A network logical link auto-association method and device

Abstract

This invention relates to a method and apparatus for automatically associating network logical links. The method includes: acquiring ARP configuration information from all BNG / SR devices; processing the ARP configuration information to obtain an ARP configuration information list; acquiring a local OLT device information table; associating the MAC addresses in the ARP configuration information list with the OLT network management IP addresses in the local OLT device information table to obtain a first OLT-BNG / SR device link table; acquiring OLT network management configuration information from all BNG / SR devices; processing the OLT network management configuration information to obtain an OLT network management configuration information list; querying the OLT network management configuration information list based on the virtual gateway addresses in the OLT network management configuration information list to obtain static OLT-BNG / SR device links; and using the static OLT-BNG / SR device links to complete the first OLT-BNG / SR device link table to obtain a second OLT-BNG / SR device link table.

Description

Technical Field

[0001] This invention relates to the field of network management service support in the communications industry, and in particular to a method and apparatus for automatic association of network logical links. Background Technology

[0002] Currently, maintenance personnel obtain OLT-BNG / SR device link information primarily by manually searching for OLT-BNG / SR networking device link information through localized spreadsheets and ledgers. Then, depending on whether it's a new or reused link, they reallocate or select service information on the reused link. The manual search process for OLT-BNG / SR links is as follows:

[0003] 1. Locate the BNG / SR primary / backup device name, device IP, and corresponding network management sub-interface information in the localized table ledger; 2. Manually log in to the BNG / SR device and enter the command to query the BNG / SR network management sub-interface configuration file; 3. Manually calculate the range of OLT IP based on the gateway network segment configured in the network management sub-interface configuration file; 4. Based on the calculated OLT IP, compare it with the localized table ledger to determine the OLT has an OLT-BNG / SR device link.

[0004] Existing technical solutions involve manually logging into the BNG / SR device and analyzing and estimating the OLT IP by querying the gateway network segment configured on the network management sub-interface, thereby obtaining the OLT-BNG / SR link. This approach has the following main drawbacks:

[0005] 1. The process is complex, manpower-intensive, and takes a long time to process applications.

[0006] Because networks are constantly changing, and devices undergo cutovers, migrations, shutdowns, version upgrades, and network modifications, manual searches require identifying whether any of these engineering statuses exist within the business chain. This makes the manual search process complex and time-consuming. Manual searches are inefficient and result in lengthy service deployment times.

[0007] 2. Manual searching cannot guarantee accuracy:

[0008] The algorithm for manually searching for business associations is unreasonable. Static configuration information on BNG / SR may lead to an expanded scope of queries due to project status or configuration maintenance, making it impossible to guarantee accurate retrieval of business chain information on the network. Summary of the Invention

[0009] The purpose of this invention is to provide a method and apparatus for automatically associating network logical links, aiming to overcome the shortcomings of existing technologies. The ARP table is a real-time network information cache table on BNG / SR devices, recording in real-time information such as the IP address, MAC address, and logical port information of the OLT network management system that is currently normally interconnected on the BNG / SR device. This invention utilizes the characteristics of the ARP table, combined with the configuration information of the BNG / SR device itself, to perform service abstraction analysis and summarization, thereby achieving automatic association of metropolitan area network device links based on the ARP table.

[0010] Firstly, a method for automatically associating network logical links is provided, including:

[0011] ARP configuration information is obtained from multiple BNG / SR devices. The ARP configuration information is processed to obtain an ARP configuration information list. The ARP configuration information list includes at least the identifier of each BNG / SR device and its corresponding MAC address. The MAC address is the OLT network management IP address of the OLT device connected to the BNG / SR device.

