JPH11261583A - Local area network managing system provided with ip address allocating function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform efficient management of a local area network (LAN) with a network managing device by providing network managing techniques with which a network connector can allocate to IP addresses to plural network devices. SOLUTION: This system is composed of a network connector 3 connected to a segment 1 and one managing device 4 for managing that connector, and the network connector 3 is provided with plural ports 3a-3n, memory table for holding IP addresses applied to the respective ports and function for allocating these IP addresses to network devices 5a-5n connected to the relevant ports. Besides, the managing device 4 is provided with a function for owning data 6, in which the IP address to be applied to each port of the network connector 3 and the port corresponding to that IP address are described, and transferring these data to the network connector 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique which is effective when applied to a local area network, particularly to an efficient operation management of the local area network.

[0002]

2. Description of the Related Art Conventionally, as a technique for efficiently managing the addition, movement, and configuration of computers in a local area network, a network device is dynamically assigned an IP address.
DHCP servers that assign addresses are known.
That is, if the network device serving as the client is TC
When P / IP is started, it sends a "search message" to check whether a DHCP server exists, and the DHCP server that receives it sends a "search message" that is used within the range of IP addresses managed by the server itself. The client network device that has no IP address, and the client network device that has received the IP address sends an “accept message” to the DHCP server,
The P server makes the assigned IP address in use and does not assign it to other clients.

[0003]

However, according to the above technique, the same IP address is not always assigned to the network device as a client every time the network device as a client is started. Therefore, it becomes difficult for the network management device that manages each network device connected to the local area network to associate the mac address uniquely owned by the network device with the assigned IP address.

[0004] Further, it is difficult for a network administrator to take direct measures when a user freely connects a network device to a network connection device and illegally uses a local area network.

Accordingly, an object of the present invention is to provide a local area network management technique capable of assigning a fixed IP address to each of a plurality of network devices by a single network connection device. It is to manage the network efficiently.

[0006]

The present invention comprises one network connection device connected to a network and one management device for managing the network connection device. The network connection device is a network device using TCP / IP. A plurality of ports for connecting to a local area network, a memory table for holding an IP address given by the management device to each of the ports, an IP address transferred from the management device, and a port corresponding thereto Is provided with a function of receiving data in which is described, and a function of assigning a specified IP address to a specified port based on the data.

[0007] The management device has a function of editing the data in which the IP address assigned to each port of the network connection device and the port corresponding thereto are described, a function of editing the data, and a function of transferring the data to the network connection device. It is provided.

The present invention has the above configuration, and the network connection device can hold an IP address to be assigned to the network device for each port, so that the network device activates TCP / IP. The same IP address is assigned each time. Therefore, the network device connected to the local area network can be prevented from a network failure in which the IP address and the mac address do not correspond.

Further, the network connection device provided by the present invention provides a connection to a local area network because an IP address is not assigned to a network device connected to a port to which an IP address has not been assigned from a management device. Can be prevented. Therefore, an unauthorized use of the local area network due to the user's accidental connection to the network connection device can be suppressed from the administrator side.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Explanation of Configuration) Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 schematically shows an example of the configuration of a local area network according to this embodiment. The local area network according to the present embodiment includes a segment 1 which is an independent data transmission path. The segment 1 is connected to a network management device 2 for managing individual network devices connected to the local area network, a network connection device 3, and a management device 4 for managing network connection devices. Network devices 5a to 5n are connected to a plurality of ports 3a to 3n provided in the device 3, respectively.

FIG. 2 shows an ISO (International Organizati).
on for Standardization: OSI (Open System Inte), a standard model for data communication defined by the International Organization for Standardization
rconnection: Open system interconnection) Each layer divided into seven layers (layers) of the reference model,
It shows the positioning of the TCP / IP protocol. TCP / I
P is located at the transport layer and the network layer of the OSI reference model, and provides transparent data communication between different systems. In the present invention, data transfer from the management device 4 to the network connection device 3 and assignment of an IP address from the network connection device 3 to the network device 5 are performed according to the TCP / IP protocol implemented by each device.

(Explanation of Operation) The management device 4 performs centralized management of each port of the network device and the assigned IP address. FIG. 3 is an example of data constituted by a function of the management device 4 for editing data of the network connection device and the port corresponding thereto. The IP address corresponding to each of the ports 3a to 3n provided in the network connection device 3 is described. For example, for the port number 3a, the IP address 10.0.0.
1, IP address 10.0.0.2 for port number 3b
, An IP address assigned to each port can be designated. Also, by leaving the IP address entry blank as in the case of the port number 3n, it is possible to specify that the IP address is not assigned to the port. The configured data 6 is transferred to the network connection device 3 by the transfer function provided in the management device 4.

The network connection device 3 receives the data transferred from the management device 4, and writes the IP address in a memory table 7 provided in the network connection device 3 as shown in FIG. 4 based on the data. Thereby, the corresponding IP address is assigned to each port of the network connection device 3. Alternatively, access to the local area network from the network device 5n connected to the port 3n for which no IP address is specified can be restricted.

(Other Embodiments) In the above embodiment,
Although the network connection device 3 receives the data transmitted from the management device 4, the network connection device 3 may go to get the data stored in the management device 4. The storage location of the data may be stored in a device that functions as a file server existing in the same or another segment as long as data can be exchanged with the network connection device 3. The management device 4 may manage a plurality of network connection devices collectively by one management device as long as the management device 4 can manage a plurality of data in which ports and IP addresses are associated with each other. In particular, centralized management of network connection devices over a plurality of segments is facilitated. In addition, some or all of the functions of the management device 4 may be integrated into the network management device 2 so that the network management device 2 manages the network connection device 3.

[0016]

According to the present invention, the network connection device 3 receives an IP address assigned to its own port from the management device, so that the network connection device 3 is assigned an IP address for each port. Since the present invention has the above configuration, the same IP address is assigned to the network device 5 connected to a certain port of the network connection device 3 every time TCP / IP is started. Therefore, the IP address and the mac specific to each network device
A network failure due to an incompatibility with the address can be prevented, and the network management device can efficiently manage the local area network.

Further, by setting one or more ports for which no IP address is specified, the connection of the network device connected to the port to the local area network is suppressed. This is because the network device is connected to a port to which no IP address has been assigned, and therefore no IP address is assigned. Therefore, by performing the above setting, the network connection device can prevent the unnecessary or illegal network device from connecting to the local area network. Therefore, the local area network operates stably, and the network management device can perform efficient local area network management.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram schematically showing an example of a configuration of a local area network according to an embodiment of the present invention.

FIG. 2 shows seven layers (layers) of an OSI reference model and T
FIG. 3 is a model diagram showing positioning with CP / IP.

FIG. 3 is a conceptual diagram showing a configuration of data transferred to a network connection device.

FIG. 4 is a conceptual diagram showing a configuration of a memory table of the network connection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... segment, 2 ... network management apparatus, 3 ... network connection apparatus, 3a ... port, 3b ... port, 3c ... port, 3n ... port, 4 ... management apparatus, 5a ... network apparatus, 5b ... network apparatus, 5c ... network Device, 5n: network device, 6: data, 7: memory table.

Claims (2)

[Claims] 1. A network connection device connected to a network and a management device for managing the network connection device, wherein the network device includes a plurality of devices for connecting a network device using TCP / IP to the network. And has an IP address given by the management device for each port and a memory for holding the IP address. In a local area network,
A local area network management system comprising means for automatically allocating a fixed IP address for each port to a network device connected to each port of the network connection device. 2. The local area network management system according to claim 1, further comprising means for preventing a network device connected to a port to which an IP address has not been assigned from the management device from connecting to a local area network. .