Switch>enable
Switch#config terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#hostname LabSwitch
LabSwitch(config)#interface VLAN 1
LabSwitch(config-if)#interface VLAN1 
LabSwitch(config-if)#interface?
% Unrecognized command
LabSwitch(config-if)#interface ?     
% Unrecognized command
LabSwitch(config-if)#interface 
% Incomplete command.

LabSwitch(config)#interface ?
  Async              Async interface
  BVI                Bridge-Group Virtual Interface
  Dialer             Dialer interface
  FastEthernet       FastEthernet IEEE 802.3
  Group-Async        Async Group interface
  Lex                Lex interface
  Loopback           Loopback interface
  Multilink          Multilink-group interface
  Null               Null interface
  Port-channel       Ethernet Channel of interfaces
  Transparent        Transparent interface
  Tunnel             Tunnel interface
  Virtual-Template   Virtual Template interface
  Virtual-TokenRing  Virtual TokenRing
  Vlan               Catalyst Vlans
  fcpa               Fiber Channel
  range              interface range command

LabSwitch(config)#interface VLAN1 ?
  <cr>

LabSwitch(config)#interface VLAN? 
Vlan  

LabSwitch(config)#interface VLAN ?
  <1-1005>  Vlan interface number

LabSwitch(config)#interface VLAN 
% Incomplete command.

LabSwitch(config)#interface VLAN1
LabSwitch(config-if)#ip address 10.1.1.100 255.255.255.0
LabSwitch(config-if)#no shutdown
LabSwitch(config-if)#exit
LabSwitch(config)#exit
LabSwitch#
18:59:14: %SYS-5-CONFIG_I: Configured from console by console