KR20000047072A - Asymmetric digital subscriber line router and network management method thereby - Google Patents

Abstract

PURPOSE: An ADSL(Asymmetric Digital Subscriber Line) router and the network management method thereby are provided to achieve remote network management through the ADSL and local network management, capable of out-of-band management through the serial interface and in-band management through the SNMP(Simple Network Management Protocol), through the ethernet. CONSTITUTION: An ADSL interface unit(19) is connected with a remote network management system(10) through an ATM and the ADSL. An ethernet interface unit(41) is connected with a local network management system(40). An ATM protocol processing unit(21) processes messages received through the ADSL interface unit(19) by an ATM protocol. An ILMI(Internal Local Management Interface) message processing unit(22) carries out UME receiving and processing for ILMI messages by the ATM protocol processing, based on a second management information base(25). A PPP(Point-to-Point Protocol) processing unit(26) carries out PPP processing for PPP messages by the ATM protocol processing. A UDP/IP(User Datagram Protocol/Internet Protocol) processing unit(27) carries out UDP/IP processing for the messages received through the ethernet interface unit(41). A message conversion unit(23) connected between the ILMI message processing unit(22) and an SNMP agent(24) converts SNMP messages and ILMI messages mutually.

Description

Asymmetric Digital Subscriber Line Router and Its Network Management Method

The present invention relates to an asymmetric digital subscriber line (ADSL) router and its network management method in a broadband access network (B-ISDN) subscriber access network, and in particular, remote network management through ADSL, Ethernet Local network management is possible through Ethernet, and out-of-band management through serial interface and in-band management through Simple Network Management Protocol (SNMP) are available for ADSL routers and their network management methods. It is about.

Asymmetric Digital Subscriber Line (ADSL), Very High Speed Digital Subscriber Line (VDSL), Hybrid Fiber / Coax (HFC), Fiber to the Curb (FTTC) And FTTH (Fiber to the Home), and the asymmetric digital subscriber line (ADSL) is a technology that enables one-way high-speed data transmission as one of modem technologies, and can be applied to video transmission using a conventional telephone line. A video service using ADSL is possible as an application service of a high-speed communication network in the form of a broadband communication network (B-ISDN).

In general, as ADSL technology advances, one-way data transmission of 1.5 Mbit / s (T1) or 6 Mbit / s (T2) bandwidth can be performed at a geographically limited distance using existing telephone lines. Using telephone lines, traditional television-quality video transmission is now possible. ADSL can transmit data of limited bandwidth to subscribers upstream to video information provider.Provide on-demand video service using ADSL can also control video signal, and in Korea, it is used for video service using ADSL technology. As an advantage, a test service in the ADSL method is in progress.

Conventional network management techniques include the Simple Network Management Protocol (SNMP), the Common Management Information Protocol (CMIP), and the Internal Local Management Interface (ILMI) associated with Asynchronous Transfer Mode (ATM). Interface) and the network management protocols are implemented by combining parts necessary for managing network devices.

However, although there are many conventional network management techniques, there is no network management technique for the ADSL router, and the ILMI User Network Interface (UME: UNI) Management Entity (UME), which is a management object of ATM, There is a problem in that there is no technology for connecting SNMP agents, which are management objects of Ethernet, to each other.

The present invention has been proposed to solve the above problems, an object of the present invention is to enable remote network management via ADSL, local network management via Ethernet (Ethernet) and local network management is out of band through the serial interface The present invention provides an ADSL router capable of in-band management through management and a simple network management protocol (SNMP) and a network management method thereof.

1 is a block diagram of an asymmetric digital subscriber line router according to the present invention;

2 is a flowchart illustrating a method for managing an asymmetric digital subscriber line router network according to an embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

10: remote network management system

20: Asymmetric Digital Subscriber Line Router

30: console 40: local network management system

19: ADSL interface unit 21: ATM protocol processing unit

22: ILMI message processing unit (UME) 23: message conversion unit

24: SNMP agent 25: Second management information base

26: PPP protocol processing unit 27: UDP / IP processing unit

28: first management information base 29: command interpreter

In order to achieve the above object, the router of the present invention is an ADSL interface unit connected to the remote network management system through ATM and ADSL, a serial interface unit connected to the console, and an Ethernet interface connected to the local network management system through the Ethernet network. An ATM protocol processing unit for processing a received message through the ADSL interface unit as an ATM protocol, a command interpreter for receiving and processing a received message via the serial interface with reference to a first management information base, and a second management information base; An ILMI message processing unit for receiving and processing UME if the ILMI message is processed by the ATM protocol processing, a PPP protocol processing unit for processing a PPP protocol if the PPP message is processed by the ATM protocol processing, the PPP protocol processed message and the Ethernet Receive message via interface Receives the UDP / IP processing unit processing the UDP / IP protocol, and the UDP / IP processed SNMP message, processes the agent's own message by referring to the first management information base, and outputs the message if the agent's own message is not. And an SNMP agent, and a message converter connected between the ILMI message processor and the SNMP agent to convert the SNMP message and the ILMI message to each other.

