KR20020076108A - Multiple gateway router - Google Patents

Abstract

PURPOSE: A multiple gateway router is provided to transmit and receive packets through a system using many WANs(Wide Area Networks) and to maintain the connection with an upper network through an automatic transfer or selection of gateways in case that a network fault is generated. CONSTITUTION: In a multiple gateway router, a CPU(1) controls a transmit-receive part(4) through a transmit-receive control part(2). Also the CPU(1) controls a power supply part(6) through a watchdog control part(3). The transmit-receive part(4) contains transceivers(41-43) which connect with more than two different WANs. Basically the first transceiver(41) is connected with a hub or a leased line router. The second transceiver(42) is connected with an ADSL modem or a cable modem. The third transceiver(43) is connected with a generic telephone switching network.

Description

Multiple gateway router

The present invention relates to a multiple gateway router, and more particularly, it is possible to stably use an online service by simultaneously using different transmission methods such as leased lines and broadband for the construction of a wide area network (WAN) of a computer network. It would be.

In general, a router is a device that reads the address of a destination included in transmission information (packet) and transmits it to another communication network using the most appropriate communication path when connecting and receiving information by connecting a local area network (LAN). It refers to a device that transmits and receives information using a promised protocol for configuring a remote network between an upper network and a lower network.

In this case, the router is generally connected to the upper network through one wide area network (WAN), and has an Ethernet port for connecting to the lower network.

The Wen uses a communication standard such as an Integrated Service Digital Network (ISDN) or a frame relay (Frame relay) to guarantee the movement of packets between two points, which is also called a dedicated line.

In addition, a method of providing high-speed communication through a public switched telephone network (PSTN) or a cable network is called a broadband, and a DSL (Digital Subscriber Line) or a cable Internet service. In case of using modem, it is possible to connect network that supports relatively low speed.

In addition, in the case of a dedicated line, a plurality of devices may be connected to the Internet by using a plurality of public IP addresses (Public Internet Protocol address).

Therefore, the dedicated line packet coming through the router uses only devices that have been assigned a public IP address, and devices that have not been assigned a public IP address transmit and receive packets using a network address translation (NAT) function. The amount of transmitted and received packets is called traffic.

However, since a conventional router supports only one connection, when a problem occurs in a transmission path, a problem arises that routing is not performed and information transmission between upper and lower networks is stopped.

In addition, there is a method of securing a backup transmission path through the PST network or broadband network by configuring a separate equipment, but if a problem occurs in the equipment responsible for the backup transmission path, the packet can not go out.

Accordingly, an object of the present invention is to solve the problems of the conventional router, so that packets can be transmitted and received through a device using a plurality of pigtails, which are used in different transmission methods such as broadband or ISD or PST. If a failure occurs in any one of the transmission paths, the connection with the upper network can be continued through automatic switching or automatic selection of the gateway. It is equipped with load sharing function that distributes into groups, and all the devices in the lower network use the official IP address assigned through the dedicated line as it is to set the IP address or port number. Smart that can select or limit gateway to The smart watchdog function is provided to provide multiple gateway routers to restart the device on its own when there is no response.

1 is a block diagram of a multiple gateway router according to the present invention.

2 is a flow chart of a multiple gateway router according to the present invention.

Figure 3 is a flow chart for the interface configuration of the multiple gateway router according to the present invention.

4 is a flowchart illustrating transmission network selection of multiple gateway routers according to the present invention.

5 is a flowchart illustrating an interface automatic switching of multiple gateway routers according to the present invention.

6 is a flow chart for traffic distribution of multiple gateway routers in accordance with the present invention.

7 is a flowchart illustrating the operation of the smart watchdog of the multiple gateway router according to the present invention.

Explanation of symbols on the main parts of the drawings

1: central processing unit 2: transmission and reception control unit

3: watchdog controller 4: transmitter / receiver

5: storage unit 6: power unit

41: transceiver 142: transceiver 2

43: transceiver 3

Multiple gateway router according to the present invention for achieving the above object, the step of setting the interface by embedding a plurality of pigs with different transmission schemes in one device (step 100); and continuously check the connection state of the pig Determining whether a transmission network is used (step 200); and automatically switching an interface to an available network (step 300); and dividing the devices on the network into separate groups to distribute traffic for each transmission network ( Step 400); And continuously checking the device to automatically restart when there is no response (step 500).

