JPS62178037A - Network management system - Google Patents

Abstract

PURPOSE:To obtain a concentrative network management equipment while enhancing the independency between segments by adopting the address system of a network as two stages of segment and node addresses. CONSTITUTION:A packet is generated in a node 21. An address of the node 21, a node address and a segment address are set to the packet. The packet is sent to a ring node 51 through a bus 45. The node 21 sends the packet to a ring 55. The packet sent to the ring is compared with its own address by a ring node 54, and in case they are coincident, the packet is sent to a bus 48. The network management equipment 30 collects the packet sent to the bus 48 and the collected data is stored in a storage circuit 305. Then a main controller 301 applies proper processing to the data and, for example, the sent packet number by nodes and a reception packet number are displayed on a CRT.

Description

Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to a local area network (hereinafter referred to as LAN).
It is concerned with the network management system of
The present invention relates to a bus type LΔN network management system consisting of a plurality of segments using the 3MA/CD method.

(Technical background of the invention) C3HA/CD (Carrier 5ense Mu
ltiple Access with Co11isi
The on Detection method is one of the standard transmission medium access methods for LAN, and basically belongs to broadcasting. That is, a message from one node is transmitted to all nodes on the coaxial cable of the same segment, and other nodes determine whether the message is addressed to them or not based on the destination address. Therefore, a LAN network management device consisting of a single coaxial cable or multiple coaxial cables connected in the same segment, in a row, or a repeater can relatively easily collect the traffic of transmitted or received data from each node. be able to. The prior art will be described below with reference to FIGS. 4 and 5 of the accompanying drawings.

FIG. 4 is a block diagram showing the configuration of a conventional network management system. Each node (A.

B,...,Z) 11 to 13 and a network management device (NME) 14 are connected to a coaxial cable 19 via transceivers 15 to 18. NME 14 receives the packets on coaxial cable 19 and sends each bucket 1
Depending on the sending address and receiving address of ~, the node (A
, B, ..., Z) Collect data every 11 to 13.

However, L
AN has limitations on both network distance and node failure, making it unsuitable for large-scale LANs. Therefore, in a large-scale LAN, a coaxial cable is generally used as a branch LAN, and an optical fiber cable that interconnects a plurality of branch LANs is used as a trunk LAN, and a network is constructed by a combination of these. Figure 5 shows such a large-scale LA
FIG. 2 is a block diagram showing an example of the configuration of N.

In the figure, the branch line LAN is a bus type AN, and each node (1A, 1B, IZ, 2A, 2B, 2Z.

nA, nB, nZ) 21 to 29 and a network management device (NME) 30 are connected to coaxial cables 45 to 48 via transceivers 31 to 44.

Further, each branch LAN is connected to an optical fiber 55 forming a trunk 1!1 iLAN at each node (R1, R2°Rn and RO>51 to 54) to form a ring-type large-scale LANff1.

[Problems with background technology]

Incidentally, in a large-scale LAN, it is desirable from the viewpoint of effective use of the network that each branch LAN be able to operate as a plurality of mutually independent segments. In other words, message transfer between one bare node is limited to one branch LAN to which each node belongs, without disrupting all other branch LANs.
It is desirable to be able to forward messages. Specifically, in FIG. 5, if nodes 1A21 and 1822 are currently performing message transfer, the line busy due to this is limited to segment 45, and other segments 46
．． In No. 47, it is desirable to be able to transfer messages between other nodes simultaneously and independently. Also, if nodes 1A21 and 2A24 are forwarding messages, the impact will be on segment 1-45.46.
, and does not extend to segment 47.

Such a network management system for a large-scale LAN is different from a conventional network management system for a LAN configured with the same segment, and various techniques have been proposed in the past.

The first and simplest method is to create an address system that allows messages from one node to be sent to all swords.

However, with this method, there is a great possibility that collisions will occur frequently on the coaxial cable, and the throughput of the entire network will decrease, so it cannot be said to be a very good method.

A second method is to accumulate transmitted and received packets for each node. For example, a method is to equip a floppy disk and periodically send the data to one network management device. However, unless the floppy disk has a considerably large capacity, the data collection cycle cannot be increased, and the configuration of each node becomes large-scale.

A third method is to install a network management device for each segment. However, this increases system complexity and costs for the network as a whole, and decentralized management of the network is not desirable in terms of system use. In any case, Okawa 8! It is possible to realize a simple network management system that can use LAN efficiently.

It wasn't.

