Milan Technology MIL-SM2401M-STK - Manual (Page 182)

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7-4-8. Spanning Tree
The Spanning-Tree Protocol (STP) is a standardized method (IEEE 802.1D) for
avoiding loops in switched networks. When STP is enabled it ensures that only
one path at a time is active between any two nodes on the network.
Spanning-Tree Protocol can be enabled using web management’s switch
setting advanced item, and selecting enable Spanning-Tree protocol. By default,
spanning tree is disabled on the switch.
It is recommended that STP be enabled on all switches to ensure a single active
path on the network.