KR101685892B1 - Virtual device network system - Google Patents

Virtual device network system Download PDF

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Publication number
KR101685892B1
KR101685892B1 KR1020150041686A KR20150041686A KR101685892B1 KR 101685892 B1 KR101685892 B1 KR 101685892B1 KR 1020150041686 A KR1020150041686 A KR 1020150041686A KR 20150041686 A KR20150041686 A KR 20150041686A KR 101685892 B1 KR101685892 B1 KR 101685892B1
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virtual
snmp
equipment
agent
virtual equipment
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KR1020150041686A
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Korean (ko)
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KR20160115037A (en
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이승호
이창근
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주식회사 다산네트웍스
주식회사 다산네트웍솔루션즈
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02—Standardisation; Integration
    • H04L41/0213—Standardised network management protocols, e.g. simple network management protocol [SNMP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02—Standardisation; Integration
    • H04L41/024—Standardisation; Integration using relational databases for representation of network management data, e.g. managing via structured query language [SQL]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/02—Standardisation; Integration
    • H04L41/0246—Exchanging or transporting network management information using the Internet; Embedding network management web servers in network elements; Web-services-based protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/22—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks comprising specially adapted graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/50—Testing arrangements

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Human Computer Interaction (AREA)
  • Computer And Data Communications (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

A virtual equipment network system for testing a network management system using a Simple Network Management Protocol (SNMP) is disclosed. This virtual equipment network system includes a virtual equipment manager defining virtual equipment to constitute a test network, and a virtual equipment agent operating a plurality of virtual equipment according to definition contents of the virtual equipment manager.

Figure R1020150041686

Description

{Virtual device network system}

The present invention relates to a technique for testing a newly developed or added network management system.

The network management system is a system that helps to solve the problem by monitoring the state and the failure of the network operating the large equipment and reporting it to the operator. Such a network management system is required to be tested to see whether it operates normally and performance when a development or a function is added. This ensures the stability of the product and provides performance information that can be provided to the customer when using specific hardware.

However, a large scale test network is required for the function and performance test of the network management system, but it is impossible to construct a test network in terms of manpower, time, and cost. Therefore, even if a large-scale test network is not configured, some tests are performed in terms of functions, but actual tests are not performed in terms of performance (device performance monitoring, event processing performance, and the like).

Korean Patent Registration No. 10-1490316 (issued on February 11, 2015)

It is an object of the present invention to provide a technical solution for ensuring substantial functional and performance testing of a network management system.

A virtual equipment network system for testing a network management system using a simple network management protocol (SNMP) according to one aspect includes a virtual equipment manager and a virtual equipment agent. The virtual device manager defines a virtual device to constitute a test network. The virtual device agent operates a plurality of virtual devices according to the definition of the virtual device manager.

According to one aspect, the virtual device manager defines an SNMP MIB compiler, which compiles a management information base (MIB) provided by the equipment manufacturer, and a virtual device, and compiles the MIB file name and object identifier OID) to manage definition content.

According to one aspect, the definition unit includes a MIB value definition unit for defining values of SNMP (Simple Network Management Protocol) data to be provided by the virtual equipment, a trap definition unit for defining SNMP traps to be generated in the virtual equipment, A virtual device definition section for defining SNMP devices and SNMP traps to define the virtual devices, and a virtual device agent defining section for defining the virtual device agents so that the defined virtual devices are operated by the virtual device agents.

According to one aspect, the MIB value definition unit may define a value input from a user as a default value or define a value collected from an actual device as a default value.

According to an aspect, the trap definition unit may define SNMP traps generated according to user input as SNMP traps to be generated in the virtual equipment, or SNMP traps collected from the actual equipment as SNMP traps to be generated in the virtual equipment.

According to one aspect, the virtual device definition unit defines a device manufacturer and a model and defines them as virtual devices. In the same model, a plurality of sub-virtual devices are defined to generate different SNMP data and SNMP traps .

