WO2011023123A1

WO2011023123A1 - Method and system for monitoring ethernet automatic protection switching (eaps) ring network topology

Info

Publication number: WO2011023123A1
Application number: PCT/CN2010/076393
Authority: WO
Inventors: 黄山; 佘健
Original assignee: 迈普通信技术股份有限公司
Priority date: 2009-08-28
Filing date: 2010-08-26
Publication date: 2011-03-03
Also published as: CN101631053A; CN101631053B

Abstract

The present technical solution belongs to network monitoring technology. A method and a system for monitoring an Ethernet Automatic Protection Switching (EAPS) ring network topology are provided. The method includes: an arbitrary node device of the EAPS ring topology is set as a seed device; an EAPS topology monitoring device accesses the node device and obtains an EAPS ring which the node device is belonged, EAPS node in the ring, primary and secondary port information of the node, and the information of the device where the edge node is located in; then the collected topology information is analyzed and processed, and the dynamic rendering of the EAPS ring network topology collected this time is completed by a topology client. The obtaining and display of the whole EAPS ring network topology information is finally achieved by the unrepeated and successive access of the device where the edge node of the EAPS ring network is located in. The method can obtain the information of the whole EAPS network by only accessing partial device in the EAPS ring network, thereby reducing Simple Network Management Protocol (SNMP) message in the network efficiently, and increasing the topology renewal rate of the EAPS topology monitoring device greatly.

Description

EAPS ring network topology monitoring method and system

Technical field

The invention relates to network monitoring technology, in particular to Ethernet automatic protection switching (PCI Automatic Protection Switching (EAPS) ring network topology monitoring method and system.

Background of the invention

EAPS It is a link layer protocol specifically applied to the Ethernet ring network to prevent broadcast storms caused by data loops in the Ethernet ring network. When a link on the Ethernet ring is disconnected, the backup link can be quickly enabled to resume communication between nodes on the ring network. related A more detailed definition of EAPS technology can be found in RFC 3619 and is not described in detail here. The EAPS protocol itself does not have topology discovery capabilities, but for network administrators, it is necessary to understand the whole EAPS What ring structure of the ring network, the state of the ring, the protection instance of the ring, the nodes in the ring, the primary and secondary ports of the node, the connection order between the nodes, and the state of the nodes. When the ring network fails, it can be quickly located. Faulty node and faulty device. So, for the needs of network management, right Effective monitoring of the EAPS ring topology is important and necessary.

Summary of the invention

The technical problem to be solved by the present invention is to provide an EAPS. Ring network topology monitoring method and monitoring system for effective network management.

The present invention solves the technical problem, and the technical solution adopted is as follows.

An EAPS ring network topology monitoring system includes: an EAPS topology monitoring device and a topology client;

The EAPS topology monitoring device is configured to connect an EAPS on an EAPS ring in the EAPS ring network The node is used as a seed device, and the topology information of the EAPS ring in which the seed device is located is obtained from the seed device, and the topology information is provided to the topology client for displaying the topology view of the EAPS ring.

An EAPS ring topology monitoring method includes:

The EAPS topology monitoring device will have an EAPS on an EAPS ring in the EAPS ring network The node is used as a seed device, and the topology information of the EAPS ring in which the seed device is located is obtained from the seed device, and the topology information is provided to the topology client for displaying the topology view of the EAPS ring.

The technical solution provided by the embodiment of the present invention implements EAPS The collection and graphical display of the network topology, compared with the general Layer 2 network topology discovery method, the solution of the present invention only needs to access some devices in the EAPS ring network to obtain the entire EAPS. The network information can effectively reduce the number of packets on the network, such as SNMP packets, greatly improving the topology update speed of the network management software.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural diagram of a system of an embodiment;

2 is a timing diagram of EAPS topology collection and display according to the present invention;

FIG. 3 is a schematic diagram of an EAPS ring network topology of an embodiment.

