JPH03123137A - Manual registration system in routing table of mac bridge - Google Patents

Abstract

PURPOSE:To improve the throughput as the whole network by bringing a media access control(MAC) address whose communication frequency is high to manually register in a nonvolatile memory in advance. CONSTITUTION:In an MAC bridge device 2, a nonvolatile memory 21 is provided, and in a local area network(LAN) 1 connected to a communication port 23, an MAC address of a device whose communication frequency or communication quantity is especially high, for instance, a minicomputer, a graphic terminal, etc., is brought to manually register in the nonvolatile memory 21 in advance by a keyboard, etc. In such a state, simultaneously with initialization of a routing table 22a executed whenever an LAN system starts, the contents brought to manually register in the nonvolatile memory 21 are loaded to original routing table 22a. In such a way, it becomes unnecessary to execute a multi-address communication for learning and generating the routing table, and the throughput as the whole network system is improved.

Description

Detailed Description of the Invention [Summary] A local area network (LAN) equipped with the same or different MAC sublayer protocols can be connected to a logic link control (LLC) network using the MAC sublayer protocols.
) Media access control (to M) that relays protocol data higher than the sublayer protocol in a 1-transparent manner. MAC address, communication port 1.
Regarding the method of registering s), to (1) suppress the increase in traffic on the network required to learn and generate the routing table when the C bridge device is initialized, such as when the power is turned on. With the aim of increasing the throughput of
Media access control (MAC) addresses with high communication frequency are manually registered in the non-volatile memory, and the manually registered media access control (MAC) addresses are transferred to the routing chip when the MAC bridge device is initialized. - At the time of registration, a flag ■ is added to the manually registered Media Access Control (MAC) address that prohibits it from being deleted from the routing table regardless of the amount of time there is no communication. , Media Access Control (MAC) registered in the manual
When registering an address in the routing table, the address is configured to be registered at a position where the search order during operation is "1st".

[Industrial application field]

The present invention enables a local error network (LAN) with the same or different MAC sublayer protocols to be connected to a local error network (LAN) using the MAC sublayer protocol to provide protocol data higher than the logic link control (1, LC) sublayer protocol. The MAC address,
Concerning a method for registering a communication boat.

Traditionally, relatively small-scale local area networks (LANs) have been built in each company for each business location, location, etc., but in order to cope with business expansion, In order to improve
:Local area network for each location (hereinafter referred to as LAN)
), and one means to meet this demand is to use media access control (MAC) bridges, which can transparently connect LANs with different protocols. Equipment is becoming necessary.

As the scale of the connection between LANs by the MAC bridge device increases (as the number of specific important connection routes increases, for example, if the power of the bridge device is cut off and the power is turned off again) When a key address is input, for example, broadcast communication to secure the important address on the routing table may affect communication between other LANs, so the LAN system must be restarted. What is needed is an effective method for registering the most important addresses for routing groups without reducing the throughput of the 1.8N system even during downtime.

(Prior art and problems to be solved by the invention) FIG. 2 is a diagram explaining a manual registration method in the routing table of a conventional MAC bridge, and (a)
An example of the configuration of the N system is shown in (b). An example of the configuration of protocol data between ANs is shown, and (c) shows an example of the configuration of a routing triple provided within the MAC bridge.

For example, LAN1 for each factory or office in each company is
Connected via port (LS) 23 of MAC bridge device W2, each LAN! Data transfer requests from
The controller (MCP) 20 of the C bridge device 2 converts the protocol data 10 of the frame transmitted via the communication port (LS) 23 into the C sublayer protocol 10.
The MAC address (OA) of the transmission destination is read from a, and the main storage device (MS) 22 in the MAC bridge device 2
Based on the routing table 22a provided therein, the communication boat (LS) 23 to which the other device or terminal is connected is recognized, and the communication boat 1-(LS
) Data is transmitted from 23 to LAN 1 to which the other party's terminal is connected.

For example, as shown in Figure (b), the protocols between each 178N1 are as follows: Starting from the lowest physical layer, the MAC sublayer protocol (source address (SA), destination address (SA),
DA))■, Logic Link Con1 to LOL (LL
C) Sublayer protocol, consisting of ~.

MAC bridge refers to the above-mentioned MAC bridges of the same type or different types.
This is a mechanism for transparently relaying protocol data of an upper LLC sublayer protocol 10b or higher through the LAN I having a sublayer protocol 10a using the MAC sublayer protocol 10a.

In order to realize the above mechanism, the MAC bridge device 2 reads the transmission destination MAC address (DA) of the MAC sublayer protocol loa from the frame transmitted from the LAN 1, and reads the transmission destination MAC address (DA) from the frame transmitted from the LAN 1. D
Based on A), communication $ to send the received frame to LAN 1 to which the device with the corresponding address is connected.
-) (LS) A mechanism for determining 23 is required.

Conventionally, as a method for determining this communication port 1-(LS) 23, a routing table 22a (!), which associates MAC addresses and communication ports (LS) 23, is set in advance. , a method is used in which the flow of the frame is controlled by referring to the routing chill pull 22a.

However, in this system, the routing table 22a had to be changed each time a terminal was added, as well as when the network was changed.

