Transition Networks SISTM10XX-162-LR - Manual (Page 20)

15
Coupling Ring Application
In the network, it may have more than one X-Ring group. By using the coupling ring function can
connect each X-Ring for the redundant backup. It can ensure the transmissions between two ring
groups will no failure. The following figure is a sample of coupling ring application.
Dual Homing Application
Dual Homing function is to prevent a lost connection between X-Ring group and upper level/core
switch. Assign two ports to be the Dual Homing port that is backup port in the X-Ring group. The
Dual Homing function only works when the X-Ring function is active. Each X-Ring group only has
one Dual Homing port.
[NOTE] In Dual Homing application architecture, the upper level switches need to enable the Rapid
Spanning Tree protocol.