Allied Telesis AT-S101 - Manual (Page 149)

AT-S101 Management Software User’s Guide
149
Link Status
Indicates if the port is connected to (Up) or disconnected from (Down)
another network device.
Port State
Indicates one of the following port states:
ˆ Blocking— A port that would cause a switching loop. In this state,
no user data is sent or received by the port. The port may go into
the forwarding state if the other links in use failed and the spanning
tree algorithm determines the port may transition to the forwarding
state. BPDU data is received in the blocking state.
ˆ Listening— The port processes BPDUs and awaits new
information that would cause the port to return to the blocking
state.
ˆ 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.
ˆ 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.
ˆ 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:
ˆ Disabled— The Disabled Port role is assigned if the port is not
operational or is excluded from the active topology by management
or it is a network access port (IEEE Std 802.1X) and it is
Unauthorized, or its Administrative Bridge Port state is Disabled.
ˆ Root— If the least cost path to the root is through this port, then it
becomes the root port for this bridge.
ˆ Designated— If this is the designated bridge for the LAN and if the
root path cost information received on this port is greater than the
root port's path cost and less than any other port's received
information, then this port becomes the designated port.
ˆ Backup— Any operational Bridge Port that is not a Root or
Designated Port is a Backup Port if the Bridge is the Designated
Bridge for the attached LAN.
ˆ Alternate— Any operational Bridge Port that is not a Root or
a Designated Port is an Alternate Port if that Bridge is not the
Designated Bridge for the attached LAN.
7. In the STP Status column for the port you want to configure, select the
STP status from the list, either Enable or Disable.