Therefore, instead of having a fixed table in advance, by using a frame that passes through the gate^C bridge device 2,
By dynamically generating and updating the routing table 22a, the above drawbacks can be compensated for. This is the so-called routing table 24+a with a learning function.

However, this Routine Butipuru 2+ with learning function
In case a, once the power of the MAC bridge device 2 is turned off, all of the above learning results are lost, so learning had to be restarted from zero after the power is turned on.

For this reason, immediately after the system is started after the power is turned on, the correspondence information between the transmission destination MAC address (DA) and the transmission host is not registered at all. The above-mentioned routing table 22a was generated by transmitting information and learning from the response information.

Therefore, the traffic within each LAN 1 increases, which is a factor that reduces the throughput of the LAN system as a whole.

In view of the above-mentioned conventional drawbacks, the present invention provides for
Media Access Control (?IAC), which transparently relays protocol data higher than the Logic Link Control (1,Lc) sublayer protocol, connects a local area network (LAN) with an AC sublayer protocol to a Fuji MAC sublayer protocol. ) MAC address for the routing table provided in the bridge device.

This reduces the throughput of the network by suppressing the increase in traffic on the network that is required when learning and generating the routing table during initialization such as when the MAC bridge device is powered on to register a communication port. The purpose is to provide a registration method that can improve the

[Means to solve the problem]

The above problem is solved by a manual registration method in the routing table of the MAC bridge configured as follows.

A local area network (LAN) with the same or different MAC sublayer protocols can be connected to a logic link control (LL) network using the MAC sublayer protocol.
C) In a media access control (MAC) bridge device that transparently relays protocol data higher than the sublayer protocol, a non-volatile memory is provided in the MAC bridge device, and a high-frequency communication Register the Media Access Control (○ to M) address in the manual 10, and register the "Media Access Control (○ to M)" address registered in the manual in the routing table when initializing the MAC bridge device. , At the time of registration, the manually registered media access control (MAC) address is added with a flag ■ that prohibits it from being deleted from the routing table regardless of the non-communication time; When registering a media access control (MAC) address in the routing table, the configuration is such that it is registered at a high position in the search order during operation.

[Effect]

That is, according to the present invention, local area network (LA
N) is used in a media access control (MAC) bridge device that transparently relays protocol data higher than the logic link control (1, LC) sublayer protocol using the MAC sublayer protocol, especially for terminals with a lot of communication. Regarding the transmission destination port ^C address, the transmission destination MAC address and the communication port 1.
s) in the manual, and
At the same time as the routing table is initialized every time the N system is started up, the contents manually registered in the non-volatile memory are loaded into the original routing table, so that the To eliminate the need for repeat communication for learning and generating a routing table.

Since the size of the routing table is finite, the information in the routing table is usually generated by learning and adding one additional value as described above.

Although this has been changed, for example, if it is detected by comparison with the timer value (■) that no communication has been performed for a certain period of time, it is deleted.

However, regarding the table information that has been manually registered in advance in the non-volatile memory, since it is an address with a large amount of communication, a flag (■) is set to prevent it from being deleted regardless of the amount of time there is no communication. - Add the manual registration information from the non-volatile memory when loading it into the rich routing table.

Also, during the loading, it is registered at a higher search position in the routing table so that the search during operation can be performed quickly.

With this configuration, even if the C-ring device goes down at the gate for some reason, the
Originally, a specific transmission destination HAC address with a large amount of communication is registered immediately when the system is started up. Furthermore, since the specific information is not deleted regardless of the non-communication time, the broadcast communication required to learn the routing table can be made unnecessary. Furthermore, for table information that requires a large amount of communication, the search time during operation is shortened, communication time can be shortened, and the throughput of the network as a whole can be improved.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention, in which (a) shows an example of the configuration of a MAC bridge device, and (b) shows an example of the configuration of a routing table. A non-volatile memory 21 is provided, in which routing table information with a large amount of communication is manually registered, and when the system is started up, a means is provided for registering the information from the non-volatile memory 21 into the routing table 22a, and means for setting a deletion prohibition flag ■ on the routing table 22a when registering;
Further, when loading the routing table 22a from the non-volatile memory 21, a means for registering it at a position higher in the search order during operation is a means necessary for carrying out the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

3 4 The manual registration method in the routing table of the MAC bridge of the present invention will be explained with reference to FIG.

Even if the present invention is implemented, the MAC
Since the basic operation of communication via the bridge device 2 does not change in particular, it will be omitted, and here, the explanation will focus on the operation of registering manual registration information in the routing table 22a in the MAC bridge device 2. .

In the present invention, as shown in FIG.
It is connected to the communication boat (LS) 23 of the AC bridge device W2.
For example, minicomputers that use a large amount of communication.

MAC address (this M
According to the American Institute of Electrical Engineers (IEI!E) regulations, the AC address is expressed in, for example, 6 bytes and is an address unique to each device.) The AC address is stored in non-volatile memory in advance using a keyboard (KB), etc. not shown. Register the manual.

