JP3214773B2 - LAN analyzer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a network in which one terminal to which a number of terminals are connected is connected to another network via a repeater such as a bridge or a router. To transmit a test frame from the LAN analyzer.

[0002]

2. Description of the Related Art As shown in FIG. 5, for example, a LAN line is formed by connecting a plurality of networks N _{1 to} Nn to each other via a relay 1 such as a bridge or a router.
Each network N ₁ interposed to N ₆ has been transceiver 2,2 ... to address a terminal Ea (a = 1 to m) are connected.

As shown in FIG. 6, the format of a frame transmitted from each terminal Ea is, as shown in FIG. 6, a flag F, a destination address part DA, a source address part SA, a data part DT, and an error. detection signal FCS, is formed in the order of the flag F, for example, from the network N ₁ transmits a frame, the relay 1 is an address a ₁ recorded in the source address part SA of the frame, and the network N ₁ being connected Stored in the port P ₁ and that the address a ₁ is in the network N ₁ .

[0004] When the next frame of the destination address a ₁ from the network N ₁ to N ₆ has been transmitted, and outputs only the frame to the port P _1, to another port P ₂ to P ₆ Is not output so that L
The signal congestion on the AN line is reduced. That is, the repeater 1 learns where in the networks N _{1 to} N ₆ the address recorded in the source address section SA is located each time a frame passes.

[0005]

However, after a predetermined time has elapsed due to the influence of the aging timer and the like, the data is cleared in the order of learning, so that all addresses of each of the networks N _{1 to} N ₆ are registered. It is very difficult to do so, and there is a problem that signal congestion on the LAN line cannot be sufficiently reduced.

Further, when a new network is added, a frame is transmitted to a terminal of each address in order to confirm whether a frame is transmitted from the network to another network without fail. It is best to look, but in reality there are too many addresses to make such a confirmation. Therefore, the first invention of the present application can quickly register all addresses of each network in a repeater connecting networks, and the second invention of the present application transmits a frame to all addresses of each network. The third invention of the present application has a technical problem to be able to perform both of them.

[0007]

Means for Solving the Problems In order to solve this problem, the first invention of the present application provides a LAN line in which one network connecting a number of terminals is connected to another network via a repeater, From the one network to the LAN
In a LAN system comprising a LAN analyzer for transmitting a test frame to any network in a line, the LAN analyzer transmits a test frame formed by a test frame forming means for forming a test frame and a test frame formed by the test frame forming means. Test frame transmitting means for transmitting to any of the networks,
An arbitrary destination address is set in a destination address part of the test frame, and a minimum address a _min and a maximum address a _max of a terminal connected to the one network are set in a source address part of the test frame. Then, the address is sequentially updated from the minimum address a _min to the maximum address a _max , the test frame is sequentially transmitted to the arbitrary destination address, and the test frame is transmitted to connect to the one network. All addresses of the transmitting source terminals are registered in the repeater.

[0008] The second invention of the present application is directed to a LAN line in which one network connecting a large number of terminals is connected to another network via a repeater, and a network from the one network to all the networks in the LAN line. In a LAN system comprising a LAN analyzer for transmitting a test frame to the network, the LAN analyzer transmits a test frame formed by the test frame forming unit to the entire network, the test being performed by the LAN analyzer. And a frame transmitting means for setting an arbitrary source address in a source address part of the test frame, and for a destination address part of the test frame, a minimum address b _min for all terminals connected to the network. Maximum address b _max
Is set, the address is sequentially updated from the minimum address b _min to the maximum address b _max , and the test frame is sequentially transmitted to all the addresses from the minimum address b _min to the maximum address b _max. It is characterized in that the destination terminal receiving the frame can monitor the test frame to check for a line abnormality.

