JPH0548613A - Network relay device - Google Patents

Abstract

(57) [Abstract] [Purpose] The registration of routing information across a plurality of network relay devices is automated by exchanging address information frames between the network relay devices. A frame comparison unit 9 for extracting static address information of a relay route from a received address information frame stored in a reception memory 4, and an address of a destination network and a network through which the address information frame is sent to the destination network. A static address storage unit 10 for storing the address of the relay device, and an address conversion unit 11 for extracting the address of the next network relay device from the address information frame received from the frame comparison unit 9 and converting the destination address. Have. [Effect] The time for setting the routing information can be significantly reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network relay device connected to a local area network for use.
In particular, it relates to improvement of means for registering routing information in the static routing table.

[0002]

2. Description of the Related Art Generally, an operation of registering routing information in a static routing table in a network relay device is performed manually.

A network relay device of this type will be described below with reference to FIG. Network relay device 1
The operator is the console 3 in the static address storage unit 2.
It stores the address of the destination network input from, and the address of the network relay device through which the address information frame is sent to the destination network. The routing information thus input and stored is edited as a transmission address information frame, stored in the transmission memory 4, and sent out to the transmission line 6 via the transmission driver 5. The address information frame sent from another network relay device is received by the reception driver 7 and stored in the reception memory 8 as a reception address information frame. There is also a method of dynamic routing information exchange in which routing information is registered by exchanging address information frames, but when the power of the network relay device is turned off, the routing information disappears.

[0004]

However, in the above network relay device, the operator inputs routing information, which is inefficient. In particular, when registering a route that spans multiple network relay devices in the static routing table, each operator performs registration operation in all network relay devices on the route, so registration is performed with all network relay devices. It is necessary to confirm the consistency of the contents, and there is a drawback that it takes a lot of time.

The present invention solves such a conventional problem. By exchanging address information frames, registration of routing information in the static routing tables of a plurality of network relay devices can be automated. An object is to provide a network relay device.

[0006]

In order to achieve the above object, in the present invention, in a network relay device having a transmission memory, a transmission driver, a reception memory and a reception driver, the data is stored in the reception memory. The frame comparison unit that extracts the static address information of the relay route from the received address information frame and the static address that stores the address of the destination network and the address of the network relay device through which the address information frame is sent to the destination network. It has an address storage unit and an address conversion unit that extracts the address of the next network relay device from the address information frame received from the frame comparison unit and converts the destination address.

[0007]

Since the present invention is configured as described above, by exchanging address information frames, static routing information that spans a plurality of network relay devices can be automatically set.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of a network relay device of the present invention. In the figure, 1
Is a network relay device, 4 is a transmission memory for storing transmission address information frames, 5 is a transmission driver for transmitting transmission address information frames from the transmission memory 4 to the transmission line 6, and 7 is a reception driver for receiving address information frames from the transmission line 6. , 8 is a reception memory for storing the reception address information frame received from the reception driver 7, 9 is a frame comparison unit for extracting static address information of the relay route from the reception address information frame stored in the reception memory 8, and 10 is A static address storage unit that stores the address of the destination network and the address of the network relay device that is passed when the address information frame is sent to the destination network, and 11 is the network relay that is passed next from the address information frame received from the frame comparison unit 9. Extract the device address And an address converting unit that converts the destination address.

FIG. 2 is a diagram showing an example of the format of the address information frame. 22 is the destination physical address, 2
3 is a source physical address, 24 is a destination network address, 25 is a source network address, 26 is a relay device number counter indicating the number of passing network relay devices, and 27 is a passing network relay as routing information of an address information frame. Address data in which the address of the input / output interface of the device is written in order from the source to the destination, 28 is for distinguishing whether the address information frame is used as the transmission frame or the transmission frame Attribute flag.

Next, the operation of the network relay device configured as described above will be described. Now, consider a case where a device connected to a certain network transmits a transmission address information frame to the transmission line 6 toward a certain network relay device. In the destination physical address 22 of the transmission address information frame, the physical address of the next network relay device is the destination network address 24.
Is the network address of the destination network relay device, the source physical address 23 is the source physical address of the device connected to the source network, and the source network address 25 is the source network address. ing. The address of the input / output interface of the network relay device on the relay route is written in the address data 27 in order from the transmission source to the destination, and the number of passing network relay devices is written in the relay device number counter 26.

Next, when a certain network relay device receives via the address information frame reception driver 7 configured in this way, the contents of the destination physical address 22 are checked, and if it matches with its own address, this The address information frame is fetched in the reception memory 8 and passed to the frame comparison unit 9. The frame comparison unit 9 confirms the number of network relay devices on the relay route from the value of the relay device number counter 26 of the address information frame, searches the address data 27 for the network address of the local station, and searches the network data of the own station on the relay route. Recognize the position of the network relay device. Information obtained by extracting the network address of the network not connected to the own network relay device written in the address data 27 and the network address of the address information frame passing when relaying the address information frame to the network. Is stored in the static address storage unit 10, and the address information frame is passed to the address conversion unit 11. The address conversion unit 11 checks whether or not the destination network relay device of the address information frame is the own network relay device, and if it is not the own network relay device, the address data 27 of the address information frame.
The physical address of the network relay device to be relayed next is extracted from, and the extracted physical address is substituted for the destination physical address 22 and passed to the transmission memory 4. The transmission driver 5 sends out the address information frame stored in the transmission memory 4 to the transmission line 6 when all the processes performed in the network relay device are successful.

When the destination network relay device of the address information frame is the own network relay device and the attribute flag 28 is the transmission frame, the source physical address 23 and the source network address 25 of the address information frame are set to the own network relay device. , The order of the pair list of the physical address of the address data 27 and the network address is reversed, and the physical address of the network relay device that relayed this transmission address information frame one before is substituted in the address information frame, The attribute flag 28 is changed from the transmission frame to the reply frame and passed to the transmission memory 4. The transmission driver 5 sends out the address information frame stored in the transmission memory 4 to the transmission line 6 when all the processes performed in the network relay device are successful. When the destination network relay device of the address information frame is the own network relay device and the attribute flag 28 is the reply frame, the network relay device confirms that the relay route setting is completed by receiving the address information frame. To do.

[0013]

As described above, according to the present invention, by exchanging address information frames, static routing information that spans a plurality of network relay devices can be automatically set. The effect is that the time can be greatly shortened.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a configuration example of an address information frame.

FIG. 3 is a block diagram of a conventional network relay device.

[Explanation of symbols]

 1 network relay device 4 transmission memory 5 transmission driver 6 transmission line 7 reception driver 8 reception memory 9 frame comparison unit 10 static address storage unit 11 address conversion unit

Claims (1)

[Claims] 1. A network relay device having a transmission memory, a transmission driver, a reception memory, and a reception driver, wherein static address information of a relay route is extracted from a reception address information frame stored in the reception memory. A frame comparison unit, a static address storage unit that stores the address of the destination network and the address of the network relay device through which the address information frame is sent to the destination network, and the address information frame received from the frame comparison unit A network relay device, comprising: an address conversion unit that extracts an address of a passing network relay device and converts a destination address.