Mode for carrying out the invention

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

The basic idea of the present invention is: 1) using the device where any node in the EAPS ring topology is located as a seed device, EAPS The topology monitoring device accesses the device and obtains the EAPS ring to which the device node belongs, the EAPS node in the ring, and the primary and secondary port information of the node, if the EAPS A ring topology consists of two or more rings. It also needs to obtain the edge node on the ring, that is, the node that the ring intersects with another ring, the device information, and then analyze and collect the collected topology information, and the topology client Complete this collection Dynamic drawing of the EAPS ring topology. By repeatedly accessing the devices of the edge nodes in the EAPS ring topology, the entire EAPS ring network topology information is obtained and displayed. 2 Automatically collect EAPS ring topology information by user manual mode or EAPS topology monitoring device, and update EAPS topology view in real time, so that EAPS can be reflected in time and accurately. Changes in the ring topology. 3) When the EAPS ring network fails, the collected topology information may be incomplete, and the EAPS topology monitoring device accesses the EAPS of the fault segment in turn. The device where the node is located collects the status of the faulty node and the link state between the nodes, supplementing EAPS The topology information of the fault segment of the ring network enables the network administrator to accurately and intuitively observe the faulty node and the faulty link in the topology view presented by the topology client. 4) EAPS topology monitoring device receives and stores EAPS ring status, node status, and connection status change information, notify the topology client to update the EAPS ring topology view in time, and the network administrator can query and monitor the entire EAPS in real time. The topology change of the ring network.

The EAPS ring network topology monitoring system of the present invention includes an EAPS topology monitoring device and a topology client.

EAPS The topology monitoring device may include one or more modules, which may be implemented in one device or distributed among multiple devices. EAPS The topology monitoring device may be a module on the network management workstation or an independent network management workstation. The present invention does not limit the specific implementation form of the EAPS topology monitoring device.

The topology client can communicate with the EAPS topology monitoring device, receive the EAPS status change message, and obtain the changed EAPS. Ring topology information and display it on a display. The topology client can be a separate software running on a client device (such as a normal PC) or a module of the network management client software.

An EAPS node can obtain other node information in the same ring according to the EAPS protocol and save it in the EAPS. The storage module of the node, for example, can be saved in the management information base (MIB) of the EAPS node. As for the information of the edge nodes, the EAPS protocol itself does not provide Layer 2 topology collection, EAPS. The node may collect the edge node information according to the scheme provided by the invention patent application with the publication number CN101483608.

The EAPS topology monitoring device and each EAPS node can communicate via a network connection. EAPS topology monitoring device can be based on The information of the EAPS node, such as the IP address, accesses the device where the EAPS node is located, and obtains the EAPS ring to which the node saved by the device belongs, and other EAPS in the ring. The node and the primary and secondary port information of the node. There are many ways in which an EAPS topology monitoring device can access a device on which an EAPS node resides. For example, remote data access technologies that can invoke network protocols can be utilized, for example. Telnet or http can also use other technologies, such as various network management technologies, etc., and will not be described here. When the network management workstation uses the SNMP protocol to manage each EAPS device, The EAPS topology monitoring device can access EAPS through the access interface provided by the SNMP module in the EAPS node. The storage device of the node. When other network management protocols are used, the means of implementation are similar, and will not be described here.

Example 1

As shown in Figure 1, the EAPS ring topology monitoring system consists of the following four modules:

EAPS topology discovery module: used to collect EAPS ring topology information based on seed device information, analyze EAPS Ring topology information and form ring topology data. According to another embodiment of the present invention, the EAPS topology discovery module can also call the data processing module to analyze EAPS. Ring topology information and form ring topology data.

Data processing module: Provides data access interfaces for other modules, stores and retrieves EAPS ring topology information.

Fault management module: Used to notify EAPS when the device where the EAPS node is located is found to be faulty or when the fault is recovered. The alarm message of the change of the topology status generates a system alarm event, so that the topology view can be updated in time. EAPS The alarm information sent by the node can be a customized message, or can be implemented by using an existing message, such as a Simple Network Management Protocol (SNMP) Trap message. The system alarm event can be EAPS The topology discovery module or the data processing module processes, for example, invoking the data processing module to establish a topology collection task, and calling the EAPS topology discovery module to collect topology information. The data processing module analyzes and processes the collected topology information. The state of the EAPS ring, node, and port changes, and the topology information stored in the data processing module is updated. After the topology information stored in the data processing module is updated, the data processing module sends a notification to the topology client EAPS The status change message causes the topology client to redraw the EAPS ring topology based on the updated topology information.

Topology client: Receives the seed device information input by the user and displays the EAPS topology view.

The communication link between the modules is shown in Figure 1. EAPS The topology discovery module can exchange information with the data processing module and the topology client. Information exchange between the fault management module and the data processing module and the topology client is also possible. The topology client communicates with the data processing module.

The following uses the SNMP protocol for EAPS The monitoring process when the ring network performs management is taken as an example to describe the monitoring method of the present invention in detail. The timing of the monitoring method steps in this example is shown in Figure 2.