Furthermore, the third invention of the present application is directed to a LAN line in which one network connecting a number of terminals is connected to another network via a repeater, and an arbitrary network in the LAN line from the one network. LA comprising a LAN analyzer capable of transmitting test frames to a network
N system, the LAN analyzer comprises a test frame forming means for forming a test frame, and a test frame transmitting means for transmitting the test frame formed by the test frame forming means to the arbitrary network. For the source address, set a minimum address a _min and a maximum address a _{max of} a terminal connected to the one network,
A minimum address b _min and a maximum address b _max of terminals connected to all networks are set for a destination address of the test frame, a destination address of the test frame is set, and a minimum address a _{min for} a source address is set. And the test frame is sequentially updated to the maximum address a _max , and the source address of the test frame is set, and the destination address is set from the minimum address b _min to the maximum address b.
_The test frame is sequentially updated to _max, and the test frame is sequentially transmitted. By transmitting the test frame, the source address connected to the one network is registered in the repeater, and the incoming call receiving the test frame is received. It is characterized in that the test frame can be monitored at the previous terminal to check for a line abnormality.

[0010]

According to the first aspect of the present invention, when a LAN analyzer is connected to an arbitrary address to which a terminal is connected and activated, an address of the terminal connected to the network is added to a source address portion of the test frame. Are sequentially updated and written, and the test frames are sequentially transmitted on the network. On the LAN line, this is equivalent to transmitting frames from all addresses of the network to which the LAN analyzer is connected, and therefore, the network Are registered in the repeater.

According to the second aspect of the present invention, the addresses of the terminals connected to each network are sequentially updated and written in the destination address portion of the test frame, and the test frames are sequentially transmitted on the network. Therefore, on the LAN line, this is equivalent to outputting a frame from the network connected to the LAN analyzer to all addresses of the LAN line.

Further, according to the third invention of the present application, it has both functions of the first and second inventions, and is equivalent to transmitting frames from all addresses of the network to which the LAN analyzer is connected. All the addresses of the network are registered in the repeater, and the frame is transmitted to all the addresses of the LAN line.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments shown in the drawings. FIG. 1 is a flow sheet showing a LAN analyzer according to the present invention, and FIGS. 2 to 4 are flowcharts showing the processing procedure. 5 and 6 are denoted by the same reference numerals, and detailed description will be omitted.

In the figure, reference numeral 3 denotes a LAN analyzer connected to the transceiver 2 at an arbitrary address a in the networks N _{1 to} N ₆ , which is a test in which the destination address setting unit 4 and the source address setting unit 5 are connected. Frame forming means 6
And a test frame transmitting unit 7 for transmitting the test frame formed by the test frame forming unit 6.

The test frame forming means 6 writes the addresses specified by the setting sections 6 and 7 into the destination address section and the source address section of the test frame. The test frame includes a plurality of networks N
_{When 1 to} N ₆ are connected via a repeater 1 such as a bridge or a router, they can be transmitted to different networks through the repeater 1 so that they can be transmitted to different networks.
Layer 3 protocols are supported.

FIGS. 2 to 4 are flowcharts showing the processing procedure of the LAN analyzer 3. In the case of this example, the address a of the terminal Ea is connected, for example, the network N ₁ a = 1,000-1,999, the network N ₂ a =
2000-2999, the network N ₃ a = 3,000 to 3,999, in the network N ₄ a = 3000~3999, network N ₅
In a = 5,000 to 5,999, the network N ₆ a = 6000 to
6999 is set to the address of the network N ₁ a
A case in which the LAN analyzer 3 is connected to = 1100 and used will be described.

FIG. 2 shows a case in which the destination address is fixed and only the source address is updated. When the process is started, an arbitrary destination address is set in step (1). The destination address may be the address of the network N ₁ to N ₆ throat. Then, in step (2), the LAN
Set the minimum address a _min = 1000 and the maximum address a _max = 1999 of the network N ₁ to which the analyzer 3 is connected,
In step (3), a = a _min, and in step (4), the address a is written to the source address SA of the test frame, and in step (5), the test frame is transmitted.

In step (6), it is determined whether or not test frames have been transmitted for all addresses, for example, a = a
Judgment is made based on whether it is _max . If a = a _max is not satisfied, the process _proceeds to step (7) to replace a = a + 1, and then returns to step (4). If a = a _max , the process is terminated. Note that in this case, steps (1) to
The processing of (4), (6) and (7) is the test frame forming means, and the processing of step (5) is the test frame transmitting means.

As described above, since the test frame having all the addresses a = 1000 to 1999 of the network N _{1 as} the source addresses is automatically transmitted, all the addresses of the network N ₁ are transmitted to the port P of the repeater 1. ₁ (see FIG. 5).

