Redundant system of double-loop network link

Abstract

The invention relates to the technical field of double-loop network links, and particularly discloses a redundancy system of a double-loop network link, which comprises a main rack and a plurality of extension racks, and is characterized in that the main rack comprises a first controller, a second controller, a first CPU module base, a second CPU module base, a plurality of first I / O modules and a plurality of first I / O module bases, the first CPU module base is positioned at the head end of the main frame; according to the invention, by optimizing the network layout and reducing the transmission hop count of the data packet in the double-loop network, the network delay is reduced, the redundancy is ensured, the complexity of a redundant path is reduced as much as possible, the introduction of excessive extra delay is avoided, and a switch with high forwarding rate and low delay is selected, so that the overall performance of the network is improved, and the network performance is improved. High-quality optical fibers and cables are adopted, signal attenuation and transmission delay are reduced, and the length and complexity of a transmission path are correspondingly reduced, so that the phenomenon that network response time is increased is avoided, and use by people is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of dual-ring network links, and more particularly, to a redundant system for dual-ring network links. Background Art

[0002] The ring network redundancy system builds a ring network structure and implements redundant links and redundant switches therein to ensure rapid restoration of communication when a network failure occurs. When a link or a device in the network fails, the system can automatically switch to a backup link or device, thereby maintaining the continuity of network communication.

[0003] In the Chinese patent with the publication number CN117908438A, a redundant system for dual-ring network links is mentioned, which includes a main frame and N extended frames, where N is a natural number; the main frame includes controller A, controller B, CPU module base A, CPU module base B, N first I / O modules, and N first I / O module bases; the CPU module base A is located at the head end of the main frame; the CPU module base A is connected to the CPU module base B, and the CPU module base B is cascaded with N first I / O module bases in sequence; the controller A is connected to the CPU module base A, the controller B is connected to the CPU module base B, and the Nth first I / O module is connected to the Nth first I / O module base; this patent is configured as a dual-controller dual-ring redundant network and a single-controller ring redundant network, which improves the system reliability and solves the problem of communication interruption after the failure of the controller and communication module;

[0004] In the above document, although the system reliability is improved by configuring a dual-controller dual-ring redundant network and a single-controller ring redundant network, and the problem of communication interruption after the failure of the controller and communication module is solved, the dual-ring network structure, although improving the system reliability, increases the length and complexity of the transmission path because data packets need to be transmitted between two ring networks, resulting in an increase in network response time, which is not conducive to people's use. Summary of the Invention

[0005] In view of the above problems, the present invention provides a redundant system for dual-ring network links. By optimizing the network layout, reducing the number of transmission hops of data packets in the dual-ring network, thereby reducing network latency, while ensuring redundancy, minimizing the complexity of redundant paths as much as possible, avoiding introducing excessive additional latency, selecting switches with high forwarding rate and low latency to improve the overall performance of the network, and using high-quality optical fibers and cables to reduce signal attenuation and transmission latency, correspondingly reducing the length and complexity of the transmission path, thereby avoiding the increase in network response time and being conducive to people's use.

[0006] A redundant system for a dual-ring network link provided by the present invention includes a main frame and multiple expansion frames. The main frame includes a first controller, a second controller, a first CPU module base, a second CPU module base, multiple first I / O modules, and multiple first I / O module bases. The first CPU module base is located at the head end of the main frame. The first CPU module base is connected to the second CPU module base, and the second CPU module base is cascaded with multiple first I / O module bases in sequence.

[0007] The present invention is further described in detail. The first controller and the second controller form controller redundancy. The communication mode between the first I / O module and the second I / O module is M-LVDS (Multipoint low Voltage Differential Signaling) communication. The first controller and the second controller communicate with the first I / O module of the main frame and the second I / O module of the expansion frame through the M-LVDS communication circuits of the corresponding first CPU module base and second CPU module base, and the obtained information is transmitted between the first controller and the second controller.

[0008] The redundant system for the dual-ring network link further includes a redundant system network module and a redundant path module. The redundant system network module is used to optimize the use of the network of the redundant system, and the redundant path module is used to optimize the use of the redundant paths of the redundant system. The network delay of the redundant system is optimized through the redundant system network module and the redundant path module. The redundant system network module includes optimizing the network layout, using high-performance switches, and optimizing optical fibers and cables. Optimizing the network layout includes analyzing network requirements and designing network modules. Among them, analyzing network requirements is to clarify network layout requirements, and the network layout requirements include the number of users, service requirements, and data transmission volume. Designing network modules is to divide the network into different functional modules, and the functional modules include an access layer, an aggregation layer, and a core layer.