Therefore, when the LAN system is started up, the correspondence information between the transmission destination MAC address and the communication port, which should be registered in the routing table 22a, is already registered in the routing table 22a.
From the non-volatile memory 21 to the routing table 22a
Since the frame is loaded into the frame, it is possible to transmit and receive frames without performing broadcast communication for learning as in the conventional system, and it is possible to prevent an unnecessary increase in traffic.

Also, even if the MAC bridge device 2 goes down for some reason, communication between devices with specific MAC addresses will be handled at the time of system startup.
The nonvolatile memory 21 is stored in the routing table 22a.
Therefore, it will be registered immediately.

Furthermore, as shown in this figure, the routing table 22
A is set with a deletion prohibition flag ■, and the non-volatile memory 2
By setting the flag ``on'' for the information registered from 1, general table information (with the deletion prohibition flag ``off'') can be set at the time of initial registration.
Alternatively, during communication, a certain value is substituted, and all timer values are periodically subtracted by 1, and tables that reach 0 are sequentially deleted, whereas "1 deletion prohibition flag" Table information for which ■ is set to °on ° will not be deleted regardless of the non-communication time, so broadcast communication for learning purposes cannot be prevented for communication to the MAC address registered in the manual. , it is possible to suppress an increase in traffic on the network due to this learning.

In addition, these manuals are registered with frequently communicated information.
Therefore, by registering table information that is frequently searched at a position where the search time is shorter than other table information, communication time can be shortened and the throughput of the entire network can be improved.

Thus, the present invention provides a method for using local area networks (LA) with homogeneous or dissimilar MAC sublayer protocols.
N) is specified by the MAC sublayer protocol to a routing table provided in a media access control (MAC) bridge device that transparently relays protocol data higher than the logic link control (LLC) sublayer protocol. When registering addresses and communication ports, the communication frequency or correspondence information between a MAC address with a large amount of communication and one communication port should be manually registered in advance in non-volatile memory, and the network (LAN) system should be started up. At the time of initialization, such as when uploading, it is registered in the routing table, and at the time of registration, the deletion prohibition flag is registered as "°ON", and the registration position is registered at a position where the search time is shortened. The feature is that the throughput of the network system as a whole is improved by eliminating the need for repeat communication for learning.

〔Effect of the invention〕

As described above in detail, the manual registration method in the routing table of the MAC bridge of the present invention is applicable to low-power network applications (LAN) with the same or different MAC sublayer protocols.
) The MAcAc sublayer protocol is used to relay protocol data from the Link Control (1, Lc) sublayer protocol to the media access controller 1. A non-volatile memory is provided in the MAC bridge device to register correspondence information of MAC address and communication baud 1 in the routing table, and media access control with high communication frequency is stored in the non-volatile memory. (MAC) address and communication boat correspondence information are manually registered, and the media access control (MAC) address registered in the manual is registered.
When registering the MAC address in the routing table at the time of initializing the MAC bridge device, the media access controller 1 to role (MA
C) When registering the manually registered Media Access Control (MAC) address in the routing table, add a flag ■ to the address that prohibits it from being deleted from the routing table regardless of the non-communication time. The MAC bridge device is registered at the top of the search order when used repeatedly, so even if the MAC bridge device goes down for some reason, the MAC bridge device is registered at the top of the search order when used repeatedly. Correspondence information between a specific transmission destination gate^C address and a communication boat is immediately registered when the system is started up. Further, since the specific information is not deleted regardless of the non-communication time, the broadcast communication required for learning the routing table can be made unnecessary. Furthermore, for table information that requires a large amount of communication, the search time during operation is shortened, communication time can be shortened, and the throughput of the network as a whole can be improved.

[Brief explanation of drawings]

FIG. 3 is a diagram illustrating a manual registration method in pull. It is. In the drawings, 1 is the low force Lueriane 1~1)-ri(1,8N)1
0 is the protocol data 10a is the MAC sublayer. 10b is logic link control (LLC) sublayer 2
is a media access control (ljAc) bridging device. 20 is a control unit (MCP), 21 is a non-volatile memory 22 is a main storage device (MS). 22a is a routing table. 23 is a communication boat (LS). ■ is the deletion prohibition flag, and ■ is the timer value. are shown respectively. 1

Claims (1)

[Scope of Claims] A local area network (LAN) (1) equipped with the same or different MAC sublayer protocols (10a) can be connected to a logic link control (LLC) sublayer using the MAC sublayer protocol (10a). layer protocol (10b
) in a media access control (MAC) bridge device (2) that transparently relays protocol data of a higher level than the MAC bridge device (2).
A nonvolatile memory (21) is provided in the nonvolatile memory (21), and media access control (MAC) addresses with high communication frequency are manually registered in the nonvolatile memory (21). (MAC) address of the relevant MAC bridge device (
2) At the time of initialization, it is registered in the routing table (22a), and at the time of registration, the manually registered media access control (MAC) address is stored in the routing table (22a) regardless of the non-communication time. In addition to adding a flag (1) that prohibits deletion from the manual, the media access control (MAC) address registered in the manual is added to the routing table (22).
(a) A manual registration method in a MAC bridge routing table, which is characterized in that when registering, the registration is performed at a position that is higher in the search order during operation.