The network management method of the ADSL router of the present invention includes the steps of checking a received message through an ADSL interface, a serial interface or an Ethernet interface, processing the received message through the ADSL interface with an ATM protocol, and processing the ATM protocol. Receiving and processing a UME if the message is an ILMI message; processing a UDP / IP protocol if the PPP message is processed by the ATM protocol; receiving and processing an SNMP message; receiving a command interrupt for a received message through the serial interface; And processing, receiving a UDP / IP protocol message through the Ethernet interface, receiving an SNMP message, and processing an SNMP message if the agent owns the message by receiving the SNMP message; If it is not agent's own message by agent receiving And converting the message to receive and process the UME.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a configuration of an ADSL router according to the present invention. In FIG. 1, the router 20 includes an ADSL interface unit 19, an ATM protocol processor 21, an ILMI message processor 22, a message converter 23, an SNMP agent 24, and a second management information base 25. , Point-to-Point Protocol (PPP) protocol processing section 26, UDP / IP (User Datagram Protocol / Internet Protocol) processing section 27, first management information base 28, command interpreter 29, serial interface section 31, an Ethernet interface unit 41 is included.

The ADSL interface unit 19 is connected to the remote network management system 10 via ATM, the serial interface unit 31 is connected to the console 30, and the Ethernet interface unit 41 is connected to the local network management system via Ethernet. Connected with

A network management entity (NME) according to the present invention is composed of three management objects.

The first is ILMI UME processing, which receives the role of receiving the ILMI message from the ATM network and sending the corresponding message and maintains its own management information.

The second is SNMP agent processing, which responds to messages from both directions. One responds to the SNMP message transmitted from the remote network management system 10 and the other to the SNMP message transmitted from the local network management system 40. Of course, both assume that they have the proper protocol stack structure.

The third part is command interrupt processing, which interprets and executes commands of the console 30 coming into the serial interface unit 31. In addition, there are various protocol processing units for the three management objects.

2 is a flowchart illustrating the operation of a network management object in an ADSL router according to an embodiment of the present invention.

The operation of the present invention will be described by dividing into four. Basically, it is ILMI processor 22, SNMP agent 24, and command interpreter 29 that can respond to a certain command or message.

(1) When an SNMP message is received from the remote network management system 10,

Receiving an SNMP message from the remote network management system 10 is a kind of ATM connection setup. The SNMP message is processed by the ATM protocol processor 21, converted into a ATM adaptation layer 5 (AAL5), and then passed to the PPP protocol processor 26. The PPP protocol processing section 26 processes and passes the message to the UDP / IP protocol again, and finally, the SNMP agent 24 analyzes and responds to the SNMP message delivered from the UDP / IP processing section 27. The response process is the reverse of the reception process. However, the remote network management system 10 also has the same protocol stack.

(2) When receiving an SNMP message from the local network management system 40,

The message received from the local network management system 40 has two paths. When the SNMP agent 24 searches or sets the first management information base 28 through the UDP / IP processing unit 27 and converts the received SNMP message to access the second management information base 25. The unit 23 converts the data into a form recognizable by the UME, and the UME in the ILMI message processing unit 22 accesses the second management information base 25 on behalf of the SNMP agent 24 based on the message. This is the case.

(3) when an ILMI message is received from an ATM network exchange,

Upon receiving the ILMI message from the ATM protocol processor 21, the content of the UME message is analyzed and responded.

(4) When a command is received from the console,

The command interpreter 29 receives and analyzes the command and reflects it on the system directly through the unique management information in the first management information base 28.

An operation flowchart of the network management method of the ADSL router will be described in more detail with reference to FIG. 2.

First, it is checked whether there is a message received from the ADSL router 20 (S1). It is checked whether the message received at the ADSL router 20 is received at the ADSL interface unit 19 (S2). If there is a message received at the ADSL interface unit 19, the ATM protocol processor 21 receives the received message. If it is not received at the ADSL interface 19, it is checked whether it is received at the serial interface 31 (S9).

