JP2001119424A - Network equipment - Google Patents

Abstract

(57) [Problem] To easily and appropriately obtain a connection position of a desired device in a LAN. A search-side network device including a transmission control unit that controls transmission of a search packet for searching a route including a repeater in a network to a target device to which an IP address to be searched is allocated. A network device comprising return control means 23 for receiving a search packet from the search-side network device and detecting a search packet addressed to the own device, and returning a search response packet addressed to the transmission source. And a relay information adding unit that relays the search packet and the search response packet and, when relaying the search response packet, adds information of the own device to the search response packet. I do.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method of assigning a connection location of a device, that is, an IP address to be searched, based on an IP address in a LAN (Local Area Network) using a TCP / IP protocol. The present invention relates to a network device for realizing a search for a route including a repeater in a network to a target device.

[0002]

2. Description of the Related Art Conventionally, in a LAN, if there is a device that constantly sends out a broadcast packet due to a failure, for example, and a problem is caused in the entire LAN, the device that is the source of the failure is searched for as follows. I have.

For example, an IP obtained from the broadcast packet in a LAN network manager or the like.
Find the device at the address. First, ARP (Addres
s Resolution Protocol) table is displayed, the MAC (Media Access Control) address of the corresponding IP address is checked, and the MAC address table of the network device such as a bridge or switching HUB (hub) is displayed. The connection location of the device was specified.

[0004]

Therefore, the longer the route including the repeater in the network to the target device, that is, the greater the number of repeaters, the more the number of MAC address tables to be displayed increases. There was a problem that took time to search.

The present invention has been made in view of such a problem in a conventional network, and has as its object to provide a network device capable of easily and appropriately obtaining a connection position of a desired device in a LAN. That is.

[0006]

A network device according to the present invention controls a transmission of a search packet for searching a route including a repeater in a network to a target device to which an IP address to be searched is allocated. A transmission control unit for performing information transmission, a display unit for displaying information, and a search response packet returned from the target device with respect to the search packet transmitted by the transmission control unit, to which information about a relay to be relayed can be added. Display control means for displaying the information on the route on the display means based on the information of the repeater included in the search response packet. As a result, based on the information of the repeater included in the search response packet returned from the target device in response to the search packet, the information on the route is displayed, and the relay on the route to the target device is displayed. The route including the vessel becomes clear.

[0007] The network device according to the present invention is characterized in that the display control means displays an image indicating the connection relationship between the repeater and the target device. Thereby, the route including the repeater on the route to the target device is clarified by the image.

The network device according to the present invention comprises transmission control means for controlling transmission of a search packet for searching a route including a repeater in a network to a target device to which an IP address to be searched is allocated. Upon receiving a search packet from the search-side network device provided and detecting that the search packet is addressed to the own device,
It is characterized by comprising a return control means for returning a search response packet to which the information of a relay device to which a relay device can be added can be added to a transmission source as a destination. As a result, the search response packet to which the information of the relay device to be relayed to the transmission source is added is returned.

The network device according to the present invention comprises transmission control means for controlling transmission of a search packet for searching a route including a repeater in a network to a target device to which an IP address to be searched is allocated. When a search packet is received from the search-side network device and a search packet from the search-side network device, and it is detected that the search packet is addressed to the own device, the information of the relay device to be relayed to the transmission source can be added. A network device provided with a return control means for returning a search response packet, the network device is provided with a network device that relays the search packet and the search response packet. A relay information adding means for adding information of the own device to the response packet is provided. As a result, the search packet and the search response packet are relayed, and the information of the relaying device is added to the search response packet.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A network device according to an embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a configuration of a network device according to an embodiment of the present invention. The network device is a terminal such as a personal computer or a network manager. This device has a C that controls the entire device.
PU1 is provided. The CPU 1 performs control using data and programs stored in the main memory 2.

A display controller 4, an input controller 5, a storage controller 6,
The communication controller 7 is connected. The display controller 4 controls display on a display device 14 such as a CRT or an LCD to be connected. The input controller 5 performs control to capture operation data of the input device 15 such as a connected keyboard or pointing device. The storage controller 6 performs control of writing data to or reading data from a storage device 16 such as a magnetic disk device or a magneto-optical disk connected thereto. The communication controller 7 controls transmission and reception of data and commands between the connected communication device 17 and the CPU 1. The communication device 17 is connected to a LAN via a line and performs communication according to the TCP / IP protocol.