[0009] As can be seen from the above, the advantages of dividing the network of the redundant system into different functional modules are as follows:

[0010] Each functional module has clear functions and responsibilities, making the structure and functions of the entire system clearer and easier to understand, which helps developers and operation and maintenance personnel quickly understand the system architecture and improve work efficiency.

[0011] Different functional modules are relatively independent and can be developed in parallel, reducing the development cycle and cost. At the same time, each functional module can be independently tested and maintained, reducing the impact on other functional modules.

[0012] By dividing the network system into multiple functional modules, where each functional module only focuses on its own tasks and functions, the complexity of the system can be greatly simplified. This makes the system easier to understand and operate, reducing the likelihood of errors;

[0013] The coupling degree between functional modules is reduced, which helps to reduce the dependencies between systems and improve the stability and maintainability of the system;

[0014] When a fault occurs in a certain functional module, since other functional modules are relatively independent of it, the fault can be restricted to a local area and will not affect the operation of the entire system. This helps to quickly locate and solve problems, reducing downtime and losses;

[0015] In a redundant system, critical functional modules are usually equipped with redundant backups. When the main module fails, the backup module can quickly take over the work to ensure the continuity and stability of the system;

[0016] Since each functional module is relatively independent, it can be maintained and upgraded separately, which can reduce the impact on the entire system and improve the maintenance efficiency. As the business develops, the system may need to add new functional modules or expand the functions of existing modules. Since the system has adopted a modular design, functional modules can be flexibly added or deleted to meet the changes in business requirements;

[0017] By distributing traffic to different functional modules, load balancing can be achieved, improving the overall performance of the system. This helps to reduce the load pressure on individual modules, improving the response speed and throughput. Each functional module can optimize resource allocation according to its needs, such as CPU, memory, and bandwidth, which helps to maximize the utilization of resources and improve the operating efficiency of the system;

[0018] In summary, dividing the network of a redundant system into different functional modules can bring multiple benefits, including improving the manageability, maintainability, scalability, and overall performance of the system, helping to reduce the complexity and maintenance costs of the system, and improving the stability and reliability of the system, thus creating greater value for the enterprise.

[0019] The present invention is further specifically described in detail. The redundant path module includes clarifying design goals and requirements, selecting a suitable redundant path scheme, optimizing the network topology structure, and adopting advanced technologies and protocols;

[0020] As can be seen from the above, clarifying the network layout requirements of a redundant system is crucial for building an efficient, reliable, and scalable network architecture. The advantages of clarifying the network layout requirements of a redundant system are as follows:

[0021] By clarifying the network layout requirements of the redundant system, it is possible to ensure that the risk of single-point failures is fully considered in network design and corresponding redundancy measures are taken to avoid them, including deploying backup devices at critical nodes, using multi-path routing, etc. Thus, when a component or link in the network fails, it is possible to quickly switch to backup resources to ensure the continuity and stability of the network;

[0022] Clear network layout requirements for the redundant system contribute to building a network architecture with strong fault tolerance. Through redundant design, the system can tolerate a certain degree of hardware or software failures without seriously affecting the business, which is particularly important for critical business applications as they require continuous and uninterrupted services;

[0023] Clarifying the network layout requirements of the redundant system can more effectively achieve load balancing. By distributing traffic across multiple paths or devices, the burden on a single path or device can be reduced, improving the overall performance and response speed of the network;

[0024] Redundant design allows the network to utilize additional bandwidth resources when needed to meet the requirements of bursty traffic or peak periods, which helps ensure that the network can maintain stable performance under high loads and improves the utilization rate of bandwidth;

[0025] Clear network layout requirements for the redundant system make the network architecture more flexible and scalable. As the business develops and demands grow, new paths, devices, or functional modules can be easily added to meet higher bandwidth and performance requirements without significantly affecting the existing system;

[0026] Through reasonable redundant design, hardware upgrades or software updates can be carried out without interrupting services, which helps reduce upgrade costs and minimize downtime and business losses caused by upgrades;

[0027] Clear network layout of the redundant system helps simplify the fault troubleshooting process. When a network failure occurs, operation and maintenance personnel can quickly locate the problem based on the layout of the redundant design and take corresponding measures to repair it;

