Prepare the Network 

Step 1: Disable all ports by using the shutdown command.

Ensure that the initial switch port states are inactive with the shutdown command. Use the interface-

range command to simplify this task.

S1(config)#interface range fa0/1-24

S1(config-if-range)#shutdown

S1(config-if-range)#interface range gi0/1-2

S1(config-if-range)#shutdown

S2(config)#interface range fa0/1-24

S2(config-if-range)#shutdown

S2(config-if-range)#interface range gi0/1-2

S2(config-if-range)#shutdown

S3(config)#interface range fa0/1-24

S3(config-if-range)#shutdown

S3(config-if-range)#interface range gi0/1-2

S3(config-if-range)#shutdown

Step 2: Re-enable the user ports on S1 and S2 in access mode.

Refer to the topology diagram to determine which switch ports on S2 are activated for end-user device

access. These three ports will be configured for access mode and enabled with the no shutdown

command.

S1(config)#interface fa0/3

S1(config-if)#switchport mode access

S1(config-if)#no shutdown  

S2(config)#interface range fa0/6, fa0/11, fa0/18

S2(config-if-range)#switchport mode access

S2(config-if-range)#no shutdown