DELL S50V User Manual

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Rapid Spanning Tree Protocol

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On interfaces in Layer 2 mode, you can set the port cost and port priority values.

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Port cost is a value that is based on the interface type. The default values are listed in 

greater the port cost, the less likely the port will be selected to be a forwarding port.

•

Port priority influences the likelihood that a port will be selected to be a forwarding port in case that 
several ports have the same port cost.

To change the port cost or priority of an interface, use the following commands: 

View the current values for interface parameters using the 

 

rstp 

command from EXEC 

.

The EdgePort feature enables interfaces to begin forwarding traffic approximately 30 seconds sooner. In 
this mode an interface forwards frames by default until it receives a BPDU that indicates that it should 
behave otherwise; it does not go through the Learning and Listening states. The 

 option causes the interface hardware to be shutdown when it receives a BPDU. 

When only 

 is implemented, although the interface is placed in an Error Disabled state when 

receiving the BPDU, the physical interface remains up and spanning-tree will drop

packets in the hardware 

after a BPDU violation. BPDUs are dropped in the software after receiving the BPDU violation. This 
feature is the same as PortFast mode in Spanning Tree.

To enable EdgePort on an interface, use the following command:

Change the port cost of an interface.
Range: 0 to 65535
Default: see 

.

 

INTERFACE

Change the port priority of an interface.
Range: 0 to 15
Default: 128

 

INTERFACE

Configure EdgePort only on links connecting to an end station. EdgePort can cause loops if it is enabled 

on an interface connected to a network. 

Enable EdgePort on an interface.

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INTERFACE