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Dell Configuration Guide for the S4048–ON System 9.14.2.6

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Modifying Interface Parameters

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

  • Port cost — a value that is based on the interface type. The previous table lists the default values. The greater the port cost, the less likely the port is selected to be a forwarding port.
  • Port priority — influences the likelihood that a port is 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.

  • Change the port cost of an interface.
    INTERFACE mode
    spanning-tree rstp cost cost
    The range is from 0 to 65535.
    The default is listed in the previous table.
  • Change the port priority of an interface.
    INTERFACE mode
    spanning-tree rstp priority priority-value
    The range is from 0 to 15.
    The default is 128.
To view the current values for interface parameters, use the show spanning-tree rstp command from EXEC privilege mode.

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