The second-layer redundancy technologies solved in the network include MRP ring and STP including Coupling technology, as well as the third-layer redundancy technologies such as active-standby routing and load sharing.
In industrial automation systems, redundant design is often used to improve system reliability and availability. The configuration shown in the figure is a typical redundant configuration, in which:
• The main module is responsible for normal operation and data processing.
• The backup module synchronizes data with the primary module through the Partner Coupling port and is in standby status.
• When the main module fails, the backup module will take over the work through a fast switching mechanism to ensure the continuous operation of the system. This design can reduce the downtime caused by equipment failure and improve the stability and reliability of the entire system.
!!!Notice!!!
The Hirschmann Layer 2 redundancy mechanism requires confirmation that the redundant configuration has been completed before the redundant line is connected.
Before configuring Coupling, disable the RSTP protocol of the ring network switch.
The port auto-adaptation state of the coupling should be turned on
If VLAN is divided, ensure that the coupling port is VLAN Cascade port with ID 1
RM functions should not be used on the same machine as Coupling functions
Hirschmann switches have three Coupling connection modes, and this article mainly discusses ABC.
1 Single Machine Coupling--A
2. Dual-machine Coupling--BC
3 Double-click Coupling with control line--DE
Standby function: Indicates that the module is in standby state. It synchronizes data with the main module, but does not participate in operation under normal circumstances. When the main module fails, the standby module will switch to the working state and take over the functions of the main module.
Solid line--: Main
Dashed line- - - -: spare
Redundant backup function switch is on
Single Machine Coupling Settings
Single machine coupling case
Active/standby link topology diagram
Solid line--: Main link
Dashed line- - - -: backup link
1. Select the single-machine coupling mode, the backup link port is in redundant state, and the main link port is in active state
2. When the primary link is disconnected, the backup link is activated
Port Mode--Displays the port setting status
Port Status--Displays the current status of the port
Information
Redundancy guaranteed: The main link is disconnected and the redundant connection takes effect
Configuration failure: Configuration is incomplete or contains errors
Ring Coupling for ring network coupling
Network Coupling is used for bus network coupling
Extended is extended link redundancy
Dual-machine Coupling Settings
Dual machine coupling case
Active/standby link topology diagram
Solid line--: Main link
Dashed line- - - - : backup link
1. Select Configuration: Select the dual-machine coupling mode with Stand By set to 1
Select Port
Coupling port is Port 5.
IP Address: This is the IP address of the switch connected to the main link
Information
Redundancy guaranteed: When one of the coupling links to the switch fails, the redundant link will take over its role and function.
Configuration failure: whether the configuration is complete
Redundancy Mode
Redundant RingNetwork Coupling: Only one of the primary and backup links is in Active state, and both are not Active at the same time.
Extended Redundancy: When there is a problem with the connection between switches, the primary and backup links will be Active at the same time.
2. Select configuration: Select the dual-machine coupling mode with Stand By set to 0
Select port:
Coupling port is Port 6.
IP Address: This is the IP address of the switch connected to the main link
Normal state
Switch connected to the main link
Select Port
Coupling port:
Port mode/Port state: The port connected to the main link is in Active state
Partner coupling port:
Port mode/Port state: The port connected to the backup link is in the Stand-By state.
Information
Redundancy guaranteed: Checking the front means that the backup link will play a coupling role when the main link connection fails.
Switch connected to the backup link
Select Port
Coupling port:
Port mode/Port state: The port connected to the backup link is in the Stand-By state.
Partner coupling port:
Port mode/Port state: The port connected to the main link is in Active state
disconnect testing
Switch connected to the main link
Select Port
Coupling port:
Port mode/Port state: The connection between the main link and the coupled port has been disconnected.
Partner coupling port:
Port mode/Port state: The backup link is activated and the status is Active
Switch connected to the backup link
Select Port
Coupling port:
Port mode/Port state: The backup link is activated and the status is Active
Partner coupling port:
Port mode/Port state: The connection between the main link and the coupled port has been disconnected.
