Allied Telesis AT-S63 - Manual (Page 288)

Chapter 18: Spanning Tree and Rapid Spanning Tree Protocols
288 Section IV: Spanning Tree Protocols
The possible states for a port connected to a device running STP are
Listening, Learning, Forwarding, and Blocking.
The possible states for a port not being used or where spanning tree is
not activated is Disabled.
Role
The RSTP role of the port. Possible roles are:
Root - The port that is connected to the root switch, directly or through
other switches, with the least path cost.
Alternate - The port offers an alternate path in the direction of the root
switch.
Backup - The port on a designated switch that provides a backup for
the path provided by the designated port.
Designated - The port on the designated switch for a LAN that has the
least cost path to the root switch. This port connects the LAN to the
root switch.
Edge-Port
Whether or not the port is operating as an edge port. The possible
settings are Yes and No.
P2P
Whether or not the port is functioning as a point-to-point port. The
possible settings are Yes and No.
Version
Whether the port is operating in RSTP mode or STP-compatible mode.
Port Cost
The port cost of the port.
An example of the RSTP Settings page is shown in Figure 119.
Figure 119. RSTP Settings Page
The RSTP Settings page displays a table with the following columns of
information:
Port
The port number.