Allied Telesis AT-S63 - Manual (Page 258)

Chapter 16: Rapid Spanning Tree Protocols Commands
258 Section III: Spanning Tree Protocols
The information displayed by the command is as follows:
ˆ Port — The port number.
ˆ State — The RSTP state of the port. The possible states for a port
connected to another device running RSTP are Discarding and
Forwarding.
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.
ˆ Role — The RSTP role of the port. Possible roles are:
Root - The port is connected to the root switch, directly or through
other switches, with the least path cost.
Alternate - The port offers an alternate path to 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 has the least cost path to the root switch.
ˆ P2P — Whether or not the port is functioning as a point-to-point port.
The possible settings are Yes and No.
ˆ Version — Whether the port is operating in RSTP mode or STP-
compatible mode.
ˆ Port Cost — The current operating cost of the port.
Examples
This command displays the bridge’s RSTP settings:
show rstp
This command displays the RSTP port settings for ports 3.1 to 3.4:
show rstp portconfig=3.1-3.4
This command displays RSTP port status for port 4.15:
show rstp portstate=4.15