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A packet forward method and switch

A technology of message forwarding and switching, which is applied in the direction of switching platforms, data switching networks, data switching details, etc., can solve problems such as equipment interference and normal control affecting the production of other port equipment, so as to reduce the impact, ensure industrial production, and improve The effect of production efficiency

Inactive Publication Date: 2008-02-20
SUPCON GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the switches in the industrial control network are currently restricted, mainly because if there is an unauthorized device on the network, the data it sends (especially broadcast data) will spread to all ports, and devices on other ports will be restricted by other ports. Interference, affecting the normal control of production by equipment on other ports

Method used

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  • A packet forward method and switch
  • A packet forward method and switch
  • A packet forward method and switch

Examples

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Embodiment Construction

[0062] The basic idea of ​​the present invention is: establish address list, type list, and set specific address, after receiving message, if sending this message address does not belong to the address in the list, forward through specific address, to avoid unauthorized When the device sends packets and illegal type packets appear, it will affect the normal operation of the device.

[0063] In order for those skilled in the art to have a better understanding of the technical solutions of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0064] Please refer to FIG. 1 , which is a flow chart of Embodiment 1 of a message forwarding method according to the present invention.

[0065] Include the following steps:

[0066] Step S101: Set a list of message types that are allowed to be forwarded, and set a list of authorized device addresses that are allowed to forward messages and a list of...

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PUM

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Abstract

The utility model discloses a packet forwarding method, relating to the technical field of industrial communication. The utility model comprises: a preset list enabling message transmission, a preset authorized equipment address list enabling message transmission in each port and an unauthorized equipment address list disabling message transmission; the source address of the message is judged after the message is received from the port, and then if the source address is judged not to belong to the authorized equipment address list or the address in the unauthorized equipment address list, the message is transmitted via preset special address; if the source address belongs to the address in the authorized equipment address list, and the message belongs to the type in the message type list enabling transmission, then the transmission is performed as the message destination address. The utility model also discloses an exchanger. The utility model has the advantage that when message and illegal message are sent by unauthorized equipment, the normal equipment is not affected with the method and the exchanger.

Description

technical field [0001] The invention relates to the technical field of industrial communication, in particular to a message forwarding method and an industrial switch. Background technique [0002] In the industrial network system, in order to ensure real-time requirements, many servers use the User Datagram Protocol (UDP) broadcast message. In the field bus system, there are many broadcast messages used for periodic data transmission and scheduling. Correspondingly, Its network load is also very large. Therefore, the industrial control network and the monitoring network need to be separated by a proxy or a bridge, and different industrial control networks also need to be separated by a proxy or a bridge. This can better isolate different control networks, but if two different control networks When data exchange is required, the time for data transmission will be extended due to the existence of the agent or bridge. [0003] In the course of the development of industrial c...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/04H04L45/74
Inventor 冯冬芹褚健金建祥刘世龙崔韬
Owner SUPCON GRP
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