[0028] Redundant design makes the various components and links in the network relatively independent, allowing them to be maintained and tested separately, which can improve the convenience of maintenance and reduce downtime and business impact caused by maintenance;

[0029] Redundant design not only focuses on the continuity and stability of the network but also on data security. Through measures such as data backup and redundant storage, it can ensure that data is not lost or damaged in the event of a network failure or attack;

[0030] The network layout of the redundancy system can also enhance the network's defense against external attacks. By deploying multiple security devices such as firewalls and intrusion detection systems and distributing them at different network levels, a multi-layered defense system can be formed to improve the overall security of the network;

[0031] In summary, clarifying the requirements for the network layout of the redundancy system is of great significance for building an efficient, reliable, scalable, easily maintainable, and secure network architecture, which can directly benefit the enterprise's business operations and long-term development.

[0032] The advantages of reasonably designing redundant paths in the network architecture are as follows:

[0033] By providing multiple available communication paths, redundant paths can significantly reduce the risk of single-point failures. When the primary path fails, traffic can quickly switch to the backup path, thus maintaining network connectivity and service availability;

[0034] Redundant design enables the network to tolerate a certain degree of hardware or software failures without seriously affecting the business. This fault tolerance ability is particularly important for critical business applications as they require continuous and uninterrupted services;

[0035] By distributing traffic across multiple paths, redundant design helps achieve load balancing, reducing the burden on a single path or device. This can not only improve the overall performance of the network but also extend the service life of devices and links;

[0036] Redundant paths allow the network to utilize additional bandwidth resources when needed to meet the requirements of bursty traffic or peak hours, helping to ensure that the network can maintain stable performance under high loads. Redundant design makes the network architecture more flexible and scalable. As the business develops and demands grow, new paths or devices can be easily added to meet higher bandwidth and performance requirements;

[0037] In case of a failure, redundant paths can quickly take over the communication tasks, thus greatly reducing the risk of downtime and data loss, which is crucial for business applications that require high reliability and data integrity. By improving the reliability and performance of the network, redundant design helps enhance the overall user experience. Users will be able to enjoy a more stable, fast, and reliable network service, thereby increasing satisfaction and loyalty;

[0038] Although redundant design may require a higher initial investment, in the long run, it can reduce maintenance costs. By reducing failures and downtime, enterprises can save the costs incurred in repairing faults and restoring services. In addition, redundant design can also extend the service life of devices and links, further reducing maintenance costs;

[0039] In summary, the reasonable design of redundant paths is crucial for building a highly reliable, high-performance, and highly scalable network architecture. It can not only improve the reliability and fault tolerance of the network, but also optimize load balancing, increase bandwidth utilization, reduce the risk of downtime and data loss, thereby enhancing the user experience and reducing maintenance costs.

[0040] The redundant system of the dual-ring network link further includes a fault detection module and a test optimization module. The fault detection module is used to detect faults in the redundant system, and the test optimization module is used to test the redundant system; the zero reconstruction time of the redundant system is achieved through the fault detection module and the test optimization module.

[0041] The present invention further details specifically that the fault detection module includes fast fault detection technology and distributed monitoring;

[0042] As can be seen from the above, by adopting efficient fault detection algorithms and protocols, such as the fast fault detection mechanism in the link layer protocol, the situation of link interruption or performance degradation can be quickly identified;

[0043] Monitoring devices are deployed at each node or key position of the dual-ring network to achieve distributed monitoring of the network status, so as to promptly discover and locate the fault points.

[0044] The present invention further details specifically that the test optimization module includes system testing, and the content of the system testing includes fault injection testing, stress testing, and performance testing;

[0045] As can be seen from the above, comprehensive testing is carried out before the deployment of the dual-ring network redundant system, including fault injection testing, stress testing, and performance testing, etc., to ensure that the system can operate stably under various conditions; at the same time, according to the actual operation situation of the system, continuously optimize the fault detection, switching, and recovery strategies to improve the overall performance and reliability of the system.