According to an aspect, a virtual equipment agent includes a packet capture / transmission module that captures or transmits a packet, and an agent processing unit that generates a virtual equipment process according to the virtual equipment agent definition contents. The virtual equipment process includes a packet capture / The transmission module can send and receive packets with the network management system.

According to an aspect of the present invention, the virtual equipment agent accesses the virtual equipment manager and transmits a list of interface information of the station on which the virtual equipment agent is running to the virtual equipment manager. The virtual equipment agent definition unit includes a virtual equipment, The SNMP agent sets the interface MAC address of the station to be used by the packet capture / transmission module, and the agent processing unit sets the IP address of the IP address range according to the defined contents of the definition unit, the routing table, the trap host list for generating the SNMP trap, You can create as many virtual machine processes as you want and set the IP address of the virtual machine, the routing table to be used by the virtual machine, the SNMP community of the virtual machine, the interface MAC address, SNMP data, SNMP traps and trap host list for packet capture and transfer .

According to one aspect, a virtual equipment process can execute an ARP (Address Resolution Protocol) process, an ICMP (Internet Control Message Protocol) process, and an SNMP process in sequence.

According to the present invention, a device to be tested can be easily configured through a graphical user interface, and a large number of test networks can be configured with low cost and time.

① It is possible to configure the equipment within a short period of time by importing the data to be provided from the actual equipment without creating all the data.

② Up to several thousand virtual machines can be executed per agent, which makes it possible to configure a large scale test network with a small number of agents.

③ All defined data can be saved as a file, and data defined by a specific user can be used immediately by other users.

④ You can demonstrate network management system by configuring network without actual equipment.

1 is a diagram illustrating a virtual equipment network system according to an exemplary embodiment of the present invention.
2 is a block diagram of a virtual equipment agent according to one embodiment.
3 is a diagram illustrating an MIB compilation UI according to an exemplary embodiment of the present invention.
4 is a diagram illustrating a UI in which a user can define an MIB value to be provided in a virtual device according to an exemplary embodiment of the present invention.
5 is a diagram illustrating a UI for defining a structure of a Trap periodically generated in a virtual machine according to an embodiment.
6 to 10 are views illustrating a UI for defining a device to be used as a virtual device according to an exemplary embodiment.
11 to 13 are views showing a UI for managing a virtual equipment agent to operate the virtual equipment according to an embodiment.
14 is a diagram illustrating a virtual equipment agent UI according to an embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and further aspects of the present invention will become more apparent from the following detailed description of preferred embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a virtual equipment network system according to an embodiment. FIG. 2 is a block diagram of a virtual equipment agent according to an embodiment. Virtual equipment network system is a system that can configure a large number of virtual equipment test network to test network management system using Simple Network Management Protocol (SNMP). The virtual equipment network system includes a virtual equipment manager 100 and a virtual equipment agent 200. The virtual device manager 100 defines virtual devices to constitute a test network. The virtual device manager 200 defines basic information for operating the virtual devices and provides them to the virtual device agents 200. The virtual machine agent 200 operates a plurality of virtual machines according to the definition of the virtual machine manager 100. That is, a plurality of virtual equipment processes are created and executed. Each virtual machine process exchanges data with the network management system 300 via SNMP. In this way, the virtual equipment network system is a method of configuring a test network using virtual equipment instead of an actual equipment, so that virtual equipment can be executed up to several thousand units per virtual equipment agent. Therefore, a large number of agents can constitute a large-scale test network.

