JPH07154429A - Automatic duplex method for lan-wan-lan connection ip router - Google Patents

Abstract

PURPOSE:To automatically switch an IP router without changing the terminal routing setting by allowing a secondary IP router to take over routing information, the MAC address, etc., in the case that a primary IP router is faulty. CONSTITUTION:Normally, communication is performed through the route passing a node WS1 on an IP network A2, a primary IP router R1 of the IP network A2, a primary IP router R3 of an IP network W3, and a node WS2 on the IP network B3 in order, and a secondary IP router R2 of the IP network A2 always monitors the state of the primary IP router R1. That is, routers R1 and R2 monitor the states of each other, and the MAC address end the IP address of the router R2 are substituted with those of the router R1 if it is judged that the router R1 is faulty. Then, communication is performed through the route passing the node WS1, the router R2(R1) the router R3, and the node WS2 in order, and communication between nodes WS1 and WS2 is compensated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to LAN connection technology.
The present invention relates to an automatic duplication method for an IP router connected to AN-WAN-LAN.

[0002]

2. Description of the Related Art Conventionally, LAN-WAN-LAN connection IP
In the router duplication method, the IP router is duplicated by using a dynamic routing protocol.

[0003]

However, in the conventional LAN-WAN-LAN connection, in the method of duplicating the IP router by using the dynamic routing protocol, when the terminal side can define the routing only by the static protocol. However, if an IP router fails in what is recognized by the terminal, there is a problem that normal communication cannot be performed unless the setting on the terminal side is changed even if the router is duplicated.

The present invention has been made to solve the above-mentioned conventional problems, and when a failure occurs in the first IP router, the routing setting of the terminal is not changed and I
LAN-WAM-LAN connection I that automatically switches P routers to compensate for communication between LAN-WAN-LAN terminals
It is an object of the present invention to provide an automatic duplication method for a P router.

[0005]

The present invention is a LAN-WA.
In the automatic duplication method of the N-LAN connection IP router,
Provide a primary IP router and a secondary IP router,
When the secondary IP router monitors the primary IP router at regular intervals and the primary IP router fails, the MAC address and IP of the secondary IP router
The object is achieved by replacing the address with the address of the primary IP router and operating to realize automatic duplication of the LAN-WAN-LAN connection IP router without changing the routing setting of the terminal.

[0006]

In the present invention, the secondary router monitors the primary router, and when a failure occurs in the primary router, the secondary router receives the MAC of the primary router.
Since the IP address and IP address are used for operation, even if the primary router fails, the terminal seems to have a primary router even if the target router fails. Communication between LAN-WAN-LAN terminals can be normally performed without changing the terminal settings.

[0007]

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

FIG. 1 is a configuration diagram showing a network configuration according to the present embodiment. 1 is an integrated service digital network (ISDN), 2 and 3 are IP networks A and B connected by ISDN 1, respectively.
Is. WS1 is a node on the network A2, W
S2 is a node on the network B3, R1 is a primary IP router of the IP network A2, R2 is a secondary IP router of the IP network A2, R3 is a primary IP router of the IP network B3, and R4 is a secondary IP router of the IP network B3. In the following description, only the symbols will be used.

Further, (1), (2) and (3) show communication routes when the network terminals WS1 and WS2 communicate with each other, the contents of which are shown in the table of FIG.

The operation of this embodiment will be described below.

First, in a normal state, as shown in (1) of FIGS. 1 and 2, communication is performed through a route of WS1 → R1 → R3 → WS2. At that time, R2 constantly monitors the state of R1, as shown in the flowchart of FIG. That is, in step 100 of FIG. 3, R1 periodically checks its own operation state and notifies R2 of this, and always repeats this operation.

Conventionally, as shown by the communication route (2) in FIGS. 1 and 2, when R1 fails, R2 operates as a router in place of R1. However, as can be seen from the address and the routing information of WS1 shown in the routing table of FIG. 5, the IP address and MAC address of the IP router recognized by WS1 are A. 2 and 2, indicating R1, while R2 indicates A.I. Since it is 3 and 3 and the information of R1 is not inherited, WS1 is WS
When it communicates with 2, it is designed to transmit to R1, but since R1 is out of order, communication between WS1 and WS2 cannot be performed.

In the present invention, the processing shown in the flowchart of FIG. 4 is performed. That is, the state is constantly monitored between R1 and R2, and if it is determined in step 200 of FIG. 4 that R1 is faulty, the next step 210 is to determine the MAC address and IP address of R2 as shown in FIG. Replace with the address of R1.

As a result, the R2 takes over the routing information, the MAC address, and the IP address of the R1, as shown by the communication route of (3) in FIGS. 1 and 2.
Communication is performed through the route of WS1 → R2 (R1) → R3 → WS2, and the communication between WS1 and WS2 can be compensated.

[0015]

As described above, according to the present invention,
The secondary IP router monitors the status of the primary IP router, and if the primary IP router fails, the secondary IP router takes over the routing information, the MAC address, and the IP address of the primary IP router, and thus the first IP router. Has failed,
When it is automatically switched to another IP router, the IP router is automatically switched without changing the settings of many LAN side terminals, and it is a perfect compensator for communication between LAN-WAN-LAN terminals. This has an effect that the automatic duplication of the IP router in the LAN-WAN-LAM connection can be realized.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a network configuration of a present embodiment.

FIG. 2 is a table showing communication routes between network terminals

FIG. 3 is a flowchart showing how the secondary IP router monitors the primary IP router.

FIG. 4 is a flowchart showing a process of automatically replacing an IP router when a failure occurs.

FIG. 5 is a table showing addresses and routing information

[Explanation of symbols]

 1 ... Integrated service digital network (ISDN) 2 ... IP network A 3 ... IP network B WS1 ... Node on network A WS2 ... Node on network B R1 ... Primary IP router of network A R2 ... Secondary IP router of network A R3 ... Primary IP router of network B R4 ... Secondary IP router of network B

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Claims (1)

[Claims] 1. A method for automatically duplicating a LAN-WAN-LAN connecting IP router, wherein a primary IP router and a secondary IP router are provided.
The secondary IP router monitors the primary IP router at regular intervals, and when a failure occurs in the primary IP router, the MAC address and IP address of the secondary IP router are replaced with the address of the primary IP router, and the operation is performed. LAN-W without changing routing settings
An automatic duplexing method for an LAN-WAN-LAN connecting IP router, characterized by realizing automatic duplexing for an AN-LAN connecting IP router.