Self-adaptive Ethernet single-loop network algorithm

Abstract

A self-adaptive Ethernet single-loop network algorithm is operated on a dual-layer interchanger. According to the algorithm, a special BPDU (Bridge Protocol Data Unit) report is designed, and a linkup message in the BPDU report performs forwarding and comparing in a loop network to determine two ports of a root interchanger and the loop network. When the interchanger is started or is connected with the port, the linkup message is sent to judge the looped end port and the root interchanger; the own linkup message is received, and two looped ports are calculated; whether the interchanger is the root interchanger or not is judged, if yes, the root interchanger sends a finishing message and a notification message, and if not, the notification message is sent. The message is forwarded after the notification message is received, and the linkup message is sent to determine the own loop network port; the connected port is set to be in the forwarding state after the finishing message is received, a mac (media access control) address table is emptied, and the message is forwarded. The interchanger regularly scans the continuous change, a linkdown message is sent if a looped port is offline, the message is processed according to the interchanger and a responding message is sent.

Description

technical field [0001] The invention is an adaptive Ethernet single-ring network algorithm and belongs to the field of network communication. Specifically, it relates to a software algorithm running on an Ethernet switch. Background technique [0002] It is more and more common to use Ethernet as the transmission network in the modern industrial communication environment. Industrial communication has high requirements on the stability and reliability of data transmission. The industrial communication network built on the basis of Ethernet switches must make certain improvements to meet this requirement. kind of request. The invention designs an adaptive Ethernet single-ring network algorithm to ensure the stability and reliability of communication. The self-adaptive Ethernet single-ring network algorithm works on the data link layer, mainly runs on the switch, supports the single-ring topology between the switches, uses the specific functions of the switching chip and the ...

AI Technical Summary

Problems solved by technology

[0003] The switch is the core network device for building the Ethernet. Generally, the switches are directly connected by a linear connection, but the linear connection has a disadvantage: when a line failure in the linear connection will cause the entire network communication to be interrupted

Switches connected with a ring topology generally use a private ring network protocol and a standard RSTP protocol. The standard RSTP protocol has redundant backup and link switching functions, but the link switching time is between several seconds to tens of seconds, and the self-healing time Too long to meet industrial requirements

The private ring network protocol requires the administrator to set the root switch and ring ports, which is inconvenient to use

Switch ports can cause network storms if operators mistakenly connect

[0004] In order to overcome the shortcoming that the traditional RSTP protocol self-healing time is too long, the present invention proposes an adaptive Ethernet single-ring network algorithm. This algorithm supports ring topology, has redundant backup and link switching functions, and can automatically select the ring-forming switch. At the same time, select a switch in the ring network as the root switch automatically or according to the settings of the administrator

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