After sticky learning of MAC addresses is enabled, what action is needed to prevent dynamically learned MAC addresses from being lost in the event that an associated interface goes down?

After sticky learning of MAC addresses is enabled, what action is needed to prevent dynamically learned MAC addresses from being lost in the event that an associated interface goes down?

  • Shut down the interface then enable it again with the no shutdown command.
  • Configure port security for violation protect mode.
  • Reboot the switch.
  • Copy the running configuration to the startup configuration.  
    Answers Explanation & Hints:

    When sticky learning is enabled, dynamically learned MAC addresses are stored in the running configuration in RAM and will be lost if the switch is rebooted or an interface goes down. To prevent the loss of learned MAC addresses, an administrator can save the running configuration into the startup configuration in NVRAM.

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