KR102161778B1 - L2 switching hub with routing - Google Patents

Abstract

The present invention is to provide an L2 switching hub which is cheaper than an L3 switching hub and can improve the disadvantages of the L2 switching hub so that communication can be performed without lowering the data rate at a minimum cost. According to an embodiment of the present invention, an L2 switching hub may comprise: an external network LAN port, as a plurality of LAN ports to which an external LAN line is connected, to which a unique IP address is assigned to each external network LAN port; a terminal device LAN port, as a LAN port to which a terminal device is connected, which is grouped and assigned as a plurality of LAN ports for each external network; an address table in which MAC addresses of each terminal device connected to the terminal device LAN port are stored for each unique IP address assigned to the external network LAN port; and a routing processor for searching for information on a LAN port of a device having the MAC address in a received data packet when the data packet with a unique IP address assigned to each external network LAN port is received, and routing to the searched device LAN port.

Description

L2 switching hub with routing function

The present invention relates to an L2 switching hub, which has a routing function.

In general, CCTV (Closed Circuit Television) receives video information from a recording device such as a video camera installed in a specific space (hereinafter referred to as “CCTV camera”) through a closed wired/wireless transmission path, plays and stores in real time, and stores the video. It refers to a system that allows information to be used for specific purposes such as security and crime prevention.

At the beginning of commercialization, CCTVs were mainly used to prevent theft of banks, and as crime and terror threats increased, the scope of use of CCTVs was expanded to homes, schools, companies, and government agencies to protect people's privacy and safety. In addition, the demand is increasing in special fields such as medical, military, and aviation.

In particular, in real life, CCTV is installed at the entrance of apartments, vulnerable points in residential areas, elevators, and shopping centers for the purpose of ensuring the safety of people, and photographing and monitoring the situation by time is performed, and in case of an actual incident, it is used to resolve the incident. Provides the key clues you need.

Accordingly, dozens or hundreds of CCTV cameras are installed in a single building, and such a plurality of CCTV cameras are each connected to a switching hub as shown in FIG. 1 and connected to an external network through a router.

Switching hubs are classified into L2 and L3 switching hubs according to which address they switch with.

The L3 switching hub has a basic routing function, so it can be used for communication purposes (minimum traffic generation and speed reduction) without (mutual interference) between networks, but it is more expensive than L2 and has trouble setting. In addition, since it takes a lot of setting time, there is a cost burden of paying an installation technology fee of up to 400,000 won to 1.2 million won per trip to the setting technician of the L3 switching hub.

In the case of an L2 switching hub, since it does not have a routing function, the price is lower than that of the L3 switching hub, and it has the advantage of convenient setting. However, there is a problem that traffic and speed drop occurs because all IPs such as 24port and 16port are transmitted during IP transmission.

Korean Patent Registration No. 10-0646011

The technical problem of the present invention is to provide an L2 switching hub that is cheaper than an L3 switching hub, and which improves the disadvantages of the L2 switching hub so that communication can be performed without lowering the data rate at a minimum cost.

An embodiment of the present invention is a plurality of LAN ports to which an external LAN line is connected, comprising: an external network LAN port to which a unique IP address is assigned to each external network LAN port; A LAN port to which a terminal device is connected, comprising: a terminal device LAN port that is grouped and assigned as a plurality of LAN ports for each external network; An address table in which MAC addresses of each terminal device connected to the terminal device LAN port are stored for each unique IP address assigned to the external network LAN port; When a data packet having a unique IP address assigned to each external network LAN port is received, routing to search the device LAN port information having the MAC address in the received data packet from the address table and route it to the searched device LAN port It may include a processor;

When N external network LAN ports are implemented and M number of terminal device LAN ports are grouped and allocated for each external network LAN port, the total number of terminal device LAN ports may be implemented as N×M.

The switching hub includes a grouping selection button for selecting a terminal device LAN port to be grouped for each external network LAN port, and a terminal device LAN port to be included in each external network LAN port is determined by pressing the selection button. It can be characterized.

The switching hub includes a routing selection button for selecting static routing or dynamic routing, and the routing processor includes a unique MAC address recorded in a data packet having a unique IP address assigned to any one external network LAN port. If the IP address is not searched in the address table, data packet discarding or MAC address re-search may be performed according to a routing method selected by the routing selection button.