[0012] Obtain the local OLT device information table, associate the MAC address of each BNG / SR device in the ARP configuration information list with the OLT network management IP address in the local OLT device information table, and obtain the first OLT-BNG / SR device link table;

[0013] Obtain OLT network management configuration information from multiple BNG / SR devices, process the OLT network management configuration information to obtain an OLT network management configuration information list, wherein the OLT network management configuration information list includes at least the identifier of each BNG / SR device and its corresponding virtual gateway address, and the virtual gateway address corresponds one-to-one with the OLT device connected to the BNG / SR device;

[0014] Based on the virtual gateway address in the OLT network management configuration information list, a query is performed in the OLT network management configuration information list to obtain the static OLT-BNG / SR device link. The static OLT-BNG / SR device link is used to complete the first OLT-BNG / SR device link table to obtain the second OLT-BNG / SR device link table.

[0015] In this context, BNG represents a broadband network gateway, SR represents a full-service router, ARP represents Address Resolution Protocol, OLT represents an optical fiber line terminal, and the OLT-BNG / SR device link table records the BNG / SR devices connected to each OLT device.

[0016] In one possible implementation, after obtaining the second OLT-BNG / SR device link table, the method further includes:

[0017] The second OLT-BNG / SR device link table is filtered to obtain the third OLT-BNG / SR device link table.

[0018] In one possible implementation, processing the ARP configuration information to obtain an ARP configuration information list includes:

[0019] The ARP configuration information is extracted to obtain valid ARP configuration information, which includes at least the device name, device IP, MAC address, address type, and network management sub-interface.

[0020] The valid ARP configuration information is filtered, and data with the address type of network management address is retained to obtain an ARP configuration information list.

[0021] In one possible implementation, before extracting the ARP configuration information, the method further includes:

[0022] Based on the Apache Kafka framework, a compression algorithm is used to compress the ARP configuration information.

[0023] In one possible implementation, the process of processing the OLT network management configuration information to obtain an OLT network management configuration information list includes:

[0024] The OLT network management configuration information is extracted to obtain an OLT network management configuration information list, which includes at least the device name, device IP, network management address, virtual gateway address, and network management sub-interface.

[0025] In one possible implementation, before extracting the OLT network management configuration information, the method further includes:

[0026] Based on the Apache Kafka framework, a compression algorithm is used to compress the OLT network management configuration information.

[0027] In one possible implementation, the method for obtaining the virtual gateway address in the OLT network management configuration information list includes:

[0028] The BNG device IP and network management sub-interface information in the first OLT-BNG / SR device link table are correlated and analyzed with the BNG device IP and network management sub-interface in the OLT network management configuration information list to obtain the virtual gateway address in the OLT network management configuration information list.

[0029] In one possible implementation, the filtering operation includes:

[0030] Remove devices in the second OLT-BNG / SR device link table that are in the engineering or offline status.

[0031] In one possible implementation, the compression algorithm is the LZ4 compression algorithm.

[0032] Secondly, a network logical link automatic association device is provided, comprising:

[0033] An ARP processing unit is configured to acquire ARP configuration information from multiple BNG / SR devices, process the ARP configuration information to obtain an ARP configuration information list, wherein the ARP configuration information list includes at least the identifier of each BNG / SR device and its corresponding MAC address, the MAC address being the OLT network management IP address of the OLT device connected to the BNG / SR device; an association unit is configured to acquire a local OLT device information table, associate the MAC address of each BNG / SR device in the ARP configuration information list with the OLT network management IP address in the local OLT device information table to obtain a first OLT-BNG / SR device link table; and an OLT processing unit is configured to acquire OLT network management configuration information from multiple BNG / SR devices, process the OLT network management configuration information to obtain an OLT network management configuration information list. In the OLT network management configuration information list, at least the identifier of each BNG / SR device and its corresponding virtual gateway address are included. The virtual gateway address corresponds one-to-one with the OLT device connected to the BNG / SR device. The completion unit is configured to query the OLT network management configuration information list according to the virtual gateway address in the OLT network management configuration information list to obtain static OLT-BNG / SR device links, and use the static OLT-BNG / SR device links to complete the first OLT-BNG / SR device link table to obtain the second OLT-BNG / SR device link table. Herein, BNG represents a broadband network gateway, SR represents a full-service router, ARP represents Address Resolution Protocol, OLT represents an optical fiber line terminal, and the OLT-BNG / SR device link table records the BNG / SR devices connected to each OLT device.