1. When the user adopts the manual refresh mode, the topology client receives the EAPS device IP input by the user. Address; can also receive SNMP parameter settings manually set by the user, such as SNMP version number V1 or V2 or V3, and community name and password (see SNMP) a description of the agreement).

2. The topology client uses the EAPS device input in step 1 above as the seed device to request the EAPS topology discovery module to be created. EAPS topology information collection task (also known as topology collection task or EAPS network discovery task).

3, EAPS topology discovery module scheduling topology collection tasks, through SNMP Access the seed device associated with the topology collection task to obtain the topology information of the EAPS ring where the device resides.

4. The EAPS topology discovery module calls the data processing module to analyze and extract all the EAPS seed devices collected this time. The information of the EAPS ring and all its EAPS nodes, including the device information of the EAPS node, the connection relationship between the ring, the node and the node, the primary and secondary port information, etc., are stored in the data processing module. when When the EAPS topology monitoring device is a module in the network management workstation, the information storage function of the data processing module can be implemented by the network management database in the network management workstation.

5. The data processing module notifies the topology client to update the EAPS topology view.

6. The data processing module creates an EAPS topology information collection task for the device where the newly discovered EAPS edge node is located, and repeats 3 4 and 5 until all edge nodes are accessed, and finally the acquisition and display of the entire EAPS ring topology information is achieved.

The EAPS ring topology shown in Figure 3 is taken as an example for further description.

The EAPS ring topology consists of 1 primary ring (ring 1) and one sub-ring (ring 2) The main ring and the sub-ring have control nodes and transmission nodes, and the primary ring and the sub-ring intersect at one edge node and one auxiliary edge node (edge node m).

1. The user enters the IP address of the device where the primary node of the EAPS primary ring (ring ID is 1).

2. The EAPS topology discovery module creates a topology collection task for the device where the master node resides.

3. The EAPS topology discovery module collects EAPS from the seed device. Ring topology information. When collecting from the device where the master node is located, only one topology (with ring ID 1) can be collected: including domain ID, ring ID, and control VLAN. , ring level, number of ring switching, ring status, port blocking status, all nodes on the ring, and primary and secondary ports of the node. This step can be done through the SNMP protocol and EAPS. To achieve, belongs to the prior art, and will not be described here.

4. The data collected and analyzed from the primary node has EAPS ring related information with ring ID 1, which is the domain ID and ring mentioned above. ID, control VLAN, ring level, ring switching times, ring status, port blocking status, all nodes on the ring, including the primary node, transit node 1, transport node 2, transport node m, transport node n And the primary and secondary ports of each node; at the same time, the information that the transit node 2 is an edge node can be obtained (for example, the node type is an edge node, and the identifier of the device where the edge node is located, such as MAC) Address, etc.). From the collected data analysis, to obtain the entire EAPS ring topology, it is necessary to obtain the information of the EAPS ring with the ring ID of the device of the edge node and the node in the ring.

5. The data processing module notifies the topology client to display all nodes of the ring 1 (ring ID 1) and the connections between the nodes.

6. In step 4, you can know that the transit node 2 of ring 1 is an edge node, if the device can be EAPS Topology monitoring device access (for example, when the device can be managed by SNMP protocol, the EAPS topology monitoring device can access the device through SNMP), and then the transit node 2 The device is a seed device. Continue to perform topology information collection (also known as network discovery). Repeat steps 3 and 4 to obtain the EAPS ring with ring ID 2 and the node in the ring (s master node, s The information of the transfer node) completes the collection and display of all topology information of the EAPS ring network shown in Figure 2.

Example 2

Time-aware EAPS topology changes and timely update the network topology displayed by the topology client.

In addition to the latest EAPS available through manual refresh In addition to the topology of the ring network and the update of the topology client, the system can also access the network periodically (the specific timing value can be modified) to accurately reflect the changes in the EAPS ring topology. The specific steps are as follows.

1. After the EAPS ring topology monitoring system is started, the data processing module of the EAPS topology monitoring device reads the timing configuration and completes The EAPS network periodically accesses the scheduling task and initializes the timer.

2. After the timer expires, the EAPS topology discovery module creates an EAPS topology information collection task. According to an embodiment of the invention, The EAPS topology discovery module can create a topology collection task for the preset seed device information in the EAPS topology monitoring device, and add the created task to the topology information collection task queue. According to another embodiment of the invention, The EAPS topology discovery module can also create topology collection tasks for all edge node devices and master node devices in the EAPS ring network that have been saved in the data management module, and add the created tasks to EAPS. Topology information collection task queue.