The routing processor discards MAC addresses that are not searched when static routing is selected by the routing selection button, and when dynamic routing is selected by the routing selection button, the external network LAN port where the data packet is received. It can be characterized by searching for the MAC address in the address table of the unique IP address allocated to a LAN port of an external network other than that of.

The terminal device is implemented as a CCTV camera, and the routing processor may transmit an image data packet photographed by the CCTV camera to an external network through a LAN port of the terminal device.

The switching hub includes a temporary buffer provided between the external network LAN port and the terminal device LAN port, and the routing processor is recorded in a data packet having a unique IP address allocated to any one external network LAN port. If the MAC address is not searched in the address table of the unique IP address, the video data packet of the terminal device having the MAC address not searched may be stored in the temporary buffer.

According to an embodiment of the present invention, by grouping ports by IP address in the L2 switching hub, only the grouped ports are routed, thereby lowering the manufacturing cost and reducing the burden of routing setting.

In addition, according to an embodiment of the present invention, a separate grouping selection button and a routing selection button are provided, so that efficient routing can be performed in the L2 switching hub.

1 is a configuration diagram of a conventional switching hub.
2 is a block diagram of an L2 switching hub having a routing function according to an embodiment of the present invention.
3 is an exemplary illustration of a CCTV camera connected to an L2 switching hub having a routing function according to an embodiment of the present invention.
4 is an exemplary diagram of a terminal device LAN port grouped and allocated as a plurality of LAN ports for each external network according to an embodiment of the present invention.
5 is an exemplary diagram of an address table according to an embodiment of the present invention.
6 is an exemplary diagram of a switching hub equipped with a grouping selection button according to an embodiment of the present invention.

Hereinafter, the advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and is provided to completely inform the scope of the invention to those of ordinary skill in the art to which the present invention belongs. As such, the invention is only defined by the scope of the claims. In addition, when it is determined that related well-known technologies or the like may obscure the subject matter of the present invention in describing the present invention, detailed descriptions thereof will be omitted.

2 is a configuration diagram of an L2 switching hub having a routing function according to an embodiment of the present invention, and FIG. 3 is an exemplary diagram of a CCTV camera connected to an L2 switching hub having a routing function according to an embodiment of the present invention. 4 is an exemplary diagram of a terminal device LAN port that is grouped and assigned as a plurality of each external network LAN port according to an embodiment of the present invention, and FIG. 5 is an exemplary diagram of an address table according to an embodiment of the present invention, and FIG. This is an exemplary diagram of a switching hub equipped with a grouping selection button according to an embodiment of the invention.

A switching hub is provided with a plurality of ports to connect to the network, and compares the destination address of the received frame with the address corresponding to the port registered in the address learning table. The frame is relayed to the port to which the destination terminal is connected. In other words, as a communication device with a switching function used as a concentrator of a terminal when establishing a local area network, it is a hub that improves communication efficiency. Due to its large bandwidth, multiple port inputs can be received at the same time. You can send data.

Switching hubs can be classified into L2 and L3 switches depending on what address they switch with. In the case of the L2 switching hub 100, there is a function of identifying a target using a protocol such as ARP. When a signal comes in, it designates a target to receive the signal and transmits the signal only to that target. Therefore, the price is lower than that of the L3 switching hub, and the setting is convenient, but there is a problem that traffic and speed decrease occurs because all IPs must be transmitted.

The L3 switching hub is a switching hub that has a routing function that changes the physical address (MAC address) to IP and establishes a route using the IP protocol, but it is more expensive than the L2 and has disadvantages in the setup process.

Accordingly, according to the present invention, ports are grouped by IP address in the L2 switching hub 100 so that only the grouped ports are routed, thereby lowering the price and reducing the burden of routing setting.

To this end, the L2 switching hub 100 having a routing function of the present invention is a plurality of LAN ports to which an external LAN line is connected, as shown in FIG. 2, and a unique IP address is assigned to each external network LAN port 110. An external network LAN port 110 and a terminal device LAN port 120 that is grouped and assigned as a plurality of each external network LAN port 110 as a LAN port to which the terminal device is connected, and connected to the terminal device LAN port 120 A data packet having a unique IP address allocated to each external network LAN port 110 and an address table 130 in which the MAC address of each terminal device is stored for each unique IP address allocated to the external network LAN port 110 is received If so, it includes a routing processor 140 for retrieving information on a device LAN port having a MAC address in the received data packet from the address table 130 and routing it to the searched device LAN port. It will be described in detail below.