(Object of the Invention) The present invention has been made to solve the above-mentioned unresolved problems of the prior art, and provides a simple and accurate data traffic collection function for each node in a large-scale LAN consisting of multiple segments. The purpose is to provide a network management system with Still another object of the present invention is to provide a network management system that does not affect other segments not involved in message transfer. Yet another object of the present invention is to provide a centralized network management system.

(Summary of the invention) Features of the present invention are Information Center]! Branch line LA that connects between l neck attachments
Connect N and multiple branch LANs to each other? ? Fil
In a network management system that runs over a LAN, an information processing device that is a source is given a node address that indicates a device on a branch LAN of another information processing device that is a destination, and a trunk of the branch LAN that has the destination information processing device. 1FilLA
The N device has a function of adding a J segment address to the transmitted information, reads the segment address added to the transmitted information at the connection point between the branch LAN and the main LAN, and transmits the segment address based on the reading result. Transfer information to the branch LAN
The present invention is characterized in that a control node is provided to control whether or not data is to be imported into the network, thereby making it possible to easily, accurately, and efficiently collect data for each node.

〔Example〕

Embodiments of the present invention will now be described in detail with reference to FIGS. 1 to 3 of the accompanying drawings. In the following description of the drawings, the same elements are given the same reference numerals to avoid duplication of description.

Figure 1 shows a large-scale LA, an example of which is shown in Figure 5.
FIG. 3 is a format diagram showing a data link level frame format applied to N. As shown in FIG.
R). The header further includes a destination address field (DA), a destination address field (SA)
and its Count Lengfield et al. (XX).

The l-sage consists of a CRC field, etc. In addition, IE
In EE802.3, the field length is D
It is defined as A6 bytes, SA6 bytes, XX2 bytes, and CR04 bytes.

Figure 1(b) shows the destination address field (1) A
) is an explanatory diagram showing an example of the configuration. The address field consists of a segment address (SEGΔ) and a node address <N0A); in FIG. 5, 5EGA is the address given to each segment 45 to 48;
A is an address given to each node 21 to 30.

5EGA and NDA are roughly divided into two parts SS and 5sss, and NN and nnnn, as shown in FIG. 1(b). 88. NN is a network management device (NM
E) is connected to the segment address (in Figure 5, symbol 48) and the node address of the NME itself (in Figure 5, symbol @
30).

5sss and nnnn are general information processing equipment (DTE)
is connected to the segment address (in Figure 5, reference numeral 45
47) and the node address of the DTE itself (in Figure 5,
21 to 2).

Now, in FIG. 5, from node 1A21 to node 2A
An embodiment of the present invention will be described below, taking as an example a platform for transmitting messages to 24.

FIG. 2 is a block diagram showing the basic configuration of the main parts of FIG. 5 as an embodiment of the present invention.

In the figure, the same reference numerals as those in Fig. 5 refer to J3.
Indicate the same elements and avoid duplication of their explanations.

Other blocks are as follows.

The ring node (R1) 51 is connected to the main side fl+1 circuit (MC
P) 511, bus control circuit (BCP) 512, optical to electrical conversion circuit (0/E) 513, electrical to optical conversion circuit (Elo
) 514, address field extraction circuit (ΔDR) 51
5. Address comparison circuit (CPR) 516, data signal mixing circuit (MI'X) 517 and gate circuit 518°5
Consists of 19. The ring node (RO) 54 also has the same configuration as R1. The bus node (1A>21 shows only the data transmitter in the figure, but the main control circuit (MC
P) 211, bus control circuit (BCP) 212, network management node address generation circuit (nme) 213
, destination node address generation circuit (da) 214, mn
e and da synthesis circuit (OA) 215, self-node address generation direction ff1 (SA) 216, message generation circuit (D
It consists of a frame generation circuit (FLM) 218 that synthesizes ATA>217 and OA, SA, and DATA. Network management equipment (NME) 304, main side port 11 circuit (MCP) 301, CRT console 302, bus control circuit (13cP) 303, data collection circuit (LOG)
304J3 and its memory circuit (DK) 305. The operation of the above embodiment will be explained below.

At node (1A) 21, MCP211, nme21
3, da214, DA215.5A216, DATA2
17 and FLM 218, buckets 1 to 1 with frame formats as shown in FIG. 1 are generated. The address of node 1A is set in the SA field of the packet.

The DA field is filled with internal M by circuits 213 to 215.
The segment address SS of E, the node address NN, and the bigen 1-address 5sss1 node address nnnn of the node 2A are set. That is, a feature of the present invention is that each node always adds the address of the network management node in addition to the destination node to which it wants to send.

Now, the aforementioned packet is transmitted by BCP 212 and transceiver 32 to CSMA/CD
III 1111. : If the bus 45 is free, it is sent on the bus 45 and the ring node (R1) 51
sent to. The ring communication method may be a token control method or a time division multiplex control method. MCP51
1. The MIX 517 and the circuit 519 detect a free token in the case of the token control method, detect a free channel in the case of the time division multiplex control method, and connect the ring 5
5, the above-mentioned packet is sent out.

Buckets 1~ sent out on the ring are sent to ring nodes (R
2) from 52 and ring node (RO) 54 to their respective buses 46.48 with the same algorithm. For example, in the ring node (RO) 54, the ADR 54
5 (the function is the same as 515, and the same applies hereinafter) extracts the segment address field (33) from the packet described above, and compares it with its own segment address using CPR546. If the comparison results in a match, the packet is sent onto the bus 48 via the circuit 548, BCP 542, and transceiver 43. If they do not match, they are sent as is to the downstream ring node.

However, since the ring node (RO) 54 is a ringmate of the management branch LAN to which the NME 30 is connected, all J packets are sent onto the bus 48.

The NME 30 sends the packets sent onto the bus 48,
Through transceiver 44 and BCP303, LOG304
The data is collected and recorded on the DK305. Then, the collected data is processed appropriately by the MCP 301, and for example, sending bucket 1 - losing/receiving bucket 1 for each node is performed.
-Display the number on the CRT 302.

FIG. 3 is a block diagram of main parts showing the configuration of an embodiment of the present invention. The difference from the first embodiment shown in FIG. 2 is that by giving multiple addresses to the network management device (NME>30), concentration on the network management device is eased. FIG. 3 shows a network management device 30 and coaxial cables 481 to 484.
Although only the first embodiment is shown, its operation is basically the same as that of the first embodiment shown in FIG. The coaxial cable bus type LANs 481 to 484 are connected to bus control circuits BCP 3031 to 3034 of the NME 30 via transceivers 441 to 444. MCP30
1. CRT console 302, LOG 304, and DK
305 is the same as shown in FIG. In this embodiment, although the network management task is complicated, it is possible to collect data traffic of a plurality of nodes at the same time, and the throughput of the entire network can be improved.

Although several embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible. Further, according to IEEE802.3, the total bit length of the address field is fixed, but the internal structure is not defined. According to the present invention, the number of bits to be allocated to the network management node address may be several bits or less, and there is no need to limit the number of nodes. In a multi-tenant building, the network owner needs to provide billing information based on the amount of network usage for each tenant, and this invention also applies to such billing information. Accordingly, it is possible to easily and accurately calculate 1!.

〔Effect of the invention〕

As described in detail above, according to the present invention, the network address system has a two-stage structure of segment addresses and node addresses, so segment 1 is suitable for large-scale LANs.
It is possible to obtain a centralized network management device while taking advantage of the independence between .

[Brief explanation of drawings]

FIG. 1 (a> is a format 1 showing an example of bucket 1 format at the data link level to which the present invention is applied)
1(b) is an explanatory diagram showing an example of the structure of the destination address field according to the present invention, and FIG.
3 is a block diagram showing another embodiment of the present invention, FIG. 4 is a block diagram not showing the prior art, and FIG. 5 is a block diagram showing a large-scale LAN which is the background of the present invention. FIG. 2 is a block diagram showing the configuration. 21... Node device on the bus, 30... Network management device, 31, 32, 43. 44... Transceiver, /15. /18...Bus type LAN, 51.54.
...Node device on the ring, 55...Ring type LAN
. Applicant's agent Sato - Okori Manami 3 figures, 4 figures

Claims (1)

[Claims] 1. In a network management system that includes a branch LAN that connects information processing devices and a trunk LAN that interconnects a plurality of branch LANs, an information processing device that is a source is provided with a destination and a destination. A function is provided to add to transmission information a node address indicating a device on a branch line LAN of another information processing device and a segment address indicating a device on the main line LAN of the branch line LAN having the destination information processing device, and A control node is provided at a connection point between the LAN and the trunk LAN to read the segment address added to the transmission information and control whether or not to import the transmission information to the branch LAN based on the reading result. A network management system characterized by: 2. A patent claim characterized in that a control node on a branch LAN performs control to import the transmission information into the branch LAN only when a segment address read from the transmission information indicates the branch LAN. The network management system according to item 1. 3. One branch line LAN forms a management branch line LAN to which a network management device is connected, and this management branch line LAN
3. The network management system according to claim 1, wherein the control node takes in all transmission information to the management branch LAN regardless of the segment address.