[0046] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are as follows:

[0047] By optimizing the network layout, the present invention reduces the number of transmission hops of data packets in the dual-ring network, thereby reducing network latency. While ensuring redundancy, it minimizes the complexity of redundant paths as much as possible to avoid introducing excessive additional latency. Switches with high forwarding rates and low latency are selected to improve the overall performance of the network. High-quality optical fibers and cables are used to reduce signal attenuation and transmission latency, correspondingly reducing the length and complexity of the transmission path, thereby avoiding the increase in network response time and facilitating people's use. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic structural diagram of a redundant system of a dual-ring network link provided by an embodiment of the present invention.

[0049] Figure 2 This is a schematic diagram of the functional module division in the embodiments of the present invention. Detailed implementation manners

[0050] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] An embodiment of the present invention provides a redundant system for a dual-ring network link, including a main frame and a plurality of expansion frames. The main frame includes a first controller, a second controller, a first CPU module base, a second CPU module base, a plurality of first I / O modules, and a plurality of first I / O module bases. The first CPU module base is located at the head end of the main frame, the first CPU module base is connected to the second CPU module base, and the second CPU module base is cascaded with a plurality of first I / O module bases in sequence.

[0053] The present invention is further specifically described in detail. The first controller and the second controller form controller redundancy. The communication mode between the first I / O module and the second I / O module is M-LVDS communication. The first controller and the second controller communicate with the first I / O module of the main frame and the second I / O module of the expansion frame through the M-LVDS communication circuits of the corresponding first CPU module base and second CPU module base, and the obtained information is transmitted between the first controller and the second controller.

[0054] As Figure 1 shown, the redundant system for the dual-ring network link further includes:

[0055] A redundant system network module for optimizing the use of the network of the redundant system;

[0056] A redundant path module for optimizing the use of the redundant path of the redundant system;

[0057] A fault detection module for detecting faults in the redundant system;

[0058] The test optimization module is used to test the redundant system.

[0059] The network latency of the redundant system is optimized and used through the redundant system network module and the redundant path module. The redundant system network module includes optimizing the network layout, using high-performance switches, and optimizing optical fibers and cables. The optimization of the network layout includes analyzing the network requirements and designing the network module. Among them, the analysis of the network requirements is to clarify the network layout requirements, and the network layout requirements include the number of users, business requirements, and data transmission volume. The design of the network module is to divide the network into different functional modules, such as Figure 2 As shown, the functional modules are the access layer, the aggregation layer, and the core layer.

[0060] As can be seen from the above, the advantages of dividing the network of the redundant system into different functional modules are as follows:

[0061] Each functional module has clear functions and responsibilities, making the structure and functions of the entire system clearer and easier to understand, which helps developers and operation and maintenance personnel quickly understand the system architecture and improve work efficiency;

[0062] The different functional modules are relatively independent and can be developed in parallel, reducing the development cycle and cost. At the same time, each functional module can be independently tested and maintained, reducing the impact on other functional modules;

[0063] By dividing the network system into multiple functional modules, each functional module only focuses on its own tasks and functions, which can greatly simplify the complexity of the system. This makes the system easier to understand and operate, reducing the possibility of errors;

[0064] The coupling degree between functional modules is reduced, which helps to reduce the dependency relationship between systems and improve the stability and maintainability of the system;

[0065] When a certain functional module fails, since other functional modules are relatively independent of it, the failure can be limited to a local range and will not affect the operation of the entire system, which helps to quickly locate and solve problems, reducing downtime and losses;

[0066] In the redundant system, the key functional modules are usually equipped with redundant backups. When the main module fails, the backup module can quickly take over the work to ensure the continuity and stability of the system;

[0067] Since each functional module is relatively independent, it can be maintained and upgraded separately, which can reduce the impact on the entire system and improve the maintenance efficiency. As the business develops, the system may need to add new functional modules or expand the functions of existing modules. Since the system has adopted a modular design, functional modules can be flexibly added or deleted to meet the changes in business requirements;

[0068] By distributing traffic to different functional modules, load balancing can be achieved, improving the overall performance of the system. This helps reduce the load pressure on individual modules, enhancing the response speed and throughput. Each functional module can optimize resource allocation according to its needs, such as CPU, memory, and bandwidth, which contributes to maximizing the utilization of resources and improving the operating efficiency of the system;

[0069] In summary, dividing the network of a redundant system into different functional modules can bring multiple benefits, including improving the system's manageability, maintainability, scalability, and overall performance. It helps reduce system complexity and maintenance costs, enhancing system stability and reliability, thereby creating greater value for the enterprise.