The external network LAN port 110 is a plurality of LAN ports to which an external LAN line is connected. For example, a LAN line through a gateway such as a router is connected to the external network LAN port 110. Each external network LAN port 110 is provided with, for example, four external network LAN ports 110, and a unique IP address is assigned to each external network LAN port 110 of each external network. For example, a unique IP address of 192.168.0.1 is allocated to the external network first LAN port 111, a unique IP address of 192.168.10.1 is allocated to the external network second LAN port 112, and the external network third LAN port. A unique IP address of 192.168.20.1 may be assigned to (113), and a unique IP address of 192.168.30.1 may be assigned to the fourth LAN port 114 of an external network. To allocate a unique IP address to the external network LAN port 110, the IP address may be assigned through a notebook connected to a USB terminal (not shown) provided in the L2 switching hub 100.

The terminal device LAN port 120 is a LAN port to which the terminal device is connected. Here, the terminal device may be, for example, an IP-based CCTV camera. Each CCTV camera is connected to the terminal device LAN port 120 as shown in FIG. 3 so that the video data packet captured by the CCTV camera can be transmitted to an external network through the terminal device LAN port 120 through the TCP/IP protocol. do.

When the number of external network LAN ports 110 is implemented as N, and each external network LAN port 110 is grouped and assigned as M number of terminal device LAN ports 120, the total number of terminal device LAN ports 120 is N× It is implemented as M. For example, when the external network LAN ports 110 are implemented as 4 (N), and grouping is allocated as 4 (M) terminal device LAN ports 120 for each external network LAN port 110 , The total number of terminal device LAN ports 120 is implemented as 16 terminal device LAN ports 120 of 4×4. Hereinafter, in the present invention, 16 terminal device LAN ports 120 will be described as an example, but it will be apparent that the present invention can be applied to a switching hub having various numbers of LAN ports such as 24 LAN ports and 36 LAN ports. .

The terminal device LAN ports 120 are grouped and allocated as a plurality for each external network LAN port 110. That is, as shown in FIG. 4, the first groups 121 and #1 of the terminal devices 1, 2, 3 and 4 are grouped and assigned to the external network first LAN port 111, and the external network 2 The second group (122, #2) of the terminal devices 5, 6, 7, and 8 is grouped to the LAN port 112, and the terminal devices 9, 10 and 9 are assigned to the third LAN port 113 of the external network. The third group (123, #3) of the 11, 12 LAN ports is grouped, and the fourth group (124, #) of the terminal devices 13, 14, 15, and 16 is assigned to the fourth LAN port 114 of the external network. 4) This grouping is assigned.

The address table 130 is a database in which MAC addresses of each terminal device connected to the terminal device LAN port 120 are stored for each unique IP address assigned to the external network LAN port 110. The MAC address allocation and storage may be performed through a laptop or the like connected to a USB terminal (not shown) provided in the L2 switching hub 100.

For example, as shown in FIG. 5, the unique IP address of 192.168.0.1 allocated to the external network first LAN port 111 in which the terminal device first, second, third, and fourth LAN ports are grouped, is provided by the terminal device. The MAC address, which is the physical address of each terminal device 1, 2, 3, and 4 connected to the 1, 2, 3, 4 LAN ports, is stored.

Similarly, in the unique IP address of 192.168.10.1 allocated to the second LAN port 112 of the external network in which the terminal devices 5, 6, 7, and 8 are grouped, the terminal devices 5, 6, 7, and 8 LAN ports The MAC address, which is the physical address of each terminal device 5, 6, 7, and 8 connected to is stored.

Similarly, in the unique IP address of 192.168.20.1 allocated to the external network third LAN port 113 in which the terminal device LAN ports 9, 10, 11, and 12 are grouped, the terminal device LAN ports 9, 10, 11 and 12 The MAC address, which is the physical address of each terminal device 9, 10, 11, and 12 connected to, is stored.

Similarly, in the unique IP address of 192.168.30.1 allocated to the external network fourth LAN port 114 in which the terminal devices 13, 14, 15, and 16 are grouped, the terminal devices 13, 14, 15, and 16 LAN ports The MAC address, which is the physical address of each terminal device 13, 14, 15, and 16 connected to, is stored.