According to an aspect, the virtual equipment manager 100 includes an SNMP MIB compiler 110 and a definition unit 120. [ Since virtual appliances provide data through SNMP, it is necessary to define the SNMP data to be provided by the virtual appliance. Therefore, it is necessary to define and set a value for each object identifier (OID). If OID is used to define it, readability becomes poor. Therefore, if MIB name is used by compiling a management information base (MIB) file, It gets easier. The SNMP MIB compiler 110 compiles the MIB provided by the real equipment manufacturer and stores the MIB in a file, and provides the MIB name and the OID for use in the definition unit 120. The definition unit 120 defines a virtual device so that the virtual equipment agent 200 can operate the virtual device. The definition unit 120 stores definition contents in the definition file database 170 using the MIB name and the OID. In one embodiment, the user may directly input a value to be defined in the definition unit 120 through the user interface 150, and may set or select one of the provided values.

According to an aspect, the definition unit 120 includes an MIB value definition unit 121, a trap definition unit 122, a virtual device definition unit 123, and a virtual device agent definition unit 124. The MIB value defining unit 121 defines a basic value of SNMP data (SNMP MIB data) to be provided by the virtual equipment. The default value can be divided into a fixed value and a variable value. However, since the actual values of data such as traffic usage, CPU, and memory are continuously changed, dynamic SNMP data is provided through the MIB value definition unit 121 You can set it to. In the case of data change, the value is automatically changed by specifying the range of the change value and the change period.

The basic values of the SNMP data defined in the MIB value defining unit 121 are not set according to the manufacturer and the model but can be commonly applied to all the virtual machines. If a different value is set in the virtual device definition unit 123, the fixed value defined in the MIB value definition unit 121 is ignored. However, when the variable value is set, the value set in the virtual device definition unit 123 is ignored and the variable value is used.

The trap definition unit 122 defines an SNMP trap (Trap) to be generated in the virtual equipment. SNMP Trap is used when the equipment informs the management system of its faults and conditions. The network management system 300 receives an SNMP Trap, displays an alarm to the administrator, and changes the state of the network. Accordingly, the virtual device must be able to generate a specific SNMP Trap, and thus, the trap definition unit 122 is responsible for defining the SNMP Trap to be generated in the virtual device. In one embodiment, the trap definition unit 122 may define an SNMP Trap type, a specific code, a Trap OID, an OID to be bound to a Trap, and the like.

If SNMP data and SNMP Trap are defined, you must define the virtual equipment to be provided. The virtual device definition unit 123 provides a virtual device definition function. First, the virtual device defining unit 123 registers a manufacturer and a model of a virtual device to be defined for management, and defines a virtual device. The virtual device definition unit 123 can define several SNMP devices under the same model so that different SNMP data and SNMP Trap can be generated even in the same model depending on the situation. Therefore, the virtual device definition unit 123 can define a plurality of virtual devices under the same model.

The virtual device definition unit 123 provides a function of setting / selecting SNMP data and SNMP Trap to be provided by the virtual device. The user can directly input the SNMP value to be provided in the virtual device or can collect and set the SNMP data in the real device 400 through the SNMP import 130. The user can select only the SNMP data to be provided from the virtual device . In addition, the user can directly generate an SNMP Trap to be generated in the virtual device or set an SNMP Trap collected from the real device 400 through the TRAP Import (140). In addition, only the SNMP Trap You can choose. The virtual device definition unit 123 can set / select SNMP data and SNMP Trap by allowing the user to set / select SNMP data and SNMP Trap.

Meanwhile, it is necessary to provide a definition of the virtual equipment to be operated by the virtual equipment agent 200 and to define the virtual equipment agent 200 in order to manage it. The virtual device agent definition unit 124 provides such functions and includes a virtual device definition to be operated by the virtual device agent 200, an IP address range, a routing table to be used by the virtual device, a Trap host list to generate an SNMP Trap, The SNMP community of the device, and the interface MAC address of the station to be used when the virtual device captures / transmits the packet. The term " station " refers to communication equipment located on each node, and refers to a station in which the virtual equipment agent 200 is installed. The interface information list of the station where the virtual equipment agent 200 is installed is notified to the virtual equipment manager 100 when the virtual equipment agent 200 is connected to the virtual equipment manager 100 through the agent communication module 160 .

