Resolution
Create a VLAN, and configure a Layer 3 (L3) VLAN interface. Assign an IP address for this interface, as shown:
Switch(config)# vlan vlan_ID
Switch(config)# interface vlan vlan_ID
Switch(config-if)# ip address ip_address subnet_mask
Configure the switch port as a Layer 2 (L2) access port, and associate the access port to a VLAN, as shown:
Switch(config)# interface {fastethernet | gigabitethernet} slot/port
Switch(config-if)# switchport mode access
Switch(config-if)# switchport access vlan vlan_num
You can also assign multiple interfaces into a VLAN, as shown:
Switch(config)# interface range {vlan vlan_ID} {{fastethernet | gigabitethernet | macro macro_name} slot/interface-interface}
Switch(config-if-range)# switchport access vlan vlan-id
Switch(config-if-range)# switchport mode access
For more information on creating a new VLAN and assigning interfaces to a Catalyst 4500 series switch running Cisco IOS Software, refer to these documents: