IP address of the user-side device 200 .
  • the next hop of the fourth reverse main route is the user side device 200 .
  • the next hop of the fourth reverse standby route is the second sub-PE device 602 .
  • the first sub-PE device 601 After receiving the reverse service data, if the first sub-channel is in a normal state, the first sub-PE device 601 is configured to send the reverse service data to the user-side device 200 through the fourth reverse main route. If the first sub-channel is in an abnormal state, the first sub-PE device 601 is configured to send reverse service data to the user-side device 200 through the fourth reverse backup route.
  • the second sub-PE device 602 may also be configured with a fifth reverse primary route and a fifth reverse backup route.
  • the destination address of the fifth reverse main route and the fifth forward backup route is the IP address of the user-side device 200 .
  • the next hop of the fifth reverse main route is the user-side device 200 .
  • the next hop of the fifth reverse standby route is the first sub-PE device 601 .
  • the second sub-PE device 602 After receiving the reverse service data, if the second sub-channel is in a normal state, the second sub-PE device 602 is configured to send the reverse service data to the user-side device 200 through the fifth reverse main route. If the second sub-channel is in an abnormal state, the second sub-PE device 602 is configured to send reverse service data to the user-side device 200 through the fifth reverse backup route.
  • the dual-homing protection system in FIG. 6 has a similar structure to the dual-homing protection systems in FIGS. 2 , 4 and 5 . Therefore, for the description in FIG. 6 , reference may be made to the descriptions in FIG. 2 , FIG. 4 and FIG. 5 .
  • Fig. 7 is a schematic flowchart of the dual-homing protection method provided in this application. As shown in Figure 7, the dual-homing protection method includes the following steps.
  • the first PE device receives the first forward service data from the user-side device, a first OTN pipe is established between the first PE device and the second PE device, and the first OTN pipe is established between the first PE device and the third PE device.
  • a second OTN pipe is established.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • the source address of the first forward service data is the IP address of the user-side device.
  • the destination address of the first forward service data is the IP address of the network side device.
  • step 702 if the first OTN pipe is in a normal state, the first PE device sends the first forward service data to the network side device through the first main route, and the next hop of the first main route is the second PE device.
  • the destination address of the first main route is the IP address of the network side device.
  • step 703 if the first OTN pipe is in an abnormal state, the first PE device sends the first forward service data to the network side device through the first standby route.
  • the next hop of the second primary route is the third PE device.
  • the destination address of the first backup route is the IP address of the network side device.
  • the first PE device determines whether the first OTN pipe is in a normal state through the BFD protocol.
  • the first OTN pipe and the second OTN pipe are OSU pipes.
  • the first PE device obtains the first primary route and the first backup route by extending the PCEP protocol.
  • the first PE device receives the information of the first primary route from the second PE device.
  • the first PE device receives information about the first backup route from the third PE device.
  • FIG. 8 is a schematic structural diagram of a dual-homing protection device provided in this application.
  • a dual-homing protection device 800 includes a receiving module 801 and a sending module 802 .
  • the dual-homing protection device 800 may be the first PE device 201 in the aforementioned dual-homing protection system.
  • the receiving module 801 is configured to receive the first forward service data from the user side equipment.
  • the dual-homing protection device and the second PE equipment establish a first optical transport network OTN pipe.
  • a second OTN pipeline is established between the dual-homing protection device 800 and the third PE equipment.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • the sending module 802 is configured with a first primary route and a first backup route.
  • the destination addresses of the first primary route and the first backup route are the IP addresses of the network side devices.
  • the next hop of the first main route is the second PE device.
  • the next hop of the first standby route is the third PE device. If the first OTN pipe is in a normal state, the sending module 802 sends the first forward service data to the network side device through the first main route. The sending module 802 is further configured to send the first forward service data to the network side device through the first standby route if the first OTN pipe is in an abnormal state.
  • the dual-homing protection device 800 may also be the second PE device 202 in the aforementioned dual-homing protection system.
  • the receiving module 801 is configured to receive the first forward service data from the first PE device.
  • a third OTN pipeline is established between the dual-homing protection device and the third PE equipment.
  • a second channel is established between the dual-homing protection device and the network-side device.
  • a third channel is established between the third PE device and the network side device.
  • the sending module 802 is configured with a second forward primary route and a second forward standby route.
  • the destination address of the second forward primary route and the second forward standby route is the IP address of the network side device.
  • the next hop of the second forward main route is the network side device.
  • the next hop of the second forward standby route is the third PE device.
  • the sending module 802 is configured to send the first forward service data to the network side device through the second forward main route if the second channel is in a normal state.
  • the sending module 802 is further configured to send the first forward service data to the network side device through the second forward standby route if the second channel is in an abnormal state.
  • each module of the dual-homing protection device can also be used to perform all or part of the operations that can be performed by the first PE device 201 or the second PE device 202 in the aforementioned dual-homing protection system.
  • FIG. 9 is a schematic structural diagram of a computer device provided in this application.
  • the computer device 900 in this application may be the first PE device or the second PE device.
  • computer device 900 includes transceiver 902 and memory 903 .
  • the transceiver 902 may be a wireless radio frequency module or an optical fiber transceiver module.
  • Memory 903 may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory.
  • the non-volatile memory may be a read-only memory (read-only memory, ROM), a programmable read-only memory (programmable ROM, PROM), an erasable programmable read-only memory (erasable PROM, EPROM) and the like.
  • the volatile memory may be random access memory (RAM).
  • the transceiver 902 is used to receive the first forward service data from the user side device.
  • the first PE device and the second PE device establish a first OTN pipe.
  • a second OTN pipe is established between the first PE device and the third PE device.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • the first primary route and the first backup route are stored in the memory 903 .
  • the destination addresses of the first primary route and the first backup route are the IP addresses of the network side devices.
  • the next hop of the first main route is the second PE device.
  • the next hop of the first standby route is the third PE device.
  • the transceiver 902 is further configured to send the first forward service data to the network side device through the first main route if the first OTN pipe is in a normal state.
  • the transceiver 902 is further configured to send the first forward service data to the network side device through the first backup route if the first OTN pipe is in an abnormal state.
  • the transceiver 902 is configured to receive first forward service data from the first PE device.
  • a third OTN pipe is established between the second PE device and the third PE device.
  • a second channel is established between the second PE device and the network side device.
  • a third channel is established between the third PE device and the network side device.
  • the memory 903 stores the second forward primary route and the second forward standby route.
  • the destination address of the second forward primary route and the second forward standby route is the IP address of the network side device.
  • the next hop of the second forward main route is the network side device.
  • the next hop of the second forward standby route is the third PE device.
  • the transceiver 902 is further configured to send the first forward service data to the network side device through the second forward main route if the second channel is in a normal state.
  • the transceiver 902 is further configured to send the first forward service data to the network side device through the second forward standby route if the second channel is in an abnormal state.
  • the computer device 900 also includes a processor 901 .
  • the processor 901 may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP.
  • the processor 901 may further include a hardware chip or other general-purpose processors.
  • the aforementioned hardware chip may be an application specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • Computer programs executable by the processor 901 are stored in the memory 903 . When the processor 901 reads and executes the computer program, it can perform all or part of the operations that can be performed by the first PE device or the second PE device in the above-mentioned dual-homing protection system or dual-homing protection method.
  • the present application also provides a digital processing chip.
  • the digital processing chip integrates circuits and one or more interfaces for realizing the functions of the processor 901 described above.
  • the digital processing chip can complete all or part of the operations that can be performed by the first PE device or the second PE device in the aforementioned dual-homing protection system or dual-homing protection method.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un système de protection à double anneau appliqué à un système de communication optique. Le système de protection à double anneau comprend un premier dispositif PE, un second dispositif PE et un troisième dispositif PE. Une première canalisation OTN est établie entre le premier dispositif PE et le second dispositif PE. Une seconde canalisation OTN est établie entre le premier dispositif PE et le troisième dispositif PE. Un dispositif côté réseau est connecté séparément au second dispositif PE et au troisième dispositif PE. Le premier dispositif PE est configuré pour recevoir des premières données de service aller en provenance d'un réseau côté utilisateur. Si la première canalisation OTN se trouve dans un état normal, le premier dispositif PE est configuré pour envoyer les premières données de service aller au réseau côté réseau au moyen d'un premier routeur primaire. Sinon, le premier dispositif PE est configuré pour envoyer les premières données de service aller au réseau côté réseau au moyen d'un premier routeur secondaire. Un bond suivant du premier routeur primaire correspond au second dispositif PE. Un bond suivant du premier routeur secondaire correspond au troisième dispositif PE. Selon la présente invention, différentes canalisations OTN sont établies pour le premier dispositif PE, de telle sorte que la fiabilité du système peut être améliorée.
PCT/CN2022/111079 2021-08-30 2022-08-09 Système de protection à double anneau, procédé de protection à double anneau et dispositif associé WO2023029902A1 (fr)