The virtual device manager 100 waits for a specific TCP port, for example, the TCP 30562 port, in the agent communication module 160 so that the virtual appliance agent 200 can access the virtual appliance agent 200. When the virtual appliance agent 200 accesses, And the basic information of the virtual equipment agent 200 is displayed in the agent definition unit 124. The agent communication module 160 is a communication path between the virtual machine manager 100 and the virtual machine agent 200. The virtual machine manager 100 transmits commands such as virtual machine information and virtual machine start / Agent 200 transmits the status of the agent and the virtual device to the virtual device manager 100. [

The virtual equipment agent 200 is a part where the virtual equipment actually operates. The virtual equipment agent 200 tries to access the virtual equipment manager 100 through the TCP 30562 port. When it is connected to the virtual device manager 100, it transmits the basic information of the agent and the interface list of the station to the virtual equipment manager 100. The virtual machine manager 100 transmits a start command to the virtual machine agent 200 together with the information defined by the virtual machine agent defining unit 124 to operate the virtual machine agent 200. [

The virtual equipment agent 200 includes a packet capture / transmission module 210 and an agent process 220. The packet capture / transmission module 210 provides a packet capturing and transmission function, which is a kind of socket (referred to as 'CaptureSocket') serving as a UDP (User Datagram Protocol) or ICMP (Internet Control Message Protocol) socket. The virtual device uses this socket to provide functions such as ICMP response, handling of SNMP Set and Get, and user-specified SNMP Trap generation. CaptureSocket recognizes the captured packet as received data, and uses the packet transmission function when transmitting. The packet capture / transmission module 210 captures / transmits packets through an interface using an interface MAC address for packet capture / transmission. As described above, the packet capture / transmission module 210 operates as if it is a socket, and provides the captured packet to the virtual device as it is received through the socket, or transmits the packet to be transmitted from the virtual device to the network management system 300, As shown in FIG.

The agent processing unit 220 executes a virtual machine operation in response to a start command from the virtual machine manager 100. The agent processing unit 220 generates a virtual device corresponding to an IP address in an IP address range defined by the virtual device agent defining unit 124, that is, a virtual equipment process 230, and obtains an IP address, a routing table, an SNMP community, / Set the interface MAC address, SNMP data, SNMP TRAP, Trap host list for transmission and start virtual equipment process (230). Also, the agent processing unit 220 manages the list of virtual equipment processes 230 and provides start / stop functions of specific virtual equipment requested by the virtual equipment agent 200.

The virtual equipment process 230 first creates and starts the ARP process 240. The ARP process 240 requests the packet capture / transmission module 210 to receive the ARP packet when it is captured, or transmits the ARP packet to the network via the packet capture / transmission module 210. In addition, the ARP process 240 enables the L2 communication by responding to the ARP request for the IP address of the virtual device using the CaptureSocket in response to the interface MAC address for packet capture / transmission, Lt; RTI ID = 0.0 > station < / RTI > And it manages the MAC address for the IP address on the LAN so that it can be used for packet transmission.

The virtual machine process 230 then starts by creating an ICMP process 250. The ICMP process 250 requests the packet capture / transmission module 210 to receive ICMP packets when they are captured, or to transmit ICMP packets. In the network management system 300, the ICMP process 250 receives and responds to the ping for checking the connection status with the virtual device.

The virtual machine process 230 then creates and starts the SNMP agent 260. The SNMP agent 260 requests the packet capture / transmission module 210 to receive the SNMP packet or to transmit the SNMP packet when the SNMP packet is captured. The virtual equipment process 230 sets SNMP data and SNMP Trap defined by the virtual equipment agent 200 to the SNMP agent 260. SNMP data is managed in tree form according to OID. The SNMP agent 260 checks the SNMP OID requested by the network management system 300 and transmits a value of the SNMP data to the network management system 300. When the SNMP Trap is set to all Trap To the host.

