R3#sh run | b dhcp
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 ForR4
   host 180.40.7.130 255.255.255.224
   client-identifier 0100.055e.7bc3.00
!
ip dhcp pool ForR3
   host 180.40.7.129 255.255.255.224
   client-identifier 0063.6973.636f.2d30.3031.332e.3630.3330.2e35.6663.302d.4661.302f.30
!


R7#sh run int fa 0/1
Building configuration...

Current configuration : 232 bytes
!
interface FastEthernet0/1
 ip address 180.40.7.131 255.255.255.224
 ip helper-address 180.40.7.66  <-------------- to help R3 get to itself
 speed auto
 half-duplex
 vrrp 47 ip 180.40.7.133
 standby 47 ip 180.40.7.132
 standby 47 preempt
 service-policy output Prob5
end