The main memory 2 is provided with a transmission control means 21, a display control means 22, and a return control means 23 realized by a program. The transmission control unit 21 controls transmission of a search packet for searching a route including a repeater in a network to a target device to which an IP address to be searched is allocated. The display control unit 22 receives the search response packet returned from the target device with respect to the search packet transmitted by the transmission control unit 21, and based on the information of the repeater included in the search response packet, The information is displayed on the display device 14 as a display means.

FIG. 2 shows the configuration of a network device according to another embodiment of the present invention. This network device is a network repeater such as a bridge or a switching hub. The control unit 30 is configured by a computer including a CPU and a memory, and relays TCP / IP packets.
The control unit 30 and a plurality of ports 3 connected to the LAN
1-1 to 31-n.

The control unit 30 is provided with relay information adding means 40 realized by a program. The relay information adding means 40 receives a search packet for searching for a route including a relay in the network to the target device to which the IP address to be searched is allocated, and receives the search packet, and receives the search packet addressed to its own device. When it is detected that there is, a search response packet to which information of a relay device to be relayed to the transmission source can be added can be relayed. When relaying the search response packet, the relay information adding means 40 adds information of the own device to the search response packet.

FIG. 3 shows a format of the search response packet. The search response packet includes an IP head including a source address, a destination address, and information indicating that the packet is a search response packet, and additional information from the repeater is added. The additional information for one repeater includes an IP address, an attribute, a reception port number, and a transmission port number. The IP address is the address of the repeater, and the attribute is information on the type of the repeater, and is information indicating which of a switch HUB, a router, a bridge, and the like. The reception port number is the number information of the port that has received the search response packet in the repeater, and the transmission port number is
This is the number information of the port that transmitted the search response packet in the repeater.

A case will be described in which a network is configured using the network devices shown in FIGS. 1 and 2 and the connection location of required equipment is specified. For example, a personal computer (P
C) is PC-A, and its IP address is IP-A. Also, the search target device is OBJ, and its IP address is IP-O.

Then, as shown in FIG. 4, a LAN whose IP address is IP-SWA is located between the personal computer PC-A of the investigation source and the search target device OBJ.
Switch A, router whose IP address is IP-R, I
LAN switches B and I whose P address is IP-SWB
It is assumed that a bridge having a P address of IP-BR and a LAN switch C having an IP address of IP-SWC intervene. The numbers indicate port numbers.

Investigation source personal computer PC-A
And the search target device OBJ have the configuration shown in FIG.
The AN switch A, the router, the LAN switch B, the bridge, and the LAN switch C have the configuration shown in FIG. Then, the transmission control means 21 of the investigation-source personal computer PC-A transmits a search packet with the destination address being IP-O to the search target device OBJ.

The LAN switch A, the router, the LAN switch B, the bridge, and the LAN switch C relay ordinary IP packets to the search packet. That is, if the destination address of the search packet is a learned IP address, the switch or bridge transfers the search packet to the corresponding port. If the destination address is an unlearned IP address, the switch or bridge transmits the search packet to all ports. Also, the router performs routing based on the IP network address in the destination address of the search packet.

In this way, the search packet reaches the search target device OBJ, and upon receiving the search packet, the target device OBJ creates a search response packet based on the search packet header and generates a search response packet based on the search packet.
A packet addressed to CA is sent back (return control means 23). The control so far is the same as the operation up to the echo back by the Ping command in ICMP (Internet Control Message Protocol).

The search response packet sent from the target device OBJ passes through the LAN switch C. At this time, by the processing of the relay information adding means 40, the IP address and the attribute (switch or router or bridge) of the LAN switch C and the port number and the transfer destination of the search response packet are transferred to the message part of the search response packet. The received port is described.

Hereinafter, the bridge, the LAN switch B, the router, and the LAN switch A, similarly to the LAN switch C, search for the IP address of their own device, the attribute, the port number at which the search response packet was received, and the port number at which it transmitted. It is sequentially added to the message part of the response packet.