3 is a diagram illustrating an MIB compilation UI according to an exemplary embodiment of the present invention. FIG. 3 is a MIB compilation UI providing MIB management function. It can be useful when setting SNMP values by precompiling a MIB to be provided by a virtual device. In addition, you can load and unload MIB modules to use only specific MIBs without using all compiled MIBs.

4 is a diagram illustrating a UI in which a user can define an MIB value to be provided in a virtual device according to an exemplary embodiment of the present invention. The user can set the MIB value to be provided to be fixed, and the information to be changed such as traffic monitoring can be set to be automatically changed by setting the value change period, the change range, and the like. Automatic value changes are available in list and string formats as well as numeric formats.

5 is a diagram illustrating a UI for defining a structure of a Trap periodically generated in a virtual machine according to an embodiment. The user can predefine the Trap structure to determine what Trap will be generated in the virtual machine. Using Trap defined in MIB makes it easier to define Trap.

6 to 10 are views illustrating a UI for defining a device to be used as a virtual device according to an exemplary embodiment. Referring to FIG. 6, the user defines equipment by inputting manufacturer information and model information of the equipment to be provided by the virtual equipment agent. The device definition also selects the MIB to be provided by the current device. As shown in FIG. 7, the user can check and select the MIB value to be provided from the equipment in the tree. Also, a part or all of the values of the MIB can be fetched from the actual equipment, and the method is illustrated in FIG. As shown in FIG. 8, when a user creates a profile of an actual device to import an MIB value and selects and imports an MIB to be imported, the user obtains the value from the actual device and displays it. . By importing all the MIB values of the actual equipment, you can virtualize and test a large number of equipments like the actual equipment.

In the device definition, a Trap to be provided by the virtual device is also designated, as shown in FIG. As shown in FIG. 9, a user can create and set a Trap instance to be generated in a virtual device using a predefined Trap definition. Trap instances have a lot of binding values and can vary in value depending on the actual equipment situation, making it difficult to create them. Therefore, Trap generated from the equipment can be captured and used as shown in Fig. 10 for easy Trap instance creation. As shown in FIG. 10, the user can start the Trap server and capture the Trap generated from the real equipment. If the user wants to use the Trap, he can import it by dragging it into the Trap value selection window. In this way, it is possible to test the amount of traps that can be processed by the network management system and the normal processing by setting traps to occur in the virtual equipment.

11 to 13 are views showing a UI for managing a virtual equipment agent to operate the virtual equipment according to an embodiment. When the agent IP is set to the agent and the agent is started, the agent is registered in the manager. After that, the manager controls all the operations of the agent. Since the virtual device operates with packet capturing, the MAC address of the interface to capture packets in the virtual device of the agent must be set. Before activating the agent, you must first configure the device information to be executed by the agent. As shown in FIG. 12, the user sets the model of the equipment to be operated in the agent, the IP address range, the SNMP community, and the like. Also, if the network management system and the agent are on different subnets, enter the gateway address in the routing table to be used by the virtual device. Also, if you want to send Trap to the network management system, set the IP address of the network management system in the Trap host. When a virtual machine is started, virtual machines as many as the number of machines specified in the machine configuration are operated, and the status of each virtual machine can be checked and set through the machine status. FIG. 13 shows a list of virtual machines currently operating in the selected agent. You can start or stop the SNMP, Trap, and ICMP processes for a specific device or device.

14 is a diagram illustrating a virtual equipment agent UI according to an embodiment. The user can set the server information to be accessed through the virtual equipment agent UI and the amount of memory to be used by the agent, and operate the agent.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

100: Virtual Equipment Manager 110: SNMP MIB Compiler
120: Definition part 121: MIB value definition part
122: trap definition unit 123: virtual equipment definition unit
124: definition of virtual equipment agent 130: SNMP Import
140: TRAP Import 150: User Interface
160: Agent communication module 170: Definition file database
200: Virtual Equipment Agent 210: Packet Capture / Transmission Module
220: Agent processing unit 230: Virtual equipment process
240: ARP process 250: ICMP process
260: SNMP agent