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

1 is a block diagram of a multiple gateway router according to the present invention, in which the central processing unit 1 controls the transceiver 4 through the transceiver 2 and the power supply unit 3 through the watchdog controller 3. 6) to control.

The transceiver 4 has a built-in transceiver for connecting to two or more different pigeons, basically, transceiver 1 (41) is connected to a hub or dedicated line router, and transceiver 2 (42) is an SDL modem. It is connected to the cable modem, the transceiver 3 (43) is connected to the general telephone switch network and the like.

In addition, the transceiver in the transceiver 4 can be expanded as necessary.

2 is a flowchart illustrating a multiple gateway router according to an embodiment of the present invention, in which a plurality of pigs having different transmission schemes are embedded in one device to establish an interface (step 100); and the connection state of the pigs is continuously checked. Determining whether a transmission network is used (step 200); and automatically switching an interface to an available network (step 300); and dividing the devices on the network into separate groups to distribute traffic for each transmission network ( Step 400); And continuously checking the device to automatically restart it upon no response (step 500).

3 is a flow chart of the interface configuration of the multiple gateway router according to the present invention. The interface number is set 101 and the type of connection to be set is determined 102 and 104.

At this time, in the case of DSL, after inputting ID and password (103), the environment setting (107) such as a fixed IP address is performed, and in the case of cable, the environment setting (107) such as a fixed IP address is directly performed. After setting the IP address and routing-related settings (106), the environment setting such as a fixed IP address (107), and in the case of a dial-up modem, enter a phone number, ID and password (106), and then set the environment such as a fixed IP address. (107).

When the interface setting for one pigtail is completed through the above process, after confirming whether to set up the interface for the other pigtail (108), the process is repeated by increasing the interface number (109) if not added, and not added. If that's done, set up the interface.

4 is a flowchart illustrating a transmission network selection of a multiple gateway router according to the present invention. After the interface setting is completed, the transmission network is continuously attempted to be connected to each transmission network through a transmission / reception control unit 2 at a predetermined time interval. To record and control, a specific packet is sent 201 and awaited a response 202.

If there is a response, the state of the transmission network is recorded as normal, and the average response time is recorded (206) to maintain an optimal network connection state.

However, if there is no response, the packet is retransmitted. If there is no response after the retransmission, the interface is deleted (205) and is not used until it is restored to a normal state.

FIG. 5 is a flowchart illustrating the automatic switching of interfaces of multiple gateway routers according to the present invention. The network connection state is checked to search for an available network (301), and the gateway is randomly set in an environment setting (107) such as a fixed IP address. In step 302, it is determined whether or not it is designated as 302, and whether or not it is used is checked.

At this time, if available, change the default gateway to an arbitrarily set interface (305), record the interface status as normal (306), and specify that all traffic can be transmitted to the upper network through the default gateway. .

If it is not in the random configuration mode, it is determined whether the first interface is available (304), if available, changes to the default gateway (305) and records the state of the interface to normal (306), and the available interface is If not found, the interface status is recorded as an error 307, and the network connection check is executed again and searched 308 repeatedly until an available interface is found.

FIG. 6 is a flowchart illustrating a traffic distribution of a multiple gateway router according to the present invention, and prepares a packet to be transmitted when operating in a manner of distributing traffic by using a plurality of web interfaces simultaneously.

In the configuration 107 such as the fixed IP address, it is determined whether the traffic distribution is selected (402). If the distribution is not configured, the packet is transmitted to the default gateway (403).

However, if traffic distribution is set, it is determined whether priority is set for the individual interface (404), and if there is priority, the packet is transmitted (407) over the interface having the highest priority by priority.

If the priority is not set, the available interfaces are sequentially selected using a round robin method, or an interface is appropriately selected according to each usage using a load sharing method (405) and a packet is transmitted (406). .

7 is a flowchart illustrating the operation of the smart watchdog of the multiple gateway router according to the present invention, wherein the watchdog control unit 3 displays the state of the transmission / reception unit 4 from the central processing unit 1 through the transmission / reception control unit 2. In order to receive the indicated signal, it is switched to the primary standby mode, and waits 501 for receiving the signal for a predetermined time.

