KR100397924B1 - Method of Managing for IP Address and MAC Address in VOIP System - Google Patents

Abstract

The present invention relates to a method of managing an IP address and a MAC address in a VOIP system. In particular, when a plurality of line cards are mounted in a VOIP system, an upper processor card in the VOIP system allocates an IP address and a MAC address for each slot to pair. In the conventional method, when a plurality of line cards are mounted, an IP address is assigned for each slot, but the MAC address is embedded in the line card itself. Thus, a line card embedded in a specific slot may fail, causing another line card to fail. In this case, the MAC address of the ARP table was not immediately updated in the other party's VOIP system.

In the present invention, the upper processor card in the VOIP system allocates the MAC address for each slot together with the IP address to manage the pair, so that when a line card in communication fails and is replaced with another line card, the IP address already assigned to the slot By initializing the line card replaced with the MAC address, it is possible to prevent communication from being lost while the MAC address of the ARP table is updated in the VOIP system in communication.

Description

Method of Managing IP Address and MAC Address in VOIP System

The present invention relates to a method of managing an IP address and a MAC address in a VOIP system. In particular, the upper processor card in the VOIP system registers and manages an IP address and a MAC address in a slot address table for each slot in a slot address table. The present invention relates to a method of managing an IP address and a MAC address in a VOIP system that allows a service to continue even if a line card is replaced due to a failure.

Referring to Figure 1 attached to the general Voice Over Internet Protocol (VOIP) service structure as follows briefly described.

First, an IP phone is connected to the VOIP system 200 through the Internet for voice calls using the Internet, and the VOIP system 200 is connected to a public switched telephone network (PSTN), which is a general telephone network, for a call connection with a general telephone. In this case, in FIG. 1, the general telephone is connected through a PBX (Private Branch Exchange) 100, but in most cases, is connected to a local exchange on a PSTN.

The VOIP system 200 is a kind of Internet phone gateway that plays a voice call between a general telephone user and an IP phone user. The VOIP system 200 is connected to a trunk such as E1 or T1 connected to a PSTN side of a general telephone network. A PSTN interface card 201 that provides an interface to the Internet, a plurality of line cards 203-210 that provide an interface with the Internet side, and a PSTN interface card 201 and line cards 203-210 that control the general It consists of an upper processor card 202 that allows telephone users and IP phone users to make Internet-based voice communications through the VOIP system 200.

The IP address and MAC address management method of the VOIP system 200 in the VOIP service structure as described above is as follows.

When the line cards 203 to 210 are mounted in a plurality of slots of the VOIP system 200, the IP addresses are allocated to the slot cards from the upper processor card 202 for each slot as shown in FIG. 2. Initialized to ~ 210). That is, the upper processor card 202 registers and manages IP addresses in the slot address table for each slot, and transmits and assigns the registered IP address information to the line cards 203 to 210 mounted in the respective slots. Accordingly, the line cards 203 to 210 receive the IP address information transmitted from the upper processor card 202 and store it in the internal IP address information area. However, the MAC address is initialized to be embedded in the line cards 203 to 210 itself without being managed by the upper processor card 202 and has a structure of interworking with the IP network.

Therefore, when the line card 203 to 210 mounted in a specific slot fails during communication with another VOIP system (not shown) and is replaced with another line card 203 to 210, the IP address is assigned to the upper processor card 202. Since the line cards 203 to 210 replaced by the slots are managed in the corresponding slots, the IP addresses of the mounted line cards 203 to 210 are transferred from the upper processor card 202 to the IP addresses assigned to the slots. By being initialized, it becomes the same as the IP address of the line card 203-210 which failed. However, since the MAC address is initialized as assigned at the time of product shipment for each line card (203 to 210), the MAC address of the replaced line card (203 to 210) is different from the MAC address of the failed line card (203 to 210). Done.

Therefore, ARP (Address Resolution Protocol), which is an address resolution protocol of the other party's VOIP system (not shown) that is communicating with the VOIP system 200, recognizes the MAC address of the replaced line card as the MAC address of the failed line card. A collision of addresses occurs and communication is interrupted. Accordingly, the other party's VOIP system, which has been communicating, deletes the IP address and MAC address of the failed line card from the ARP table after a certain time has elapsed since the last packet is received, and at the same time, the IP address of the replaced line card (203 to 210) and Communication is resumed by registering the MAC address information and updating the ARP table.

For example, a first IP address (IP 1) assigned to line card 1 204 by upper processor card 202 via line card 1 204 mounted in slot 1 of FIG. 2. And when the first MAC address (MAC 1) information of the line card 1 204 itself is carried in a packet and transmitted to the system Y, the ARP of the system Y is the first IP address (IP 1) and the first MAC address (MAC 1). ) Register information in ARP table and communicate with each other.

