Method of automatically distributing network addresses for cascaded devices based on link layer data communication

Abstract

The invention discloses a method of automatically distributing network addresses for cascaded devices based on link layer data communication. The method comprises steps: a target mac address and a special target mac address are acquired; a plaintext check code and a link layer check code are acquired; a network address is deleted or marked in a data frame in the link layer; the number of remaining network addresses is calculated; and packaging on the data frame in the link layer is carried out. By adopting the above technology, a static network address distributed for each cascaded device can be ensured not to conflict, any manual processing is not needed, the specific physical location of the device can be determined and acquired through the network address, and control on a specific device at a certain position through the network address is extremely convenient and determined; the method can be adopted independently and can also be wholly integrated to other methods or separately integrated to other methods, and the method has the beneficial effects that the intelligent degree is high, the maintainability is strong, the reliability is strong, and influences on system operation by human factors are eliminated.

Description

technical field [0001] The invention relates to the technical field of Ethernet, in particular to a method for automatically assigning static network addresses when both ends or one end of cascading (series) equipment in a single cascading link is connected to the Ethernet network. Background technique [0002] The devices connected to the Ethernet network can have various forms, one is direct access to form a star network topology, the other is connected devices form a bus topology through serial connections, and the serial The connected cascade devices are connected by Ethernet. At the same time, the current technical solutions mainly include the following three types: [0003] (1) By manually setting the static network address of each cascade device; [0004] (2) Configure the static network address through dial switches, hard wiring, address lines, etc.; [0005] (3) Dynamically allocate IP (network address) through DHCP, and then the device will statically allocate t...

AI Technical Summary

Problems solved by technology

[0007] (1) It is time-consuming and labor-intensive to manually set the static network addresses of each cascaded device, and there may be human errors that may lead to network address setting errors or network address conflicts

[0008] (2) Manual maintenance and setting are also required through the dial switch, hard wiring, address line, etc., and there are also possible human errors, dropping of the dial switch, disconnection of the hard wiring and the address line, etc. Network address setting error or network address conflict phenomenon

[0009] (3) Dynamic address allocation is carried out through DHCP, and then the device performs static dynamic address. Multiple DHCPs may exist in the network at the same time, resulting in address allocation conflicts. There may also be address conflicts during the DHCP allocation process. Moreover, DHCP The IP address assigned by the method cannot locate the specific device location through the IP address, and the corresponding event and control cannot be deterministically processed through the IP address for specific control requirements (for example, when there is event linkage, it is impossible to determine the need for a certain IP address) Linkage with the corresponding equipment)

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