Here, when there is a signal input, the signal standby 501 is again performed in the primary standby mode, and when there is no signal input, the signal standby 503 is performed in the secondary standby mode.

At this time, if there is a signal input, the signal standby 501 in the primary standby mode again. If there is no signal input, it is determined that a system problem occurs in hardware or software, and a reset signal is transmitted to the power supply unit (505). Restart your system.

The present invention may be modified in various ways without departing from the basic concept according to the needs of those skilled in the art.

As described above, according to the present invention, a connection with a plurality of pigeons using different transmission schemes, such as a dedicated line or a broadband, may be simultaneously used through a modem and an existing router, and a problem such as a network failure may occur. In this case, the automatic switchover or automatic selection of gateways keeps the connection to the upper network continuously, and the load sharing can be appropriately distributed or distributed to individual groups by integrating the connection of the network without failure into one. However, all devices in the sub-network can select or limit the gateway through which the packet passes by simply setting the IP address or port number using the public IP address assigned through the leased line. Automatically restart if delay of connection It has the effect of minimizing.

Claims (6)

In a router that can be controlled by connecting several pigtails using different transmission methods, Setting up an interface by embedding a plurality of pigs having different transmission methods in one device (step 100); and Continuously checking the connection state of the pigtail to determine whether the transmission network is used (step 200); and Automatically switching interfaces to available pigtails (step 300); and Dividing the devices on the network into individual groups to distribute traffic for each transmission network (step 400); And And continuously checking the device to automatically restart upon no response (step 500). The method of claim 1, The step of setting the interface by embedding a plurality of pigs with different transmission schemes in one device (step 100), After setting the interface number (101) and determining the type of connection to be established (102, 104), the environment setting (107), such as a fixed IP address, is performed. When it is finished, after confirming whether to set the interface for the other pigs (108), if you add the interface number is increased (109) and repeat the above process, if not added multiple, characterized in that to complete the pigeon interface settings Gateway router. The method of claim 1, Continuously checking the connection state of the pigtails to determine the use of the transmission network (step 200), After sending a specific packet (201) and waiting (202) for a response, if there is a response, the state of the transmission network is recorded as normal, and the average response time is recorded (206). If there is no response, the packet is retransmitted and retransmitted. If there is no response after the deletion, the interface is deleted (205) and not used until it is restored to its normal state. The method of claim 1, The step of automatically switching the interface to the available pigtails (step 300), Determining whether the gateway is set to the random setting mode by searching the available network (301) (302), checking whether it is used (303), and changing the default gateway to the randomly set interface (305) if available, It records the state of the interface as normal (306), specifies that all traffic can be sent to the upper network through the default gateway, and if it is not in any configuration mode, determines (304) whether the first interface is available and uses it. If possible, change to the default gateway (305), record the status of the interface as normal (306), if no available interface is found, record the interface status as an error (307), and the network connection check is run again and available. Multiple gateway routers, characterized by recursive search (308) until the interface is found. The method of claim 1, The step of dividing the traffic for each transmission network by dividing the devices on the network into individual groups (step 400), After preparing (401) a packet to be transmitted, a determination (402) is made as to whether traffic distribution is selected in the environment setting (107) such as the fixed IP address, and if the distribution is not set, the packet is transmitted to the default gateway ( 403), if traffic distribution is set, it is determined whether priority is set for the individual interface (404), and if there is a priority, the packet is transmitted (407) through the interface having the highest priority by priority; If not, the available interfaces are sequentially selected using a round robin method, or an interface is appropriately selected (405) and a packet is transmitted (406) according to each usage using a load sharing method. Multiple Gateway Routers. The method of claim 1, Continuously checking the device to automatically restart upon no response (step 500), In order to receive a signal indicating the transmission and reception state is switched to the primary standby mode, waits for receiving a signal for a predetermined time (501), if there is a signal input signal standby 501 in the primary standby mode again, If there is no signal input, the signal standby 503 is performed in the secondary standby mode. If there is a signal input, the signal standby 501 is returned to the primary standby mode, and if there is no signal input, the reset signal is sent to the power supply unit. Multiple gateway router, characterized in that for transmitting (505).