R3#sh run | b dhcp
ip dhcp excluded-address 180.40.7.129
ip dhcp excluded-address 180.40.7.131 180.40.7.134
!
ip dhcp pool Prob15
   network 180.40.7.128 255.255.255.224
   default-router 180.40.7.132
   domain-name cciestudent.com
   dns-server 208.28.1.82
   option 150 ip 20.20.20.20
!
ip dhcp pool R4
   host 180.40.7.130 255.255.255.224
   client-identifier 0100.024b.cb56.e0
!



R4#sh run int fa 0/0
Building configuration...

Current configuration : 128 bytes
!
interface FastEthernet0/0
 ip address dhcp client-id FastEthernet0/0
 duplex auto
 speed auto
 service-policy input test
end

R4#sh ip int brie
Interface                  IP-Address      OK? Method Status                Protocol
FastEthernet0/0            180.40.7.130    YES DHCP   up                    up     
ATM1/0                     unassigned      YES unset  administratively down down   
Loopback0                  100.1.1.1       YES manual up                    up     
R4#