American Fibertek SM9p - Manual (Page 153)

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Group Configuration interface
Rapid Spanning Tree
The Rapid Spanning Tree Protocol (RSTP) is an evolution of the Spanning Tree Protocol
and provides for faster spanning tree convergence after a topology change. The system
also supports STP and the system will auto detect the connected device that is running
STP or RSTP protocol.
RSTP System Configuration
1. You can view spanning tree information about the Root Bridge.
2. You can modify RSTP state. After modification, save the configuration.
 RSTP mode: you must enable or disable RSTP function before configure the
related parameters.
 Priority (0-61440): a value used to identify the root bridge. The bridge with the
lowest value has the highest priority and is selected as the root. If you change