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Chapter 22: Spanning Tree and Rapid Spanning Tree Protocols
438 Section V: 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.
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.
Resetting RSTP
to the Default
Settings
To reset RSTP to the default settings, perform the following procedure:
1. From the Main Menu, type 3 to select Spanning Tree Configuration.
The Spanning Tree Configuration menu is shown in Figure 152 on
page 420.
2. From the Spanning Tree Configuration menu, type 3 to select
Configure Active Protocol.
The RSTP menu is shown in Figure 157 on page 431.
3. From the RSTP Menu, type D to select Reset RSTP to Defaults.
The following prompt is displayed:
Do you want to reset RSTP configuration to default [Yes/
No] ->
4. Type Y for Yes or N for No and press Return.
The RSTP configuration is reset to the defaults.