At this time, when the line card 1 204 fails and is replaced with the line card 8 having the eighth MAC address MAC 8, the line card 8 is an IP address assigned to the slot 1 by the upper processor card 202. The first IP address IP 1 and the eighth MAC address MAC 8 which are the MAC addresses of the line cards 8 themselves are initialized.

Accordingly, the system X transmits the first IP address IP 1 and the eighth MAC address MAC 8 information in a packet to the system Y. The system X receives the first IP address in the ARP table of the system Y that receives the packet. Since the IP 1) and the first MAC address (MAC 1) information are registered, communication is impossible due to a mismatch of the MAC address corresponding to the first IP address (IP 1).

Therefore, system Y deletes the first IP address (IP 1) and the first MAC address (MAC 1) information from the ARP table if it does not receive the next packet even after a predetermined time after finally receiving the packet from the system X. After that, communication is resumed by registering the new information, the first IP address IP 1 and the eighth MAC address MAC 8, and updating the ARP table.

As described above, in the conventional VOIP system, when the MAC address is embedded in the line card itself, when the line card in communication fails and another line card is replaced, the MAC of the line card in which the other side VOIP system fails There is a problem that communication is lost for a predetermined time when the ARP table is updated due to a collision between the address and the MAC address of the replaced line card.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object thereof is to allow an upper processor card of a VOIP system to register and manage an IP address and a MAC address in pairs for each slot, thereby causing a failure in a communication line card and causing another line. When the card is replaced, the replaced line card is initialized with the IP address and the MAC address assigned to the corresponding slot to prevent the MAC address collision from occurring in the ARP table of the VOIP system in the communication side, thereby preventing communication loss.

1 is a configuration diagram of a VOIP service.

FIG. 2 shows the slot address table of the upper processor card in the conventional VOIP system of FIG. 1; FIG.

3 shows a slot address table of a higher processor card in a VOIP system in accordance with the present invention in FIG.

4 is a flowchart illustrating a method of managing an IP address and a MAC address in a VOIP system according to the present invention.

Explanation of symbols on the main parts of the drawings

100: PBX 200: VOIP system

201: PSTN interface card 202: upper processor card

203 ~ 210: Line card

A feature of the present invention for achieving the above object is the process of the upper processor card in the VOIP system to register and manage the IP address and MAC address for each slot in the slot address table; Transmitting and allocating IP addresses and MAC address information registered for each slot in the address table to line cards mounted in corresponding slots, respectively; A method of managing an IP address and a MAC address in a VIP system, comprising the step of allowing a VOIP system to communicate with an opponent VOIP system according to the IP address and MAC address information assigned to the line card. To provide.

Further, in the process of allocating the IP address and the MAC address information by transmitting to the line card, each line card stores the IP address and the MAC address information transmitted from the upper processor card in the internal information area.

In addition, when a line card mounted in a specific slot of the VOIP system fails and is replaced with another line card, the upper processor card receives an IP address and a MAC address corresponding to the slot in which the failed line card is mounted from the slot address table. Withdrawing process; And allocating the extracted IP address and MAC address to the replaced line card so as to continue communication with the other party's VOIP system.

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

Since the Voice Over Internet Protocol (VOIP) service structure to which the IP address and MAC address management method according to the present invention is applied is the same as the conventional VOIP service structure shown in FIG. 1, the same reference numerals will be used.

In the VOIP service structure, the functions of the private branch exchange (PBX) 100, the PSTN, the PSTN interface card 201, the Internet, and the like are the same as the above-described conventional functions, and thus the description thereof is omitted, but functions in the present invention. The functions of the added upper processor card 202 and the line cards 203 to 210 under the control of the upper processor card 202 will be described as follows.

The upper processor card 202 controls the PSTN interface card 201 and the line cards 203 to 210 in the VOIP system 200 so that a general phone user and an IP phone user can make a voice call with each other through the VOIP system 200. To help. In particular, the MAC (Media Access Control) address of each slot of the VOIP system 200 is registered and managed as a pair along with an IP (Internet Protocol) address, and the mounted line cards 203 to 210 are assigned to the corresponding slots. Initialize the IP address and MAC address.

The line cards 203 to 210 provide an interface with the Internet, and receive the allocated IP address and MAC address information from the upper processor card 202 and store them in the corresponding IP address and MAC address information area therein. do.

The IP address and MAC address management method in the VOIP system 200 according to the present invention will be described in detail with reference to FIG. 4 as follows.

The upper processor card 202 in the VOIP system 200 provided with slots for mounting a plurality of line cards 203 to 210 registers an IP address and a MAC address in a slot address table in pairs as shown in FIG. It manages (step S401). At this time, the line cards 203 to 210 mounted in the respective slots have different IP addresses and MAC addresses. In addition, the upper processor card 202 in the VOIP system 200 initializes the line cards 203 to 210 mounted in the respective slots with the IP address and the MAC address allocated to each slot to communicate with the other side VOIP system. Control voice calls between regular phone users and IP phone users.