Next, FIG. 3 shows a case in which the source address is fixed and only the destination address is updated. When the process is started, an arbitrary source address is set in step (11). The source address can be any address if the address of the network N ₁ connected to LAN analyzer 3 are actually connected address a
= Not name those limited to 1100.

Next, in step (12), the minimum address b _min = 1000 and the maximum address b _max = 6999 of all the networks N _{1 to} N ₆ are set.
In step 3), b = b _min , the address b is written in the destination address part DA of the test frame in step (14), and the test frame is transmitted in step (15).

In step (16), it is determined whether or not test frames have been output for all the addresses, for example, b
= B _max is determined. And b = b
If not _max , go to step (17) and b =
After replacing with b + 1, return to the step (14),
If b = b _max , the process ends. In this case, steps (11) to (14), (16), (17)
Is the test frame forming means, and the processing of step (15) is the test frame transmitting means.

As described above, since the test frames having the destination addresses of all the addresses b = 1000 to 6999 of the respective networks N _{1 to} N ₆ of the LAN line are automatically transmitted, the test frames are transmitted to all the addresses. And any terminal E from which the test frame is received.
By monitoring the test frame in a, it is possible to inspect a line abnormality or the like.

FIG. 4 shows a case where both the destination address and the source address are updated. When the process is started, the minimum address a _min of the network N ₁ to which the LAN analyzer 3 is connected in step (21). = 1000, maximum address a _max = 1999, a = a _min in step (22), address a is written in the source address SA of the test frame in step (23), and the process proceeds to step (24). .

In step (24), all the networks N ₁ to N ₁
N ₆ minimum address b _min = 1000, maximum address b _max
= 6999, b = b _min in step (25), the address b is written in the destination address part DA of the test frame in step (26), and the test frame is transmitted in step (27). Next, in step (28), it is determined whether or not test frames have been output from one transmission source to all addresses, based on, for example, whether or not b = b _max . If b = b _max is not satisfied, the process _proceeds to step (29), where b = b + 1, and then returns to step (26). If b = b _max , the process _proceeds to step (30).

In step (31), the network N ₁
It is determined whether or not the test frame has been transmitted from all the addresses of, for example, based on whether or not a = a _max . If a = a _max is not satisfied, the process _proceeds to step (32), where a is replaced with a = a + 1. Then, the process returns to step (23),
If a = a _max , the process ends. In this case, the processing of steps (21) to (26), (28) to (32) is the test frame forming means, and the processing of step (27) is the test frame transmitting means.

As described above, in this example, the network N ₁
Since test frame whose source address is the all address a = from 1,000 to 1999 of is output automatically, by storing all the addresses of the network N ₁ to the port P ₁ of the repeater 1 (see FIG. 5) And all addresses a = 1000 to 6999 of each network N _{1 to} N ₆ of the LAN line.
Is automatically transmitted, the test frame can be transmitted to all addresses. By monitoring the test frame at any terminal Ea to which the test frame has been received, , Line abnormalities and the like can be inspected.

[0028]

As described above, according to the first invention of the present application, a test frame having all addresses of a network to which a LAN analyzer is connected is transmitted as a source address on a LAN line, and the network is transmitted to the network. Can be registered in the repeater. According to the second aspect of the present invention, the LAN
Since test frames are transmitted from the network to which the analyzer is connected to all addresses of the LAN line, monitoring the test frames at the terminal of the destination makes it possible to check for line abnormalities. Further, according to the third aspect of the present invention, the third aspect of the present invention has both the functions and effects of the first and second aspects, and all addresses of the network can be registered in the repeater, and at the same time, the LAN line Has an excellent effect that a frame can be transmitted to all the addresses of.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a LAN analyzer according to the present invention.

FIG. 2 is a flowchart showing the processing procedure.

FIG. 3 is a flowchart showing another processing procedure.

FIG. 4 is a flowchart showing still another processing procedure.

FIG. 5 is a network diagram of a LAN line.

FIG. 6 is an explanatory diagram showing a frame format.

