Cisco SPS208G User Manual page 191

Spanning Tree
STP Port Settings
SPS208G/SPS224G4/SPS2024 Service Provider Switches User Guide
STP Port Settings Screen
The
•
STP Port Parameters
•
STP Port Table
The STP Port Parameters area contains the following fields:
•
Interface — Define the port or LAG of this STP configuration. The possible
field values are:
-
Unit No.
— Indicates the stacking member on which this STP
configuration is defined.
-
Port
— Indicates the port on which this STP configuration is defined.
-
LAG
— Indicates the LAG on which this STP configuration is defined.
•
Enable STP — Enable or disable STP on the port. The possible field values
are:
-
Checked
— Indicates that STP is enabled on the port.
-
Unchecked
•
Port Fast — Enable or disable Fast Link on the port. If Fast Link mode is
enabled for a port, the Port State is automatically placed in the Forwarding
state when the port link is up. Fast Link optimizes the STP protocol
convergence. STP convergence can take 30-60 seconds in large networks.
The possible field values are:
-
Checked — Indicates that Fast Link is enabled on the port.
-
Unchecked
•
Port State — Displays the current STP state of a port. If enabled, the port
state determines what forwarding action is taken on traffic. Possible port
states are:
-
Disable
— Indicates that STP is currently disabled on the port or if the
port is not active. The port forwards traffic while learning MAC
addresses.
-
Blocking
— Indicates that the port is currently blocked and cannot
forward traffic or learn MAC addresses.
-
Listening — Indicates that the port is in Listening mode. The port cannot
forward traffic nor can it learn MAC addresses.
is divided into two areas:
— Indicates that STP is disabled on the port.
— Indicates that Fast Link is disabled on the port.
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