Looking at the communication process with the other side VOIP system through the initialization of the line card (203 ~ 210) on which the upper processor card 202 is mounted, the upper processor card 202 is IP registered as a pair by slot in the slot address table The address and the MAC address information are transferred to each of the line cards 203 to 210 mounted in the corresponding slots for allocation (step S402). At this time, the transmitted IP address and MAC address information is unique in the entire VOIP service network.

Then, the line cards 203 to 210 that have received the IP address and MAC address information allocated by the upper processor card 202 store them in the IP address and MAC address information area therein (step S403). Accordingly, the VOIP system 200 transmits an IP address and MAC address information to a packet through the line cards 203 to 210 to the counterpart VOIP system, and the counterpart VOIP system receiving the packet receives the next packet. The IP address and the MAC address information are stored in the ARP table to continue communication (step S404).

On the other hand, when the line card (203 ~ 210) failure occurs during operation of the VOIP system 200 to replace another line card looks at the IP address and MAC address management method.

When the upper processor card 202 fails in the line card 203 to 210 mounted in a specific slot and is replaced with another line card 203 to 210 (steps S405 and S406), the failed line card 203 to 210 is failed. IP address and MAC address corresponding to the slot in which is mounted) are extracted from the slot address table and transmitted to the replaced line card (steps S407 and S408). Accordingly, the replaced line card receives IP address and MAC address information from the upper processor card 202, stores it in the internal information area, and continues to communicate with the other party's VOIP system according to the stored information (step S409).

Therefore, even if a certain line card fails during operation of the VOIP system 200 and is replaced by another line card, the IP address and MAC address of the ARP table of the partner VOIP system, which are in communication, do not change, so communication is immediately performed through the replaced line card. This can prevent communication from being lost due to MAC address conflicts while the ARP table is updated during line card replacement.

For example, the VOIP system 200 X is assigned a first IP address IP 1 and a first MAC address MAC assigned by the upper processor card 202 via the line card 1 204 mounted in slot 1 of FIG. 3. 1) When information is sent in a packet to system Y, the system ARP registers the first IP address (IP 1) and the first MAC address (MAC 1) information received from system X in the ARP table and communicates with each other. Will be performed. At this time, when the line card 1 204 mounted in the slot 1 of the system X fails and is replaced with the line card 8 having the eighth MAC address MAC 8, the IP address and the MAC address of the line card 8 are higher. The processor card 202 is initialized to the first IP address IP 1 and the first MAC address MAC 1 assigned to the slot 1 so that the IP address and the MAC address before and after the line card replacement are the same.

Therefore, the system X transmits the first IP address IP 1 and the first MAC address MAC 1 information in a packet to the system Y, and the system Y carries the IP address and the MAC address in the packet received from the system X. Since the information coincides with the information of the first IP address IP 1 and the first MAC address MAC 1 registered in the ARP table of the system Y, there is a problem that communication is interrupted for a certain time due to a MAC address conflict corresponding to the IP address. I never do that.

In addition, the embodiments according to the present invention are not limited to the above-described embodiments, and various alternatives, modifications, and changes can be made within the scope apparent to those skilled in the art.

As described above, according to the present invention, the upper processor card of the VOIP system registers and manages an IP address and a MAC address in a slot address table in pairs for each slot, so that a line card in communication fails and is replaced with another line card. In the VOIP system on the other end, the IP address and MAC address registered in the ARP table do not change, and the line card is replaced with the IP address and MAC address assigned to the slot. In the VOIP system of a time counterpart, communication is prevented from being lost while the ARP table is updated due to a MAC address conflict corresponding to the IP address of the ARP table.

Claims (3)

A step in which the upper processor card in the VOIP system registers and manages the IP address and the MAC address in the slot address table for each slot; Transmitting and allocating IP addresses and MAC address information registered for each slot in the address table to line cards mounted in corresponding slots, respectively; And the VOIP system communicating with the other party's VOIP system according to the IP address and MAC address information assigned to the line card. The method of claim 1, In the process of allocating the IP address and MAC address information to the line card, each line card stores the IP address and MAC address information transmitted from the upper processor card in an internal information area. How to manage IP address and Mac address. The method of claim 1, If a line card mounted in a specific slot of the VOIP system fails and is replaced with another line card, the upper processor card extracts an IP address and a MAC address corresponding to the slot in which the failed line card is mounted from the slot address table. Process; And assigning the extracted IP address and MAC address to the replaced line card so as to continue communication with the other party's VOIP system. .