[0070] The present invention is further specifically described in detail. The redundant path module includes clarifying design goals and requirements, selecting appropriate redundant path schemes, optimizing the network topology structure, and adopting advanced technologies and protocols;

[0071] As can be seen from the above, clarifying the network layout requirements of a redundant system is crucial for building an efficient, reliable, and scalable network architecture. The advantages of clarifying the network layout requirements of a redundant system are as follows:

[0072] By clarifying the network layout requirements of a redundant system, it can ensure that the risk of single-point failures is fully considered in network design and corresponding redundancy measures are taken to avoid them. This includes deploying backup devices at critical nodes, using multi-path routing, etc., so that when a component or link in the network fails, it can quickly switch to backup resources to ensure network continuity and stability;

[0073] Clear network layout requirements of a redundant system contribute to building a network architecture with strong fault tolerance. Through redundant design, the system can tolerate a certain degree of hardware or software failures without seriously affecting the business, which is particularly important for critical business applications as they require continuous and uninterrupted services;

[0074] Clarifying the network layout requirements of a redundant system can more effectively achieve load balancing. By dispersing traffic to multiple paths or devices, the burden on a single path or device can be reduced, improving the overall performance and response speed of the network;

[0075] Redundant design allows the network to utilize additional bandwidth resources when needed to meet the requirements of bursty traffic or peak periods, which helps ensure that the network can still maintain stable performance under high load conditions and improve the utilization rate of bandwidth;

[0076] The clear requirements for the network layout of the redundant system make the network architecture more flexible and scalable. As the business develops and demands grow, new paths, devices, or functional modules can be easily added to meet higher bandwidth and performance requirements without significantly affecting the existing system;

[0077] Through reasonable redundant design, hardware upgrades or software updates can be carried out without interrupting services, which helps reduce upgrade costs and minimize downtime and business losses caused by upgrades;

[0078] The clear network layout of the redundant system helps simplify the troubleshooting process. When network failures occur, operation and maintenance personnel can quickly locate the problem according to the layout of the redundant design and take corresponding measures for repair;

[0079] Redundant design makes each component and link in the network relatively independent, which can be maintained and tested separately, improving the convenience of maintenance and reducing downtime and business impacts caused by maintenance;

[0080] Redundant design not only focuses on the continuity and stability of the network but also on data security. Through measures such as data backup and redundant storage, it can ensure that data will not be lost or damaged in the event of network failures or attacks;

[0081] The network layout of the redundant system can also enhance the network's defense capabilities against external attacks. By deploying multiple security devices such as firewalls and intrusion detection systems and distributing them at different network levels, a multi-level defense system can be formed to improve the overall security of the network;

[0082] In summary, clear requirements for the network layout of the redundant system are of great significance for building an efficient, reliable, scalable, easy-to-operate-and-maintain, and secure network architecture, which can directly benefit the business operations and long-term development of enterprises.

[0083] The advantages of reasonably designing redundant paths in the network architecture are as follows:

[0084] Redundant paths significantly reduce the risk of single-point failures by providing multiple available communication paths. When the main path fails, traffic can quickly switch to the backup path, thus maintaining network connectivity and service availability;

[0085] Redundant design enables the network to tolerate a certain degree of hardware or software failures without seriously affecting the business. This fault tolerance is particularly important for critical business applications as they require continuous and uninterrupted services;

[0086] By distributing traffic across multiple paths, redundant design helps achieve load balancing, reducing the burden on a single path or device. This not only improves the overall performance of the network but also extends the service life of devices and links.

[0087] Redundant paths allow the network to utilize additional bandwidth resources when needed to meet the requirements of bursty traffic or peak hours, helping to ensure stable performance under high loads. Redundant design makes the network architecture more flexible and scalable. As the business grows and demands increase, new paths or devices can be easily added to meet higher bandwidth and performance requirements.

[0088] In case of failures, redundant paths can quickly take over communication tasks, greatly reducing the risk of downtime and data loss, which is crucial for business applications that require high reliability and data integrity. By enhancing network reliability and performance, redundant design helps improve the overall user experience. Users will be able to enjoy a more stable, fast, and reliable network service, thus increasing satisfaction and loyalty.

[0089] Although redundant design may require a relatively high initial investment, in the long run, it can reduce maintenance costs. By reducing failures and downtime, enterprises can save the costs associated with repairing faults and restoring services. In addition, redundant design can extend the service life of devices and links, further reducing maintenance costs.