Claims (9)

1. A virtual equipment network system for testing a network management system using a Simple Network Management Protocol (SNMP)
An SNMP MIB compiler that compiles a Management Information Base (MIB) provided by the equipment manufacturer, and
A virtual device manager defining a virtual device and defining a virtual device to configure a test network including a definition part for managing definition contents using a compiled MIB name and an object identifier (OID); And
And a virtual equipment agent for operating a plurality of virtual machines according to definition contents of the virtual machine manager,
The definition part
A MIB value defining unit for defining a value of SNMP data to be provided by the virtual device, defining a value input by the user as a default value, or defining a value collected from the actual equipment as a default value,
A trap definition part that defines an SNMP trap (Trap) to be generated in the virtual device, and
In order to generate SNMP data and SNMP traps, it is necessary to set SNMP data and SNMP traps to be provided by the virtual equipment, to register the equipment manufacturer and model as virtual equipment, A virtual machine network system comprising a virtual machine definition section defining virtual machines defined by the devices.
delete 2. The method of claim 1 wherein the definition portion comprises:
A virtual equipment agent defining unit for defining a virtual equipment agent so that the defined virtual equipment is operated by the virtual equipment agent;
The virtual machine network system comprising:
delete The method of claim 3,
The trap definition unit defines SNMP traps generated according to user input as SNMP traps to be generated in the virtual equipment or defines SNMP traps collected from the actual equipment as SNMP traps to be generated in the virtual equipment.
delete 6. A virtual equipment agent as claimed in any one of claims 3 to 5,
A packet capture / transmission module that captures or externally transmits packets;
And an agent processing unit for generating a virtual equipment process according to the definition of the virtual equipment agent,
The virtual equipment process is a virtual equipment network system that sends and receives packets to and from the network management system through the packet capture / transmission module.
8. The method of claim 7,
The virtual equipment agent accesses the virtual equipment manager, transmits a list of interface information of the station on which the virtual equipment agent is running to the virtual equipment manager,
The virtual appliance agent definition section sets the virtual device to be operated by the virtual appliance agent, the IP address range, the routing table, the trap host list in which to generate the SNMP trap, the SNMP community of the virtual appliance, and the interface MAC address of the station to be used by the packet capture / In addition,
The agent processing unit creates a virtual equipment process corresponding to the number of IPs in the IP address range according to the defined contents of the definition unit, and generates an IP address of the virtual equipment, a routing table to be used by the virtual equipment, an SNMP community of the virtual equipment, A virtual appliance network system that sets up MAC addresses, SNMP data, SNMP traps, and a list of trap hosts.
9. The method of claim 8,
The virtual equipment process is a virtual equipment network system that executes ARP (Address Resolution Protocol) process, ICMP (Internet Control Message Protocol) process and SNMP process sequentially.
KR1020150041686A 2015-03-25 2015-03-25 Virtual device network system KR101685892B1 (en)

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Citations (2)

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KR100464330B1 (en) * 2001-12-04 2005-01-03 삼성전자주식회사 Method and System For Display and Management the Representative severity of Network Element in SNMP Manager
KR100919058B1 (en) * 2007-12-06 2009-09-24 한국전자통신연구원 Network node simulation apparatus and method for network control platform

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KR20030066028A (en) * 2002-02-04 2003-08-09 윤영선 Module-development system of virtual network-management
KR101490316B1 (en) 2013-12-20 2015-02-11 주식회사 엘지유플러스 Fault Detection System For Network Device And Fault Detection Method Using The Same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100464330B1 (en) * 2001-12-04 2005-01-03 삼성전자주식회사 Method and System For Display and Management the Representative severity of Network Element in SNMP Manager
KR100919058B1 (en) * 2007-12-06 2009-09-24 한국전자통신연구원 Network node simulation apparatus and method for network control platform

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