Main-standby link switch and link redundancy backup method and device

Abstract

Embodiments of the invention disclose a main-standby link switch and link redundancy backup method and device. A main-standby link switch method is applied to a first switching device and can comprise the following steps: receiving a fault communication message; looking up a corresponding port according to a port number of a port allocated to a corresponding link aiming at each backup group per se and recorded in a local configuration information list; and setting the found port as a started state, and setting a first link connected with the port as a communication state. The link redundancy backup method is applied to the first switching device and can comprises the following steps: monitoring a link state per se with a DRP ring network link connected with the second switching device; looking up each port at a blocked state; and selecting one port from the found ports, and setting the port as the started state. The main-standby link switch method and the link redundancy backup method in the technical scheme provided by the embodiments of the invention are used for reducing the operation cost of link redundancy backup, and millisecond-level switching requirements in industrial application can be satisfied.

Description

technical field [0001] The invention relates to the technical field of industrial Ethernet, in particular to a method and device for switching between active and standby links and realizing link redundancy backup. Background technique [0002] In the existing DRP (Distributed Redundancy Protocol, Distributed Redundancy Protocol) ring network, each switching device that constitutes the DRP ring network is in an equal position, and each switching device maintains the network status within a fixed allocated time slice, and sends network maintenance message, other switching devices fill in the network status of the current ring port in the maintenance message, and forward the network maintenance message. After the next time slot arrives, the switching device corresponding to the time slot in the DRP ring network will maintain network. [0003] In practical applications, switching devices can be located in industrial Ethernet sites, such as substations, and two switching devices...

AI Technical Summary

Problems solved by technology

[0006] The cost of the dual-network card terminal and the RSTP terminal used in the existing two methods is high, which increases the cost of redundant backup of the link, and the low-cost common hub HUB port terminal cannot be used in these two methods. use

In addition, when the RSTP terminal uses a link failure, the time to regenerate the network topology will be limited by the number of switching devices included in the DRP ring network. When there are many switching devices in the DRP ring network, each switching device The redundant backup of the link can only be realized after the network state maintenance is completed within the allocated time slice, and the redundant backup time will reach the second level, which cannot meet the millisecond-level switching requirements in industrial applications

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