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Citations (4)

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WO2015000173A1 (fr) * 2013-07-05 2015-01-08 华为技术有限公司 Procédé d'établissement de tunnel, procédé d'attribution d'étiquette, dispositif, et système de réseau
US20160380823A1 (en) * 2015-06-23 2016-12-29 Cisco Technology, Inc. Virtual private network forwarding and nexthop to transport mapping scheme
CN108668308A (zh) * 2017-03-30 2018-10-16 中国移动通信集团内蒙古有限公司 一种lte　ptn传送网及其静态路由保护方法
CN109474495A (zh) * 2018-12-07 2019-03-15 新华三技术有限公司 一种隧道检测方法及装置

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Publication number Priority date Publication date Assignee Title
WO2015000173A1 (fr) * 2013-07-05 2015-01-08 华为技术有限公司 Procédé d'établissement de tunnel, procédé d'attribution d'étiquette, dispositif, et système de réseau
US20160380823A1 (en) * 2015-06-23 2016-12-29 Cisco Technology, Inc. Virtual private network forwarding and nexthop to transport mapping scheme
CN108668308A (zh) * 2017-03-30 2018-10-16 中国移动通信集团内蒙古有限公司 一种lte　ptn传送网及其静态路由保护方法
CN109474495A (zh) * 2018-12-07 2019-03-15 新华三技术有限公司 一种隧道检测方法及装置

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