CONFIGURING THE SWITCH
Command Attributes
The following attributes are
•Port Status – Displays current state of this port within the Spanning Tree:
-Disabled - The port has been disabled by the user or has failed diagnostics.
-Blocking - Port receives STA configuration messages, but does not forward packets.
-Listening - Port will leave blocking state due to a topology change, start transmitting configuration messages, but does not yet 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.
-Broken - Port is malfunctioning or no link has been established.
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 blocked.
•All ports are blocked when the switch is booted, then some of them change state to listening, to learning, and then to forwarding.
•Forward Transitions – The number of times this port has transitioned from the Learning state to the Forwarding state.