When a data packet having a unique IP address assigned to each external network LAN port 110 is received, the routing processor 140 stores information on the device LAN port having the MAC address in the received data packet in the address table 130 Search in and route to the searched device LAN port.

For example, when a data packet having an IP address of 192.168.0.1 as a recipient is received through the external network first LAN port 111, the MAC address in the data packet is extracted, and the extracted MAC address is IP address of 192.168.0.1. It is searched for whether it exists in the address table 130 allocated to the address. If the search result determines that the terminal device having the MAC address extracted from the data packet is connected to the second LAN port of the terminal device, which is a group member of the first LAN port 111 of the external network, the corresponding data packet is transferred to the second LAN port of the terminal device. Routes to the connected terminal device.

Likewise, when a data packet having an IP address of 192.168.10.1 as a recipient is received through the second LAN port 112 of the external network, the MAC address in the data packet is extracted, and the extracted MAC address is the IP address of 192.168.10.1. It is searched for whether it exists in the allocated address table 130. When it is determined that the terminal device having the MAC address extracted from the data packet is connected to the terminal device 7 LAN port, which is a group member of the second LAN port 112 of the external network, the data packet is transferred to the terminal device 7 LAN port. Routes to the connected terminal device.

If the recipient IP address of the data packet received from the external network first LAN port 111 is not an assigned fixed IP address or the MAC address does not exist in the address table 130, the data packet is not routed. Is ignored or discarded. For example, the IP address of the recipient of the data packet received from the first LAN port 111 of the external network is not 192.168.0.1, which is a fixed IP address assigned to the first LAN port 111 of the external network, or the external network is made. 1 If the MAC address extracted from the data packet having the 192.168.0.1 recipient address received from the LAN port 111 does not exist in the address table 130 allocated to the IP address of 192.168.0.1, the data packet is ignored without routing. Or discarded.

On the other hand, grouping the terminal device LAN ports 120 for each external network LAN port 110 may be grouping set and shipped at the time of product shipment. However, in some cases, the user may directly set the grouping. This grouping setting allows the user to change the grouping by accessing the switching hub using a laptop computer.

However, setting through such a notebook connection is difficult for the general public and must be performed by an expert. In order to solve such inconvenience, grouping is implemented by physical mechanical manipulation.

To this end, the switching hub includes a grouping selection button for selecting a terminal device LAN port 120 to be grouped for each external network LAN port 110, as shown in FIG. 6. Accordingly, by pressing the selection button, the terminal device LAN port 120 to belong to each external network LAN port 110 can be determined.

For example, when the first group is selected from the grouping selection button provided in the first LAN port 111 of the external network, it is set as the first group 121 to which the first, second, third, and fourth LAN ports of the terminal device belong. , When the second group is selected from the grouping selection button, it is set as the second group to which the terminal device 5, 6, 7, and 8 LAN ports 122 belong, and when the third group is selected from the grouping selection button, the terminal device It is set as the third group to which the 9, 10, 11, 12 LAN ports 123 belong, and when the fourth group is selected from the grouping selection button, the fourth group to which the terminal devices 13, 14, 15, and 16 belong ( 124). Therefore, when a failure of the terminal device LAN port belonging to a specific group occurs, the user can easily change the terminal device LAN port of another group with a simple button operation.

On the other hand, when the MAC address recorded in the data packet having the unique IP address allocated to any one of the external network LAN ports 110 is not retrieved from the address table 130 of the unique IP address, the routing processor 140 Routing is performed according to the routing method selected by. This is for efficient routing, and the user can select dynamic routing when he does not want to miss any data packet, and can select static routing that is discarded in the case of data packets that are considered unimportant.

To this end, the switching hub may further include a routing selection button (not shown) for selecting static routing or dynamic routing.

When the routing processor 140 is not searched in the address table 130 of the assigned unique IP address, the MAC address recorded in the data packet having the unique IP address assigned to any one of the external network LAN ports 110 Data packet discard or MAC address re-search is performed according to the routing method selected by the routing selection button.

That is, when static routing is selected by the routing selection button, MAC addresses that are not searched are discarded. On the other hand, when dynamic routing is selected by the routing selection button, the MAC address table 130 of the unique IP address allocated to the external network LAN port 110 other than the external network LAN port 110 from which the data packet is received is selected. Re-search the address.