3, EAPS topology discovery module scheduling EAPS topology information collection task queue for each task EAPS The network finds the EAPS ring topology information of each edge node and the master node.

4. The EAPS topology discovery module calls the data processing module to analyze and extract the collected topology information. If you find new or deleted EAPS Ring, EAPS node or EAPS port (ie EAPS) The node's port), or its state changes (for example, through the collected ring state, port blocking state detected state change), update the corresponding data in the data processing module. When the data in the data processing module is updated, the data processing module sends the data to the topology client EAPS topology change message.

5. The topology client receives the EAPS topology change message and updates the topology view in time. Here, EAPS The topology change message can be delivered by the instant message notification technology, so that the topology client can update the topology view immediately when the topology changes. EAPS The topology change message may include only one update notification, and the topology client reads the topology information stored by the data processing module and displays it after receiving the update notification. EAPS The topology change message may also include all the topology information or only the topology information that has changed. After receiving the EAPS topology change message, the topology client directly updates the displayed topology according to the topology information.

6. Create an EAPS topology discovery task for these devices for the newly discovered EAPS edge nodes in the topology information collection process. 3, 4, and 5 until all edge nodes are accessed, and finally the entire EAPS ring topology information is updated.

7. Wait, if the time is up, return to step 2.

Example 3

When a ring is faulty, the topology view can accurately identify the link connection between the faulty node and the faulty node.

1. In the execution of a network discovery task, if an EAPS is found The status of the ring is faulty. At this time, the network discovery task may only collect part of the EAPS node information of the fault ring.

Here, EAPS The state of the ring can be determined according to the state of the ring in the collected topology information. The collected ring state can be: a complete state or a fault state.

If there is only 1 faulty device in the ring or 1 A faulty link can determine the location of the fault based on the topology information of the collected loop. The relevant topology information for the failed node or the failed link will be provided to the topology client, which will indicate the failed node or the failed link in the topology view with a striking color.

If the faulty device or faulty link in the ring is more than 1 The collected topology information may be incomplete, and the topology between the fault locations may not be collected. Then, the following processing is performed.

2, EAPS The topology discovery module calls the data processing module, analyzes and extracts the collected topology information of the fault ring part node, and updates the topology information stored in the data processing module. The data processing module notifies the topology client to update the fault ring partial topology.

3. The data processing module simultaneously compares and analyzes the historical data of the previously stored topology information to obtain the EAPS. Nodes in the ring that may be faulty, and generate network access tasks for the devices where these nodes are located and join the network discovery task queue. Specifically, EAPS The method for determining a node that may be faulty in the ring may be: comparing historical data with the topology information collected this time, and having EAPS that is not included in the history information collected in the history data. The node is determined to be a node that may be faulty.

In the case that the topology discovery process is the first topology discovery process, the data processing module may not save the historical data if the faulty device or the faulty link in the ring is more than 1 It is possible to obtain only partial topology information. In this case, the data processing module notifies the topology client to display the collected topology information. After the ring failure is recovered, the task is collected by performing a periodic topology or received by the fault management module. The topology collection task performed after the EAPS topology status change alarm message sent by the EAPS node can complete the topology.

4 By accessing all the nodes that may be faulty, all the topology information of the entire fault ring can be collected, and the data processing module can analyze the specific EAPS node and the EAPS port where the fault occurs on the ring.

5 The topology information such as the faulty node and the port in the fault ring will notify the topology client and indicate the link between the node in the fault ring and the node in a conspicuous color, such as red, in the topology view.

Example 4

Monitor status changes of EAPS rings, nodes, and ports in a timely manner.

1. If the EAPS ring fails, the EAPS node status changes, the EAPS port UP or DOWN, EAPS When the port is blocked or unblocked, the device where the EAPS node is located will send an alarm message to notify the EAPS topology monitoring device. For example, an EAPS node can generate and issue SNMP protocol traps. The message is used as the alarm message. Preferably, in order to enable the EAPS topology monitoring device to know the change of the EAPS ring topology in time, the alarm message can be transmitted by using instant communication technology.

2. The fault management module of the EAPS topology monitoring device. When a trap message is used as the alarm information, it is also called Trap. The processing module) receives the alarm message and invokes the data processing module to establish a topology collection task. The EAPS topology discovery module performs a topology collection task to collect topology information, and invokes the data processing module to analyze and process the EAPS. The state of the ring, node, and port changes, the topology information stored in the data processing module is updated, and the EAPS state change message is sent to the topology client.

