SPANNING TREE PROTOCOL CONFIGURATION

STP Port and Trunk Information

The Spanning Tree, STP Port Information and Spanning Tree, STP Trunk Information display the current status of ports and trunks in the Spanning Tree.

Command Attributes

STP Status — Displays current state of this port within the Spanning Tree:

-Discarding — Port receives STP configuration messages, but does not forward packets.

-Learning — Port has transmitted configuration messages for an interval set by the Forward Delay parameter without receiving contradictory information. Port address table is cleared, and the port begins learning addresses.

-Forwarding — Port forwards packets, and continues learning addresses.

The rules defining port status are:

-A port on a network segment with no other STA compliant bridging device is always forwarding.

-If two ports of a switch are connected to the same segment and there is no other STA device attached to this segment, the port with the smaller ID forwards packets and the other is discarding.

-All ports are discarding when the switch is booted, then some of them change state to learning, and then to forwarding.

Forward Transitions – The number of times this port has transitioned from the Learning state to the Forwarding state.

Designated Cost — The cost for a packet to travel from this port to the root in the current Spanning Tree configuration. The slower the media, the higher the cost.

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SMC Networks 10/100/1000 SMCGS8P-Smart manual STP Port and Trunk Information

10/100/1000 SMCGS8P-Smart specifications

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