[0090] In summary, a reasonable design of redundant paths is crucial for building a highly reliable, high-performance, and highly scalable network architecture. It can not only improve network reliability and fault tolerance but also optimize load balancing, increase bandwidth utilization, reduce the risk of downtime and data loss, thus enhancing the user experience and reducing maintenance costs.

[0091] Achieve zero reconstruction time for the redundant system through a fault detection module and a test optimization module.

[0092] The present invention is further described in detail. The fault detection module includes fast fault detection technology and distributed monitoring.

[0093] As can be seen from the above, by adopting efficient fault detection algorithms and protocols, such as the fast fault detection mechanism in link layer protocols, it is possible to quickly identify link interruptions or performance degradation.

[0094] Deploy monitoring devices at each node or key positions in a dual-ring network to achieve distributed monitoring of the network status, so as to promptly detect and locate fault points.

[0095] The present invention is further described in detail. The test optimization module includes system testing, and the content of the system testing includes fault injection testing, stress testing, and performance testing.

[0096] As can be seen from the above, a comprehensive test should be carried out before the deployment of the dual-ring network redundancy system, including fault injection test, stress test, performance test, etc., to ensure that the system can operate stably under various conditions; at the same time, according to the actual operation of the system, continuously optimize the fault detection, switching and recovery strategies to improve the overall performance and reliability of the system.

[0097] In summary, by optimizing the network layout, reducing the transmission hops of data packets in the dual-ring network, thereby reducing network latency, while ensuring redundancy, minimizing the complexity of redundant paths as much as possible, avoiding introducing too much additional latency, selecting switches with high forwarding rate and low latency to improve the overall performance of the network, and using high-quality optical fibers and cables to reduce signal attenuation and transmission latency.

[0098] Furthermore, the present application is applied to optimize the network latency phenomenon that appears in the redundancy system of the dual-ring network link, reducing the length and complexity of the transmission path, thereby avoiding the increase in network response time, which is beneficial for people to use.

[0099] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A redundant system for a dual-ring network link, characterized in that, It includes a main frame and multiple expansion frames. The main frame includes a first controller, a second controller, a first CPU module base, a second CPU module base, multiple first I / O modules and multiple first I / O module bases. The first CPU module base is located at the head end of the main frame. The first CPU module base is connected to the second CPU module base, and the second CPU module base is cascaded with multiple first I / O module bases in sequence; The redundant system of the dual-ring network link further includes: A redundant system network module for optimizing the use of the network of the redundant system; A redundant path module for optimizing the use of the redundant paths of the redundant system; A fault detection module for detecting faults in the redundant system; A test optimization module for testing the redundant system.

2. The redundant system of a dual-ring network link according to claim 1, wherein: The redundant system network module includes optimizing the network layout, using high-performance switches, and optimizing optical fibers and cables.

3. The redundant system of a dual-ring network link according to claim 2, characterized in that: The optimization of the network layout includes analyzing the network requirements and designing the network module; the analysis of the network requirements is to clarify the network layout requirements, and the network layout requirements include the number of users, service requirements, and data transmission volume.

4. A redundancy system for a dual-ring network link according to claim 3, characterized in that: The design of the network module is to divide the network into different functional modules, and the functional modules include an access layer, an aggregation layer, and a core layer.

5. A redundancy system for a dual-ring network link according to claim 1, characterized in that: The redundant path module includes clarifying the design objectives and requirements, selecting a suitable redundant path scheme, optimizing the network topology structure, and adopting advanced technologies and protocols.

6. The redundant system of a dual-ring network link according to claim 1, characterized in that: The fault detection module includes fast fault detection technology and distributed monitoring.

7. A redundancy system for a dual-ring network link according to claim 1, characterized in that: The test optimization module includes testing the system, and the content of the system test includes fault injection test, stress test, and performance test.

8. A redundancy system for a dual-ring network link according to claim 1, characterized in that: The first controller and the second controller form controller redundancy.

9. A redundancy system for a dual-ring network link according to claim 1, characterized in that: The communication method between the first I / O module and the second I / O module is M-LVDS communication.

10. A redundancy system for a dual-ring network link according to claim 9, characterized in that: The first controller and the second controller communicate with the first I / O module of the main frame and the second I / O module of the expansion frame through the M-LVDS communication circuit of the CPU module base, and the information obtained is transmitted between the first controller and the second controller.

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