JPH03124138A - Bridge device - Google Patents

Abstract

PURPOSE:To surely inform the operating state of a bridge device by displaying reception at the reception of a communication data, sending the communication data to other network when the received communication data is able to be relayed and displaying the end of relay, and aborting the communication data when the relay is disabled and displaying the end of abort. CONSTITUTION:When a frame is sent from a network and received by reception circuits 15a, 15b in a bridge 7, a control circuit 13 outputs a control signal to a multivibrator 21a to light an LED 23a. when the frame is received and stored in buffers 17a, 17b, the control circuit 13 collates a frame destination address with an address registered in advance in a table and when the both are coincident, the frame stored in the buffers 17a, 17b is sent to the network of the destination address, outputs a control signal to a multivibrator circuit 21b to light an LED 23b. When dissident, the frame stored in the buffers 17a, 17b is aborted and a control signal is outputted to a multivibrator circuit 21c to light an LED 23c.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention is directed to a bridge device that controls the relaying of communication data of different networks, and particularly to a bridge device that reliably displays the relaying operation of the bridge device. The present invention relates to a bridge device.

(Prior art) For example, a bridge used in an Ethernet type LAN (local area network)
A frame, which is communication data, transmitted from a workstation or the like connected by the AN is received. Based on the received frame, the bridge compares the destination address of the frame with an address registered in advance in a table within the bridge. When the destination address is registered in the table after verification, the bridge transmits the received frame to another LAN indicated by the destination address. Further, when the bridge receives or transmits a frame, the bridge notifies the reception or transmission of the bridge by, for example, lighting a lamp to display the state in which the frame has been received or transmitted.

(Problem to be Solved by the Invention) However, in the bridge, when the lamp indicating transmission is off, there is no frame to be transmitted (relayed), or the light is off due to a device failure. I can't tell the difference. Furthermore, since the lamp is driven by physical signals for transmission and reception, there is no notification as to whether reception or transmission has been reliably completed, so there is a problem in that it is not possible to accurately determine whether or not the operating state of the bridge is normal.

The present invention has been made in view of the above, and its purpose is to display the relay operation and accurately notify the operating status of the device, so that even if a failure occurs in the device, for example, it can be dealt with quickly. An object of the present invention is to provide a bridge device that improves the performance of the device.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides a bridge device that controls relaying of communication data between different networks, in which communication data transmitted from the network is a reception display means for displaying reception of the communication data when received; a relay determination means for determining whether or not the communication data can be relayed when the reception display means receives the communication data; Means for transmitting the communication data to another network via a communication network and displaying relay completion when the data can be relayed, and for discarding the communication data and displaying the completion of discard when the communication data cannot be relayed. The main point is that we have prepared for this.

(Operation) In the bridge device having the above configuration, when communication data is received from a certain network, reception is displayed. Then, it is determined whether the received communication data can be relayed. When it is determined that the communication data can be relayed, the communication data is transmitted to another network and relay completion is indicated, and when the communication data cannot be relayed, the communication data is discarded and discard completion is displayed. This makes it possible to reliably notify the operating state of the bridge device.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a block diagram showing the configuration of a system in which a bridge 7 of the present invention is installed.

When the bridge 7 receives the communication data, it determines whether the received communication data can be relayed or not, and when the relay is possible, displays transmission completion after transmitting the communication data,
When the received communication data cannot be relayed, the communication data is discarded and the discard completion is displayed.

The system in which the bridge 7 is installed is a host computer 1. coaxial cable 3 and transceiver 5a,
5b.

The host computer 1 connects one magnetic disk and one printer to a plurality of terminals, and transfers communication data (frames) transmitted via a coaxial cable 3 from a workstation 11 (described later) to the magnetic disk. It has functions such as a so-called file server for storing data, or a so-called print server for printing from a printer.

The coaxial cable 3 is used to transmit communication data sent from the host computer 1 and the bridge 7.

On the coaxial cable 3 is a transceiver 5a that includes a transmitter and a receiver housed in a common cylinder.

5b is provided to transmit and receive communication data transmitted from the host computer 1 or the bridge 7.

Further, the bridge 7 is connected to the LAN media 9.

The bridge 7 enables communication between different LAN media and acts as a relay between the host computer and a workstation 11, which will be described later, and will be described in detail later.

The LAN media 9 has a wiring configuration such as a twisted pair such as a star LAN.
A plurality of workstations 11 are connected as terminals.

The configuration of the bridge 7, which is the bridge device of the present invention, will be explained using the block diagram of FIG. 2.

The bridge 7 includes a control circuit 13. Receiving circuit 15.15
b, buffers 17a, 17b and transmission circuits 19g, 1
9b.

The control circuit 13 controls the entire bridge 7, and controls determination as to whether or not a frame received from the workstation 11 or the like can be relayed.