3 The data processing module notifies the alarm message system to generate an alarm message, and the network management personnel can query the recorded alarm message through the client to keep track of the change of the EAPS ring network status.

The alarm message system can be a system that can communicate with each other independently of the EAPS topology monitoring system; or it can be EAPS A module in a topology monitoring device.

4. The topology client receives the EAPS status change message and timely reflects the EAPS in the EAPS topology view. Changes in the ring topology.

EAPS The topology monitoring device can notify the topology client in real time according to the change of the topology information stored in the data processing module, and the topology client redraws the ring network topology according to the changed topology information.

Example 5

The EAPS topology monitoring system of the present invention can also be based on workstations / The client's network management system can be carried on the server and the terminal client respectively; it is used to enable a hardware server and a common computer terminal to complete the above described method. When EAPS When the topology monitoring system is implemented by a computer program product, such as network management software, the EAPS topology monitoring method of the present invention may include the following steps:

a. The network management software client receives the IP address of the seed device input by the user. The network management workstation with the address and the network management station obtains the EAPS ring where the seed device is located and the information of all EAPS nodes on the ring through the network management protocol;

b. The network management workstation analyzes and extracts the EAPS ring and its EAPS found in step a. The information of the node is saved in the network management database;

c. The network management software client displays the devices in the EAPS ring and the EAPS configured in the device in the EAPS topology view. Node and status, connection and connection status between EAPS nodes, and status of EAPS ring;

d. The network management workstation repeats steps b and c by accessing the device where the EAPS edge node saved in step b is located. Finally, the acquisition and display of the entire EAPS ring topology information is realized.

The beneficial effect of the invention is that EAPS is realized The collection and graphical display of the network topology. Compared with the general Layer 2 network topology discovery method, the present invention is characterized in that only a part of devices in the EAPS ring network need to be accessed to obtain the entire EAPS. The network information can effectively reduce the number of packets on the network, such as SNMP packets, greatly improving the topology update speed of the network management software. At EAPS If the ring network is faulty and the edge node collection topology is incomplete, you can further complete the topology by accessing other devices in the fault ring to accurately locate the fault point. Manually refresh and receive EAPS through the network administrator The information sent by the node device is updated and periodically polled to facilitate the network administrator to grasp the faults and topology changes of the EAPS ring topology in a timely, reliable and accurate manner.

The above is only the embodiment of the process and method of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included in the present invention. Within the scope of protection.

Claims

1. EAPS ring network topology monitoring system, including: EAPS topology monitoring device and topology client;

The EAPS topology monitoring device is configured to connect an EAPS on an EAPS ring in the EAPS ring network The node is used as a seed device, and the topology information of the EAPS ring where the seed device is located is obtained from the seed device, and the topology information is provided to the topology client for displaying the EAPS. The topology view of the ring.
The EAPS ring network topology monitoring system according to claim 1, wherein the EAPS topology monitoring device comprises: EAPS a topology discovery module and a data processing module; wherein

The EAPS topology discovery module is configured to collect topology information of the EAPS ring according to information of the seed device, and invoke the data processing module to analyze the EAPS ring topology information to obtain topology data of the EAPS ring, and storing the topology information in a data processing module;

The data processing module is configured to provide a data access interface, store and retrieve EAPS The topology information of the ring network notifies the topology client to display the topology view according to the topology data.
3. The EAPS ring network topology monitoring system according to claim 2, wherein

The topology client is further configured to receive seed device information input by a user, and provide the seed device information to the EAPS Topology discovery module;

The EAPS topology discovery module is further configured to determine the seed device according to the seed device information provided by the topology client.
4. The EAPS ring network topology monitoring system according to claim 2, wherein

The data processing module is further configured to determine the EAPS ring and the second EAPS according to the topology information of the EAPS ring The edge node at the intersection of the rings;

The EAPS topology discovery module is further configured to use the edge node determined by the data processing module as a seed device.
5. The EAPS ring network topology monitoring system according to claim 2, wherein

The data processing module is further configured to read a timing configuration in the EAPS ring topology monitoring system, and start a timer;

