Cisco VRF Configuration issue

Trying to get VRF forwarding on an interface in Cisco IOS 15.4.  We currently have a router with 15.2 and have no trouble with it:

interface FastEthernet0/0/3
 switchport access vlan 3
 ip vrf forwarding INTERNAL
 no ip address


But when I try to configure this on the 15.4 router, I get an error:

Test(config)#int f0/1/3
Test(config-if)#ip vrf forwarding INTERNAL
                   ^
% Invalid input detected at '^' marker.

Test(config-if)#


IP vrf isn't an option:
Test(config-if)#ip ?
Interface IP configuration subcommands:
  address     Set the IP address of an interface
  admission   Apply Network Admission Control
  auth-proxy  Apply authentication proxy
  ddns        Configure dynamic DNS
  device      IP device tracking
  dhcp        Configure DHCP parameters for this interface
  igmp        IGMP interface commands
  rsvp        RSVP Interface Commands

Test(config-if)#ip



I do have vrf configured in the global:

ip vrf INTERNAL
 description Trusted Network
 rd xxxxx:10
!
ip vrf INTERNET
 description Internet Traffic
 rd xxxxx:20
 inter-as-hybrid


Any ideas what I'm missing here?