[0034] This invention proposes an automatic network logical link association method and apparatus. Utilizing the ARP routing table's real-time reflection of network service availability, it enables automatic association between the ARP table and metropolitan area network (MAN) device configuration information to obtain OLT-BNG / SR device links. This replaces the current inefficient method of manually identifying and maintaining device links, significantly improving efficiency and reducing labor costs. Furthermore, because the ARP table reflects network service availability in real time, the technical solution of this invention can theoretically ensure 100% accuracy in OLT-BNG / SR device link association. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the conventional networking structure of a metropolitan area network (MAN) OLT-BNG / SR.

[0036] Figure 2 This is a flowchart of a method for automatically associating network logical links according to an embodiment of the present invention;

[0037] Figure 3 This is a schematic diagram of the ARP configuration information processing flow disclosed in an embodiment of the present invention;

[0038] Figure 4 This is a schematic diagram of the process for associating ARP configuration information and OLT device information table according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic diagram of the process for processing OLT configuration information disclosed in an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the process for analyzing and completing the OLT-BNG / SR device link disclosed in an embodiment of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of an automatic network logical link association device disclosed in an embodiment of the present invention. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Before providing a detailed description of the embodiments of this application, the terms and symbols used in the embodiments of this application will be explained first.

[0044] OLT: Optical Line Terminal, refers to terminal equipment used to connect to optical fiber trunk lines.

[0045] SR: Service Router, used to terminate and manage users' PPPoE / IPoE sessions.

[0046] BNG: Broadband Network Gateway. IP edge nodes are collectively referred to as BNG. BRAS (Broadband Remote Access Server) and SR are both manifestations of BNG. BNG is mainly used for user and service control, including address allocation.

[0047] CR: Core Router. A core router is a router that forwards packets to computer hosts in a network. In the Internet, it is located in the network core and is mainly used for data packet routing and forwarding. It is generally a router with a large throughput.

[0048] ARP table: ARP stands for Address Resolution Protocol. It is a real-time network information cache table on BNG / SR devices, which records in real time the IP address information, MAC address information, logical port information, etc. of the OLT network management system that is currently connected to the network on the BNG / SR device.

[0049] Apache Kafka: Apache Kafka is a distributed data stream processing platform that enables real-time publishing, subscription, storage, and processing of data streams.

[0050] OLT-BNG / SR Device Link Table: Records the BNG / SR devices connected to each OLT device.

[0051] To facilitate understanding of the embodiments of the present invention, further explanations and descriptions will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of the present invention.

[0052] The conventional networking architecture of the metropolitan area network (MAN) OLT-BNG / SR is divided into: OLT-BNG / SR single uplink networking and OLT-BNG / SR dual uplink networking. The device link networking structure diagram is shown below. Figure 1 As shown. In a single uplink OLT-BNG / SR network, one OLT device is connected to one BNG / SR device; in a dual uplink OLT-BNG / SR network, one OLT device is connected to two BNG / SR devices.

[0053] To address the issues of low efficiency and inaccuracy in manual link association queries for metropolitan area network (MAN) leased line services, this invention proposes a business logic algorithm based on the ARP table, which is a real-time cache table for recording network information. This algorithm, combined with the OLT network management configuration information of BNG / SR devices, performs association analysis and establishes a business logic algorithm for automatically associating MAN networking device links based on the ARP table. This enables automatic association of MAN networking device links, thereby obtaining accurate and complete link information.

[0054] Figure 2 This is a flowchart illustrating an automatic network logical link association method disclosed in an embodiment of the present invention. Figure 2 As shown, the method includes at least the following steps:

[0055] Step 201: Obtain ARP configuration information from all BNG / SR devices, process the ARP configuration information to obtain an ARP configuration information list; Step 202: Obtain a local OLT device information table, associate the MAC addresses in the ARP configuration information list with the OLT network management IP addresses in the local OLT device information table to obtain a first OLT-BNG / SR device link table; Step 203: Obtain OLT network management configuration information from all BNG / SR devices, process the OLT network management configuration information to obtain an OLT network management configuration information list; Step 204: Based on the virtual gateway address in the OLT network management configuration information list, query the OLT network management configuration information list to obtain static OLT-BNG / SR device links, and use the static OLT-BNG / SR device links to complete the first OLT-BNG / SR device link table to obtain a second OLT-BNG / SR device link table.

[0056] First, in step 201, the ARP configuration information of all BNG / SR devices is obtained, and the ARP configuration information is processed to obtain an ARP configuration information list. The ARP configuration information list includes at least the identifier of each BNG / SR device and its corresponding MAC address, where the MAC address is the OLT network management IP address of the OLT device to which the BNG / SR device is connected.

[0057] Specifically, the production side is based on the Apache Kafka framework and uses a compression algorithm to compress and transmit the ARP configuration information. Preferably, the compression algorithm used is LZ4 compression.

[0058] Upon receiving the compressed ARP configuration information, the consumer first decompresses the information using the corresponding decompression algorithm. Then, it extracts the ARP configuration information collected by each BNG / SR to obtain valid ARP configuration information, which includes at least the device name, device IP, MAC address, address type, and network management sub-interface. The valid ARP configuration information is then filtered, retaining only data with the address type being a network management address, resulting in an ARP configuration information list. A flowchart of step 201 can be shown below. Figure 3 As shown.

[0059] After the data processing in step 201, a list of ARP configuration information for all BNG / SR devices can be obtained.

[0060] Then, in step 202, the local OLT device information table is obtained, and the MAC addresses in the ARP configuration information list are associated with the OLT network management IP addresses in the local OLT device information table to obtain the real-time online OLT-BNG / SR link table. This real-time online OLT-BNG / SR link table can be referred to as the first OLT-BNG / SR device link table.

[0061] After ARP configuration information is compressed, aggregated, and cleaned, the MAC address is the OLT management IP address connected to the BNG / SR device, referred to as the OLT IP. The MAC address is then associated with the OLT IP in the OLT device information table managed in the local resource database to obtain the currently online OLT-BNG / SR device link information for the managed OLT device. The flowchart for step 202 can be shown below. Figure 4 As shown.

[0062] Subsequently, in step 203, the OLT network management configuration information on all BNG / SR devices is obtained, and the OLT network management configuration information is processed to obtain an OLT network management configuration information list. The OLT network management configuration information list includes at least the identifier of each BNG / SR device and its corresponding virtual gateway address, with each virtual gateway address corresponding one-to-one with the OLT device connected to that BNG / SR device.

[0063] Specifically, the production side uses the Apache Kafka framework and a compression algorithm to compress the OLT network management configuration information. Preferably, the compression algorithm used is the LZ4 compression algorithm.

[0064] Upon receiving the compressed OLT network management configuration information, the consumer first decompresses the information using the corresponding decompression algorithm. Then, it extracts the OLT network management configuration information to obtain an OLT network management configuration information list. This list includes at least the device name, device IP, network management address, virtual gateway address, and network management sub-interface. A flowchart of step 203 can be shown below. Figure 5 As shown.

[0065] The OLT network management configuration information is a static configuration on the BNG / SR device. Although it records the OLT network management address information connected to the BNG / SR, its static nature does not reflect the real-time status of the OLT-BNG / SR device link. The ARP configuration information list provides real-time feedback on the devices on the network, accurately reflecting the current normal operation of the OLT-BNG / SR device link. However, it also has problems arising from real-time online status. For example, if a device goes offline, the real-time online OLT-BNG / SR device link obtained from the correlation analysis will be incomplete. Therefore, it is necessary to perform further correlation analysis based on the static OLT network management configuration information on the BNG / SR device to complete the OLT-BNG / SR device link, as described in step 204.

[0066] In step 204, based on the virtual gateway address in the OLT network management configuration information list, a query is performed in the OLT network management configuration information list to obtain static OLT-BNG / SR device links. These static OLT-BNG / SR device links are then used to complete the first OLT-BNG / SR device link table, resulting in a second OLT-BNG / SR device link table. The completed OLT-BNG / SR device link table can be referred to as the second OLT-BNG / SR device link table.

[0067] Specifically, the BNG device IP and network management sub-interface information in the first OLT-BNG / SR device link table are correlated and analyzed with the BNG device IP and network management sub-interface in the OLT network management configuration information list to obtain the virtual gateway address in the OLT network management configuration information list.

[0068] Since the virtual gateway address is unique, and there is a one-to-one relationship between the virtual gateway address and the OLT in the OLT-BNG / SR device link, a query is performed in the OLT network management configuration information list based on the virtual gateway address to obtain the static OLT-BNG / SR device link. This static OLT-BNG / SR device link is then used to complete the first OLT-BNG / SR device link table, resulting in the second OLT-BNG / SR device link table. The flowchart for step 204 can be shown below. Figure 6As shown.

[0069] Due to factors such as business expansion, equipment version upgrades, and equipment fault migration, there are engineering operations such as new BNG / SR equipment joining the network and cutover migration, which may result in a situation where one OLT connects to 3 or 4 BNG / SR devices in the OLT-BNG / SR equipment link.

[0070] Therefore, in some possible implementations, after step 204, the method further includes step 205, which filters the second OLT-BNG / SR device link table to obtain a filtered OLT-BNG / SR device link table. The filtered OLT-BNG / SR device link table can be represented as a third OLT-BNG / SR device link table. In some embodiments, devices in the second OLT-BNG / SR device link table that are in an engineering state or an offline state are removed.

[0071] Figure 7 This is a schematic diagram of a network logical link automatic association device disclosed in an embodiment of the present invention. The device 700 includes:

[0072] ARP processing unit 701 is configured to obtain ARP configuration information from multiple BNG / SR devices, process the ARP configuration information to obtain an ARP configuration information list, wherein the ARP configuration information list includes at least the identifier of each BNG / SR device and its corresponding MAC address, and the MAC address is the OLT network management IP address of the OLT device connected to the BNG / SR device.

[0073] The association unit 702 is configured to obtain a local OLT device information table, associate the MAC address of each BNG / SR device in the ARP configuration information list with the OLT network management IP address in the local OLT device information table, and obtain a first OLT-BNG / SR device link table.

[0074] OLT processing unit 703 is configured to acquire OLT network management configuration information on multiple BNG / SR devices, process the OLT network management configuration information to obtain an OLT network management configuration information list, wherein the OLT network management configuration information list includes at least the identifier of each BNG / SR device and its corresponding virtual gateway address, and the virtual gateway address corresponds one-to-one with the OLT device connected to the BNG / SR device;

[0075] The completion unit 704 is configured to query the OLT network management configuration information list based on the virtual gateway address in the OLT network management configuration information list to obtain static OLT-BNG / SR device links, and use the static OLT-BNG / SR device links to complete the first OLT-BNG / SR device link table to obtain the second OLT-BNG / SR device link table.

[0076] In this context, BNG represents a broadband network gateway, SR represents a full-service router, ARP represents Address Resolution Protocol, OLT represents an optical fiber line terminal, and the OLT-BNG / SR device link table records the BNG / SR devices connected to each OLT device.

[0077] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0078] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0079] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for automatically associating network logical links, characterized in that, include: ARP configuration information is obtained from multiple BNG / SR devices. The ARP configuration information is processed to obtain an ARP configuration information list. The ARP configuration information list includes at least the identifier of each BNG / SR device and its corresponding MAC address. The IP address corresponding to the MAC address is the OLT network management IP address of the OLT device connected to the BNG / SR device. Obtain the local OLT device information table, associate the MAC address of each BNG / SR device in the ARP configuration information list with the OLT network management IP address in the local OLT device information table, and obtain the first OLT-BNG / SR device link table; Obtain OLT network management configuration information from multiple BNG / SR devices, process the OLT network management configuration information to obtain an OLT network management configuration information list, wherein the OLT network management configuration information list includes at least the identifier of each BNG / SR device and its corresponding virtual gateway address, and the virtual gateway address corresponds one-to-one with the OLT device connected to the BNG / SR device; Based on the virtual gateway address in the OLT network management configuration information list, a query is performed in the OLT network management configuration information list to obtain the static OLT-BNG / SR device link. The static OLT-BNG / SR device link is used to complete the first OLT-BNG / SR device link table to obtain the second OLT-BNG / SR device link table. In this context, BNG represents a broadband network gateway, SR represents a full-service router, ARP represents Address Resolution Protocol, OLT represents an optical fiber line terminal, and the OLT-BNG / SR device link table records the BNG / SR devices connected to each OLT device.

