The ports on a Catalyst 6500/6000 or a Catalyst 4500/4000 running Cisco IOS Software can act as L2 switchports or L3 routed ports depending on the configuration

Layer2

config t

interface ethernet0/1

switchport mode access

switchport access vlan 10

no shut

Layer 3 you simply turn off sitchport mode access and route through the interface

by the following

Interface ethernet0/1

no switch mo access

ip addr x.x.x.x y.y.y.y

or you can run a virtual vlan interface and route through it

config t

interface vlan 10

ip addr x.x.x.x y.y.y.y HTH