Coupling Ring Application - Advantech EKI-7556MI User Manual

2.7 Coupling Ring Application

As the illustration shown below, users can use the X-Ring groups to form a coupling ring for redundant
backup. It can ensure the transmissions between X-Ring groups not to fail. The following figure is a
sample of coupling ring application.
Note The Ethernet switches with firmware version before v3.0 use the X-Ring
function that has the limitations as follows. However, the ones with
firmware version after v3.0 (included) use the X-Ring Pro function that
gets rid of the limitations.
1. To ensure the coupling ring to work normally, the connection between
2. The switches to be configured as members of the Coupling Ring group
3. As the figure illustrated above, Coupling Ring only supports two X-ring
control ports of each X-ring group, as the figure illustrated above,
should always be active.
cannot be the X-Ring Master device of their X-ring group.
groups.
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