Cisco Systems SRW248G4PK9NA User Manual

Defining Spanning Tree Interface Settings

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Cisco Small Business 300 Series Managed Switch Administration Guide 

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Topology Changes Counts—The total number of STP topology changes 
that have occurred.

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Last Topology Change—The time interval that elapsed since the last 
topology change occurred. The time appears in a days/hours/minutes/
seconds format.

Click Apply. The STP Global settings are written to the Running Configuration file.

The STP Interface Settings page enables you to configure STP on a per-port 
basis, and to view the information learned by the protocol, such as the designated 
bridge.

The defined configuration entered is valid for all flavors of the STP protocol.

To configure STP on an interface:

Click Spanning Tree > STP Interface Settings.

Select an interface and click Edit.

Enter the parameters

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Interface—Select the Port or LAG on which Spanning Tree is configured.

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STP—Enables or disables STP on the port.

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Edge Port—Enables or disables Fast Link on the port. If Fast Link mode is 
enabled on a port, the port is automatically set to   Forwarding state when 
the port link is up. Fast Link optimizes the STP protocol convergence. The 
options are:

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Enable—Enables Fast Link immediately.

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Auto—Enables Fast Link a few seconds after the interface becomes 
active. This allows STP to resolve loops before enabling Fast Link.

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Disable—Disables Fast Link.

It is recommended to set the value to Auto so that the device sets 

the port to fast link mode if a host is connected to it, or sets it as a regular 
STP port if connected to another device. This helps avoid loops.