Allied Telesis AT-GS950/24, User Manual

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AlliedWare Plus Version 2.1.2 Management Software Web Browser User’s Guide
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Figure 42. AT-GS950/24 RSTP Advanced Port Configuration Page
This page displays the following information about the ports:
Port - Indicates ports 1 through 24 on the AT-GS950/24 switch.
Use the All row to apply the same settings to the STP Status,
Priority, and Path Cost fields to all the ports on your switch.
Trunk - Indicates the trunk assignment of a port.
Link - Indicates that the port’s link is active (Up) or inactive (Down).
State - Indicates one of the following port states:
Blocking - A blocking state does not allow network traffic to be
sent or received on a the port except for BPDU data. A port with
a higher path cost to the root bridge than another on the switch
causes a switching loop and is placed in the blocking state by
the Spanning Tree algorithm. The port’s state may change to the
forwarding state if the other links in use fail and the Spanning
Tree algorithm determines the port may transition to the
forwarding
state.
Listening - This state occurs on a port during the convergence
process. The port in the listening state processes BPDUs and
awaits new information that would cause the port to return to the
blocking state.
Learning - While the port does not yet forward frames
(packets), in this state the port does learn source addresses
from frames received and adds them to the filtering (switching)
database.
Forwarding - A port that both receives and sends data. This
indicates normal operation. STP continues to monitor the port
for incoming BPDUs that indicate the port should return to the
blocking state to prevent a loop.
Disabled - This state is not strictly part of STP. However, a
network administrator can manually disable a port.
Role - Indicates one of the following port roles: