PLANET ISW-1022MPT - Manual (Page 41)

User’s Manual of ISW-1022M Series and ISW-1033MT
41
3.3 Dual Homing Application
Dual Homing function is to prevent the connection lose from 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.
In Dual Homing application architecture, the upper level switches need to enable the Rapid
Spanning Tree protocol.