For example, a data packet having a recipient IP address of 192.168.0.1 and a MAC first address of 192.168.0.1 is received through the first LAN port 111 of the external network, and the MAC first in the address table 130 allocated to 192.168.0.1. It is assumed that the address was not searched as a result of searching.

When static routing is selected in a state that is not searched in this way, the received data packet is discarded. On the other hand, when dynamic routing is selected, in the address table 130 allocated to 192.168.10.1 of the second LAN port 112 of the external network other than 192.168.0.1 of the first LAN port 111 of the external network, the MAC in the MAC address table 130 The first address is searched, and if it is not found, the MAC first address is searched in the address table 130 allocated to 192.168.20.1 of the third LAN port 113 of another external network, and this is also not found. In this case, the MAC first address is searched in the address table 130 allocated to 192.168.30.1 of the fourth LAN port 114 of another external network. This is to prevent loss of the data packet if the data packet is transmitted by accidentally recording the IP address of the receiver by mistake.

On the other hand, when the terminal device is implemented as a CCTV camera, the routing processor 140 transmits the video data packet photographed by the CCTV camera to the external network through the terminal device LAN port 120, which is a high-definition video data packet. The data size can be large. In the case of such a high-capacity video data packet, there is a risk of data packet loss.

In consideration of this point, the switching hub includes a temporary buffer between the external network LAN port 110 and the terminal device LAN port 120. When the routing processor 140 is not searched in the address table 130 of the assigned unique IP address, the MAC address recorded in the data packet having the unique IP address assigned to any one of the external network LAN ports 110 The video data packet of the terminal device having the MAC address that is not searched is stored in a temporary buffer, so that the video data packet stored in the temporary buffer can be checked by an administrator later.

The embodiments in the description of the present invention described above are presented by selecting the most preferable examples to aid the understanding of those skilled in the art among various possible examples, and the technical idea of the present invention is not necessarily limited or limited only by this embodiment. , Various changes and modifications, and other equivalent embodiments are possible within the scope of the technical spirit of the present invention.

100: L2 switching hub
110: External network LAN port
120: terminal device LAN port
130: Address table
140: routing handler

Claims (5)

A plurality of LAN ports to which an external LAN line is connected, the external network LAN port to which a unique IP address is assigned to each external network LAN port;
A LAN port to which a terminal device is connected, comprising: a terminal device LAN port that is grouped and assigned as a plurality of LAN ports for each external network;
An address table in which MAC addresses of each terminal device connected to the terminal device LAN port are stored for each unique IP address assigned to the external network LAN port;
When a data packet having a unique IP address assigned to each external network LAN port is received, routing to search the device LAN port information having the MAC address in the received data packet from the address table and route it to the searched device LAN port Processor; And
Includes; a routing selection button for selecting static routing or dynamic routing,
The routing processor is a routing method selected by the routing selection button when the MAC address recorded in a data packet having a unique IP address allocated to any one external network LAN port is not retrieved from the address table of the unique IP address. According to the data packet discard or MAC address re-search,
When static routing is selected by the routing selection button, unsearched MAC addresses are discarded, and when dynamic routing is selected by the routing selection button, an external network other than the external network from which the data packet is received The MAC address is searched in the address table of the unique IP address assigned to the LAN port.
The terminal device is implemented as a CCTV camera,
The routing processor transmits the video data packet photographed by the CCTV camera to the external network through the terminal device LAN port,
It further includes a temporary buffer provided between the LAN port of the external network and the LAN port of the terminal device,
If the MAC address recorded in the data packet having the unique IP address allocated to any one external LAN port is not searched in the address table of the unique IP address, the routing processor is L2 switching hub having a routing function, characterized in that storing data packets in the temporary buffer.
The method according to claim 1,
When the number of external network LAN ports is implemented as N, and each external network LAN port is grouped and allocated as M number of terminal device LAN ports, the total number of terminal device LAN ports is N×M. L2 switching hub.
The method of claim 2, wherein the switching hub,
Includes; a grouping selection button for selecting a terminal device LAN port to be grouped for each external network LAN port,
L2 switching hub having a routing function, characterized in that the terminal device LAN port to belong to each external network LAN port is determined by pressing the selection button.
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