If there is a message received through the ADSL interface unit 19 in the ATM protocol processing unit 21, it is identified whether the received message is an ILMI message or a PPP message, and if the ILMI message is transmitted to the ILMI message processing unit 22, If the PPP message is transmitted to the PPP protocol processing unit 26 (S4).

If the message received by the ATM protocol processor 21 is an ILMI message, the ILMI message processor 22 receives the ILMI message and updates network management information of the second management information base 25 to receive and process the UME. (S5).

If the message received by the ATM protocol processor 21 is a PPP message, the PPP protocol processor 26 processes the PPP message, generates a UDP / IP message, and provides the UDP / IP message to the UDP / IP processor 27 (S6). The / IP processing unit 27 receives the UDP / IP message, processes the UDP / IP protocol, generates an SNMP message, and provides the generated SNMP message to the SNMP agent 24 (S7).

The SNMP agent 24 receives an SNMP message, updates network management information to the first management information base 28 (S8), and sends a response message after receiving and processing the SNMP agent 24 to the UDP / IP processing unit. (27), the PPP protocol processor 26 and the ATM protocol processor 21 are transmitted to the remote network management system 10 through the ADSL interface 19 (S18).

If the received message of the ADSL router is received at the serial interface 31 and is received at the serial port, the command interpreter 29 receives the command of the console 30 to receive the network of the first management information base 28. The management information is updated (S10), and the response message is transmitted to the console 30 through the serial interface unit 31 (S18).

When there is a received message of the ADSL router, if there is no message received in the ADSL interface 19 and the serial interface unit 31, the Ethernet interface unit 41 checks the reception (S11).

When the Ethernet interface unit 41 receives a message from the local network management system 40, the UDP / IP protocol is processed through the UDP / IP processing unit 27 to generate an SNMP message to provide the SNMP agent 24. (S12).

The SNMP agent 24 receives the SNMP message (S13), checks whether the SNMP agent 24 is its own message (S14), and processes the SNMP message if it is its own message, thereby processing the first management information base 28. Update the network management information of the network manager (S15), and if not the own message of the SNMP agent 24 transmits an SNMP message to the message conversion unit 23, the message conversion unit 23 to the SNMP message as an ILMI message The conversion is transmitted to the ILMI message processing unit 22 (S16).

In this case, the message conversion unit 23 converts the ILMI message into an SNMP message, and the second management information base 25 has unique information related to the configuration environment of the ADSL router as well as standard management information.

The ILMI message processing unit 22 updates the network management information of the management information base 2 25 to receive and process the UME (S17).

After the reception and processing of the SNMP agent 24 (S15) and the UME reception and processing (S17), the response message for the reception is transmitted in the reverse process of the reception (S18), and the message received by the ADSL router 20 subsequently. Repeat the process to check if there is any.

As described above, by realizing a network management object for the management of the ADSL router according to the present invention, it is possible to remotely manage via ADSL and to manage the region via Ethernet. It has the effect of enabling in-band management through of-band management, telnet port, and SNMP port.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit of the invention described in the claims below. You will understand.

Claims (2)

An ADSL interface unit connected to a remote network management system through ATM and ADSL; A serial interface unit connected to the console; An Ethernet interface unit connected to the local network management system through the Ethernet network; An ATM protocol processor configured to process a received message through the ADSL interface unit as an ATM protocol; A command interpreter for receiving and processing a received message through the serial interface with reference to a first management information base; An ILMI message processing unit for receiving and processing a UME if it is an ILMI message by the ATM protocol processing with reference to a second management information base; A PPP protocol processing unit for processing a PPP protocol if the PPP message is processed by the ATM protocol processing; A UDP / IP processor for UDP / IP protocol processing of the PPP protocol processed message and the received message through the Ethernet interface unit; An SNMP agent that receives the UDP / IP-processed SNMP message and processes the agent's own message with reference to the first management information base, and outputs the message for agent conversion if it is not the agent's own message; And And a message converting unit connected between the ILMI message processing unit and the SNMP agent to convert the SNMP message and the ILMI message to each other. Checking a received message over an ADSL interface, a serial interface or an Ethernet interface; Processing the received message over the ADSL interface with an ATM protocol; Receiving and processing a UME if the message is an ILMI message by the ATM protocol processing; Processing a UDP / IP protocol if the PPP message is processed by the ATM protocol processing, and receiving and processing an SNMP agent; Receiving and processing a command interrupt over a serial interface; UDP / IP protocol processing of the received message through the Ethernet interface and receiving an SNMP message; Processing an SNMP message if the agent owns the message by receiving the SNMP message; And converting the message from the agent's own message by the SNMP agent reception to receive and process the UME.