Milan Technology MIL-SM2401MAF - Manual (Page 150)

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System Configuration
1. You can view spanning tree information about the Root Bridge.
2. You can view spanning tree status about the switch.
3. You can modify STP state. After modification, click Apply button.
Priority: assign path priority number.
Max Age: the maximum path age
Hello Time: the time that controls switch sends out the BPDU packet to check
STP current status.
Forward Delay Time: forward delay time.
Spanning Tree – System Configuration interface