B&B Electronics EIR618-2SFP-T - Manual - Manual (Page 31)

Manual Documentation Number: EIR618-2SFP-T_4812m 31
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Dual Homing Application
Dual Homing function is to prevent the connection lose 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
work 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.