[Explanation of symbols]

N _{1 to} N ₆ Network 1 ... Repeater 3 LAN analyzer 4 Destination address setting unit 5 Source address setting unit 6 Test frame Forming means 7 ··· Test frame transmitting means

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akira Fuse 1-2-9, Yawata-cho, Higashi-Kurume-shi, Tokyo Inside Optec Didy Mel Co Laboratory (72) Inventor Kazushi Togasaki Higashi-Kurume, Tokyo 1-2-9, Hachiman-cho, Ichi-cho Optec Didi Mel Melco Laboratory Co., Ltd. (72) Inventor Yoshimasa Futagawa 1-2-9, Yawata-cho, Higashikurume-shi, Tokyo Optics Didi Mel Mel Laboratory, Inc. (72) Inventor Munekazu Hirata 1-2-9, Yawata-cho, Higashi-Kurume-shi, Tokyo Inside Optec Didi Melco Laboratory Co., Ltd. (72) Inventor Yoshiaki Matsuda, Yachiman-cho, Higashi-Kurume-shi, Tokyo Ryoichi Ishii, Osaka, Osaka Prefecture, Japan Examiner at Motex Co., Ltd., 3-8-15 Nishinakajima, Yodogawa-ku Yuichi Mano (56) References JP-A-63-240231 (JP, A) JP-A-4-156133 (JP, A) JP-A 61-61 41252 (JP, A) JP-A-4-167724 (JP, A) JP-A-3-94854 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04L 12/28 H04L 12 / 46 H04L 12/56 H04L 29/14

Claims (6)

(57) [Claims] 1. A LAN in which one network connecting a number of terminals is connected to another network via a repeater.
L and a test frame transmitted from the one network to any one of the LAN circuits.
In a LAN system including an AN analyzer, the LAN analyzer includes a test frame forming unit that forms a test frame, and a test frame transmitting unit that transmits the test frame formed by the test frame forming unit to any one of the networks. An arbitrary destination address is set in a destination address part of the test frame, and a minimum address a _min and a maximum address a of a terminal connected to the one network with respect to a source address part of the test frame. By setting _max , the minimum address a _min to the maximum address a
_The address is sequentially updated up to _max, and the test frame is sequentially transmitted to the arbitrary destination address. By transmitting the test frame, all the addresses of the transmission source terminals connected to the one network are relayed. LAN system characterized by registering in a device. 2. A LAN analyzer for use in the LAN system according to claim 1. 3. A LAN in which one network connecting a number of terminals is connected to another network via a repeater.
A LAN system for transmitting a test frame from the one network to all the networks in the LAN line.
An analyzer comprising: a test frame forming unit for forming a test frame; and a test frame transmitting unit for transmitting the test frame formed by the test frame forming unit to the entire network. A source address is set, and a minimum address b for all terminals connected to all the networks for a destination address part of the test frame.
_min and the maximum address b _max are set, the addresses are sequentially updated from the minimum address b _min to the maximum address b _max , and the test frame is updated for all addresses from the minimum address b _min to the maximum address b _max . A LAN for transmitting the test frame sequentially and monitoring the test frame at a destination terminal receiving the test frame to check for a line abnormality;
system. 4. A LAN analyzer for use in the LAN system according to claim 3. 5. A LAN in which one network connecting a number of terminals is connected to another network via a repeater.
Line and an LA for transmitting a test frame from the one network to any network in the LAN line
In a LAN system including an N analyzer, the LAN analyzer includes a test frame forming unit that forms a test frame, and a test frame transmitting unit that transmits a test frame formed by the test frame forming unit to the arbitrary network. Setting a minimum address a _min and a maximum address a _{max of} a terminal connected to the one network with respect to a source address of the test frame, and setting a destination address of the test frame to all networks; A minimum address b _min and a maximum address b _max of the terminal being set are set, a destination address of the test frame is set, and a test frame is transmitted by sequentially updating the source address to the minimum address a _min and the maximum address a _max. And Set the source address of the test frame, the minimum address b for the destination address
_The test frame is sequentially transmitted by updating from _min to the maximum address b _max, and the source address connected to the one network is registered in the repeater by transmitting the test frame. A LAN system wherein a destination terminal receiving the transmission can monitor the test frame to check for a line abnormality. 6. A LAN analyzer used for the LAN system according to claim 5.