The receiving circuits 15a, 15b write frames received from the host computer 1 or workstation 11 to predetermined addresses in the buffers 17a, 17b.

Buffers y17a and 17b are the receiving circuit 15a.

15b is stored at a predetermined address.

When the control circuit 13 determines that the frame can be relayed and a control signal is output, the transmitting circuits 19a and 19b transmit the frame written in the buffers 17a and 17b to the model 9 whose destination address points to the frame, for example. The data is sent to the host computer 1 or workstation 11.

Here, the circuit configuration for displaying the operation of the bridge 7 will be explained using FIG. 3.

The control circuit 13 of the bridge 7 includes a multivibrator 21
a, 2lb, 21c, and furthermore, multivibrators 21a to 21c are connected to LE, respectively.
D 23 a ~ 23 c, limiting resistance 25 a ~ 25
This configuration is connected to a reference power source Vcc (5V) via a power source Vcc (5V).

When the frame is received by the aforementioned receiving circuits 15a and 15b, the control circuit 13 outputs a control signal to the multivibrator 21a. When a control signal is input, the multivibrator 21a is an oscillator that alternately turns ON and OFF by positive feedback of the output of the resistive coupled amplifier to the input side, and amplifies the control signal until it is visible to humans. The extended electrical signal is output to the LED 23a.

The LED 23a converts an input electrical signal into light and lights up. This notifies that the frame has been received.

Note that the limiting resistors 25a to 25c connected to the LEDs 23a to 23C limit the current flowing from the reference power source Vcc.

In addition, the multivibrators 21a to 21C1L E
D 23 a ~ 23 c, limiting resistance 258 ~ 25
C and the like are well-known techniques, and there is no need to perform complicated operations when applying them to this embodiment.

Next, the operation of this embodiment will be explained using the processing flowchart shown in FIG.

First, after power is turned on to the bridge 7 and the like, the system is started and a frame is transmitted from the workstation 11, for example. When the receiving circuits 15a and 15b receive a frame from the workstation 11, the control circuit 13 outputs a Mal signal to the multivibrator 21a. When the control signal is input, the multivibrator 21a outputs an electric signal to the LED 23a by expanding the control signal to a time visible to humans. The LED 23a converts a human-powered electric signal into light and lights up. This results in
The completion of reception is notified (steps 100 to 110).

When a frame is received and stored in the buffers 17a and 17b, the control circuit 13 compares the destination address (DA) stored in the frame with an address registered in advance in a table (not shown). When the above destination address matches the address registered in the table by comparison, the control circuit 13 transmits the frame stored in the buffers 17a and 17b to the destination address pointed to, for example, the host computer 1, and confirms that the address is the same. If not, proceed to step 150. Further, the control circuit 13 outputs a control signal to the multivibrator 21b. The multivibrator 21b, like the multivibrator 21a, expands the control signal and outputs an electric signal, thereby increasing the LE.
D23b is turned on (steps 120 to 140).

Proceeding to step 150, the control circuit 13 discards the frames stored in the buffers 17a and 17b and releases the buffers because the frames are not to be relayed. Also,
The control circuit 13 turns on the LED 23c by outputting a control signal to the multivibrator 21c (steps 150 to 160).

From the above, when the LED 23a is lit, reception is complete and the LE
When D23b turns on, transmission is complete, and LED23c
When lit, it indicates that data has been discarded, so the operating status of the bridge can be reliably notified.

As described above, the present invention can be implemented with various modifications within the scope of the invention.

[Effects of the Invention] As explained above, according to the present invention, by accurately reporting the operating status of the device, even if a failure occurs in the device, it can be quickly dealt with, thereby improving the performance of the device. realizable.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of a system in which the bridge device of the present invention is installed, Fig. 2 is a block diagram showing the configuration of the bridge device of the present invention, and Fig. 3 shows the operating state of the bridge device. FIG. 4 is a block diagram showing the circuit configuration and a flow chart showing the operation of the present invention. 1... Host computer 3... Coaxial cable 7... Bridge 11... Work station 13... Control circuits 15a, 15b... Receiving circuits 17a, 17b... Buffers 21a to 21c... Multivibrator 23 a ~
23 c ・L E D 25a~25c...Limiting resistance

Claims (1)

[Scope of Claims] A bridge device that controls relaying of communication data between different networks, comprising: reception display means for displaying reception of communication data when communication data transmitted from the network is received; relay determining means for determining whether or not the communication data can be relayed when the communication data is received by the means; and a relay determining means for determining whether or not the communication data can be relayed; 1. A bridge device comprising: means for displaying completion of relaying by transmitting data to the communication data, and discarding the communication data and displaying completion of discard when the communication data cannot be relayed.