2. The method according to claim 1, characterized in that, After obtaining the second OLT-BNG / SR device link table, the method further includes: The second OLT-BNG / SR device link table is filtered to obtain the third OLT-BNG / SR device link table.

3. The method according to claim 1, characterized in that, The ARP configuration information is processed to obtain an ARP configuration information list, including: The ARP configuration information is extracted to obtain valid ARP configuration information, which includes at least the device name, device IP, MAC address, address type, and network management sub-interface. The valid ARP configuration information is filtered, and data with the address type of network management address is retained to obtain an ARP configuration information list.

4. The method according to claim 3, characterized in that, Before extracting the ARP configuration information, the method further includes: Based on the Apache Kafka framework, a compression algorithm is used to compress the ARP configuration information.

5. The method according to claim 1, characterized in that, The process of processing the OLT network management configuration information to obtain an OLT network management configuration information list includes: The OLT network management configuration information is extracted to obtain an OLT network management configuration information list, which includes at least the device name, device IP, network management address, virtual gateway address, and network management sub-interface.

6. The method according to claim 5, characterized in that, Before extracting the OLT network management configuration information, the method further includes: Based on the Apache Kafka framework, a compression algorithm is used to compress the OLT network management configuration information.

7. The method according to claim 1, characterized in that, The method for obtaining the virtual gateway address in the OLT network management configuration information list includes: The BNG device IP and network management sub-interface information in the first OLT-BNG / SR device link table are correlated and analyzed with the BNG device IP and network management sub-interface in the OLT network management configuration information list to obtain the virtual gateway address in the OLT network management configuration information list.

8. The method according to claim 2, characterized in that, The filtering operation includes: Remove devices in the second OLT-BNG / SR device link table that are in the engineering or offline status.

9. The method according to claim 4 or 6, characterized in that, The compression algorithm is the LZ4 compression algorithm.

10. A network logical link automatic association device, characterized in that, include: The ARP processing unit is configured to obtain ARP configuration information from multiple BNG / SR devices, process the ARP configuration information to obtain an ARP configuration information list, wherein the ARP configuration information list includes at least the identifier of each BNG / SR device and its corresponding MAC address, and the IP address corresponding to the MAC address is the OLT network management IP address of the OLT device connected to the BNG / SR device. The association unit is configured to obtain a local OLT device information table, associate the MAC address of each BNG / SR device in the ARP configuration information list with the OLT network management IP address in the local OLT device information table, and obtain a first OLT-BNG / SR device link table. The OLT processing unit is configured to acquire OLT network management configuration information on multiple BNG / SR devices, process the OLT network management configuration information to obtain an OLT network management configuration information list, wherein the OLT network management configuration information list includes at least the identifier of each BNG / SR device and its corresponding virtual gateway address, and the virtual gateway address corresponds one-to-one with the OLT device connected to the BNG / SR device; The completion unit is configured to query the OLT network management configuration information list based on the virtual gateway address in the OLT network management configuration information list to obtain static OLT-BNG / SR device links, and use the static OLT-BNG / SR device links to complete the first OLT-BNG / SR device link table to obtain the second OLT-BNG / SR device link table. In this context, BNG represents a broadband network gateway, SR represents a full-service router, ARP represents Address Resolution Protocol, OLT represents an optical fiber line terminal, and the OLT-BNG / SR device link table records the BNG / SR devices connected to each OLT device.

Images