Puts the interface in Layer 2 mode and sets the switching characteristics of the Layer 2 interface.
All Layer 2 interfaces are mapped to default VLAN 1 and the interface is set to access mode.
Interface subtype configuration mode
For changing the interface configuration mode to trunk or changing the default VLAN mapping, use additional switchport commands.
To redefine the switch from Layer 2 mode into Layer 3 mode, enter no switchport.
To put a specific Ethernet interface in Layer 2 mode:
device# configure terminal switch(config)# interface ethernet 1/9 switch(conf-if-eth-1/9)# switchport
To remove a specific port-channel interface from Layer 2 mode:
device# configure terminal switch(config)# interface port-channel 44 switch(config-Port-channel-44)# no switchport