The EAPS topology discovery module is further configured to: according to the EAPS when the timer expires The seed device information preset in the topology monitoring device determines the seed device, or the EAPS in the second topology information previously saved in the data management module All primary and edge nodes in the ring are identified as seed devices.
6. The EAPS ring network topology monitoring system according to claim 2, wherein said EAPS The topology monitoring device further includes:

a fault management module, configured to receive an alarm message sent by an EAPS node in the EAPS ring network when the EAPS ring status changes, and invoke EAPS Topology discovery module;

The EAPS topology discovery module is further configured to use the EAPS The seed device information preset in the topology monitoring device determines the seed device, or the EAPS in the second topology information previously saved in the data management module All primary and edge nodes in the ring are identified as seed devices.
The EAPS ring network topology monitoring system according to claim 2 or 6, wherein

The data processing module is further configured to compare the previously stored second topology information and the topology information, where the second topology information is included, and the topology information is not included. The EAPS node in the EAPS ring is determined as an alternate fault node and the EAPS node is used as a seed device.
8. The EAPS ring network topology monitoring system according to claim 7, wherein:

The data processing module is further configured to determine the EAPS according to the previously stored second topology information and the topology information and topology information acquired from the candidate faulty node. A faulty node or a faulty link in the ring, notifying the topology client to display topology information related to the faulty node or the faulty link;

The topology client is further configured to mark the faulty node or faulty link in a topology view.
9. The EAPS ring network topology monitoring system according to claim 2, wherein

The data processing module is further configured to determine the EAPS according to the previously stored second topology information and the topology information. A faulty node or a faulty link in the ring, notifying the topology client to display topology information related to the faulty node or the faulty link;

The topology client is further configured to mark the faulty node or faulty link in a topology view.
10. EAPS according to any of claims 2, 8 and 9. The ring network topology monitoring system is characterized in that the data processing module is configured to notify the topology client by using an instant communication technology.
11. The EAPS ring network topology monitoring method, which is characterized by:

The EAPS topology monitoring device will have an EAPS on an EAPS ring in the EAPS ring network The node is used as a seed device, and the topology information of the EAPS ring where the seed device is located is obtained from the seed device, and the topology information is provided to the topology client for displaying the EAPS. The topology view of the ring.
The EAPS ring network topology monitoring system according to claim 11, wherein the EAPS topology monitoring device will be EAPS An EAPS node on an EAPS ring in the ring network as a seed device includes:

The topology client receives seed device information input by a user, and provides the seed device information to the EAPS Topology monitoring device block;

The EAPS topology monitoring device determines the seed device according to the seed device information provided by the topology client.
The EAPS ring network topology monitoring system according to claim 11, wherein the EAPS topology monitoring device will be EAPS An EAPS node on an EAPS ring in the ring network as a seed device includes:

The EAPS topology monitoring device determines the EAPS ring and the second EAPS according to the topology information of the EAPS ring The edge node at the intersection of the rings uses the edge node as a seed device.
The EAPS ring network topology monitoring system according to claim 11, wherein the EAPS topology monitoring device will be EAPS An EAPS node on an EAPS ring in the ring network as a seed device includes:

The EAPS topology monitoring device reads the EAPS The timing configuration in the ring network topology monitoring system starts a timer; when the timer expires, the seed device is determined according to the preset seed device information, or the EAPS in the previously saved second topology information is used. All primary and edge nodes in the ring are identified as seed devices.
The EAPS ring network topology monitoring system according to claim 11, wherein the EAPS topology monitoring device will be EAPS An EAPS node on an EAPS ring in the ring network as a seed device includes:

The EAPS topology monitoring device receives an EAPS node in the EAPS ring network at EAPS The alarm message sent when the ring status is changed, the seed device is determined according to the preset seed device information, or the EAPS in the previously saved second topology information is All primary and edge nodes in the ring are identified as seed devices.
The EAPS ring network topology monitoring system according to claim 11 or 15, wherein the EAPS topology monitoring device An EAPS node on an EAPS ring in the EAPS ring network as a seed device includes:

The EAPS topology monitoring device compares the previously stored second topology information and the topology information, and the second topology information is included in the topology information. The EAPS node in the EAPS ring is determined as an alternate fault node and the EAPS node is used as a seed device.
The EAPS ring network topology monitoring system according to claim 16, further comprising:

The EAPS topology monitoring device determines the EAPS according to the previously stored second topology information and the topology information and topology information acquired from the candidate faulty node. A faulty node or a faulty link in the ring, notifying the topology client to display topology information related to the faulty node or the faulty link;

The topology client is further configured to mark the faulty node or faulty link in a topology view.