Description: This lab exercise demonstrates the usage of the
backbonefast command on the switch.
1. Enter into the global configuration mode on the switch.
2. Use the command "Spanning-tree backbonefast" to enable
backbonefast feature on the switch and verify the same using show
3. Use the no form of the above command to disable the backbonefast on
switch and verify the same using show spanning-tree summary command.