Help with layer 2 switching (could be a GNS3 issue)

Hello Experts,

I think I'm having a GNS3 issue, but I want to make sure its not my poor Cisco knowledge causing my problem.  As stated above, I'm running GNS3.  I have setup a router as a layer 2 switch by issueing the following commands
R1# config t
R1(config) no ip routing

I have two hosts on the network.  They are configured as follows:
Host1:
   IP = 10.1.10.10
   SM = 255.255.255.0
   Connected to fa1/2 on R1

Host2:
   IP = 10.1.10.20
   SM = 255.255.255.0
   Connected to fa1/3 on R1

By default both hosts are in vlan 1 and I can ping via IP from Host1 to Host2 and vice versa.

On R1, I have done the following:
R1(config) vlan 10
R1(config)#interface range fa1/2 - 3
R1(config-if-range)#switchport access vlan 10
R1(config-if-range)#no shut

I can still ping between Host1 and Host2.

A "show ip interface brief" on R1 gives me the following:
R1#show ip interface brief
Interface                  IP-Address      OK? Method Status                Protocol
Ethernet0/0                unassigned      YES NVRAM  administratively down down
Serial0/0                  unassigned      YES NVRAM  administratively down down
Serial0/1                  unassigned      YES NVRAM  administratively down down
Serial0/2                  unassigned      YES NVRAM  administratively down down
Serial0/3                  unassigned      YES NVRAM  administratively down down
FastEthernet1/0            unassigned      YES unset  up                    down
FastEthernet1/1            unassigned      YES unset  up                    down
FastEthernet1/2            unassigned      YES unset  up                    up
FastEthernet1/3            unassigned      YES unset  up                    up
FastEthernet1/4            unassigned      YES unset  up                    down
FastEthernet1/5            unassigned      YES unset  up                    down

Next I created a second vlan.  I created it with the following commands:
R1# config t
R1(config) vlan 20
R1(config-vlan) name IT

I then added two more hosts to the network.  They are configured as follows:

Host3:
   IP = 10.1.20.13
   SM = 255.255.255.0
   Connected to fa1/4 on R1

Host4:
   IP = 10.1.20.200
   SM = 255.255.255.0
   Connected to fa1/5 on R1

On R1, I did the following to add the ports to the new vlan:
R1(config)#interface range fa1/4 - 5
R1(config-if-range)#switchport access vlan 20
R1(config-if-range)#no shut

A "show ip interface brief" returns the following:

R1#show ip interface brief
Interface                  IP-Address      OK? Method Status                Protocol
Ethernet0/0                unassigned      YES NVRAM  administratively down down
Serial0/0                  unassigned      YES NVRAM  administratively down down
Serial0/1                  unassigned      YES NVRAM  administratively down down
Serial0/2                  unassigned      YES NVRAM  administratively down down
Serial0/3                  unassigned      YES NVRAM  administratively down down
FastEthernet1/0            unassigned      YES unset  up                    down
FastEthernet1/1            unassigned      YES unset  up                    down
FastEthernet1/2            unassigned      YES unset  up                    up
FastEthernet1/3            unassigned      YES unset  up                    up
FastEthernet1/4            unassigned      YES unset  up                    down
FastEthernet1/5            unassigned      YES unset  up                    down
FastEthernet1/6            unassigned      YES unset  up                    down

A "show vlan-switch" returns the following:
R1#show vlan-switch

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                                active    Fa1/0, Fa1/1, Fa1/6, Fa1/7
                                                   Fa1/8, Fa1/9, Fa1/10, Fa1/11
                                                   Fa1/12, Fa1/13, Fa1/14, Fa1/15
10   VLAN0010                         active    Fa1/2, Fa1/3
20   IT                                        active    Fa1/4, Fa1/5
1002 fddi-default                    act/unsup
1003 token-ring-default         act/unsup
1004 fddinet-default              act/unsup
1005 trnet-default                  act/unsu

My question is why are ports fa1/4 and fa1/5 showing status=up and protocol=down?

Am I missing something configuration wise or something GNS3 wise?

Any help would be greatly appreciated.

Regards,
Nick