The search response packet finally arrives at the personal computer PC-A of the investigation source.
The information of the message part in the search response packet returned from the target device OBJ (IP-O) in this manner is:
It is as shown in FIG. The display control means 22 of the personal computer PC-A sequentially displays the information of the message portion of the received search response packet, for example, from the last information (IP-SWA, SW, 1, 0).

The display control means 22 of the personal computer PC-A processes the information of the message part of the received search response packet, puts the type in the block,
An IP address is arranged in the vicinity of the block, a port number is written in a numeral, and image data as shown in FIG. 4 is created corresponding to the route to the target device OBJ, and is sent to the display controller 4 to be displayed on the display device. 14 is displayed.

Further, when the PC-A is a device having a network diagram or a network component device management table, such as a network monitoring device, the CPU 1 stores the network device and the target device in the network diagram based on the information collected as described above. A route is added, information is added to the management table, and the information is stored in, for example, the storage device 16. In this case, the obtained network diagram is, for example, as shown in FIG. 6, and the display control unit 22 can send the image data of this network diagram to the display controller 4 and display it on the display device 14.

As described above, according to the present embodiment, the information of the route to the target IP address and the connection location of the device can be obtained from the network device of the investigation source only by transmitting one command. can do.

In the above embodiment, the investigation source and the target device have been described as network devices shown in FIG. 1. However, return control means 2 is provided in the investigation source network device.
3 may not be provided, and the network device of the target device may not include the transmission control unit 21 and the display control unit 22.

[0028]

As described above, according to the network device of the present invention, the route is determined based on the information of the repeater included in the search response packet returned from the target device in response to the search packet. Since the information is displayed, the route including the repeater on the route to the target device becomes clear.

According to the network device of the present invention, since the image indicating the connection relationship between the repeater and the target device is displayed, the route including the repeater on the route to the target device is clarified by the image. .

According to the network apparatus of the present invention, when a search packet is received and it is detected that the search packet is addressed to the own apparatus, a search response to which a source is set as a destination and information of a relay to be relayed can be added. Since the packet is returned, the information of the repeater can be obtained from the search response packet, and the route information can be obtained appropriately.

According to the network device of the present invention, when the search packet and the search response packet are relayed and the search response packet is relayed, the information of the own device is added to the search response packet. The information of the relay device is added to the response packet, and the route information can be appropriately obtained from the information.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a network device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a network device according to another embodiment of the present invention.

FIG. 3 is a diagram showing a format of a search response packet used in the embodiment of the present invention.

FIG. 4 is a diagram showing a network configured by employing the network device according to the embodiment of the present invention;

FIG. 5 is a diagram showing information of a message part in a search response packet.

FIG. 6 is a diagram showing an example of a network diagram obtained by the network device according to the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 CPU 2 Main memory 3 Bus 4 Display controller 5 Input controller 6 Storage controller 7 Communication controller 14 Display device 15 Input device 16 Storage device 17 Communication device 21 Transmission control means 22 Display control means 23 Return control means 30 Control unit 31-1 31-
n port 40 relay information adding means

Claims (4)

[Claims] 1. A transmission control means for controlling transmission of a search packet for searching a route including a repeater in a network to a target device to which an IP address to be searched is allocated, and a display means for displaying information. Receiving a search response packet returned from the target device with respect to the search packet transmitted by the transmission control means and adding repeatable relay information to the repeater information included in the search response packet. And a display control means for displaying information related to the route on the display means. 2. The network device according to claim 1, wherein the display control means displays an image indicating a connection relationship between the repeater and the target device. 3. A search-side network device comprising transmission control means for controlling transmission of a search packet for searching a route including a repeater in a network to a target device to which an IP address to be searched is allocated. And a return control means for returning a search response packet to which information of a relay device to be relayed can be added when a search packet is received from the device and the packet is detected as a search packet addressed to the own device. Network device. 4. A search-side network device comprising transmission control means for controlling transmission of a search packet for searching a route including a repeater in a network to a target device to which an IP address to be searched is allocated. When,
Upon receiving the search packet from the search-side network device and detecting that the search packet is addressed to the own device,
A network device having a transmission control unit for returning a search response packet to which information of a relay device to be relayed can be added to a transmission source, provided in a network, and relaying the search packet and the search response packet. And a relay information adding means for adding information of the own device to the search response packet when relaying the search response packet.