R3#sh run | b ip dhcp
ip dhcp excluded-address 180.40.7.129
ip dhcp excluded-address 180.40.7.131 180.40.7.132
!
ip dhcp pool Prob11
   network 180.40.7.128 255.255.255.224
   default-router 180.40.7.132
   dns-server 208.28.1.82
   domain-name bassconsulting.com
   option 150 ip 20.20.20.20
!
ip dhcp pool R4
   host 180.40.7.130 255.255.255.224
   client-identifier 0063.6973.636f.2d30.3033.302e.3835.6633.2e37.3032.302d.4661.302f.30
!
ip cef
no ip domain lookup
ip audit po max-events 100
!
!
!
!
!

R3#
RACK1AS>4
[Resuming connection 4 to r4 ... ]

*Mar  1
R4#sh run int fa0/0
Building configuration...

Current configuration : 75 bytes
!
interface FastEthernet0/0
 ip address dhcp
 duplex auto
 speed auto
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#