R2#sh run | b dhcp
ip dhcp pool ForS6
   host 20.10.1.2 255.255.255.0
   client-identifier 0063.6973.636f.2d30.3031.332e.3830.6366.2e65.3738.302d.4661.302f.32
!
!
interface FastEthernet0/1
 ip address 20.10.1.1 255.255.255.0
 ip helper-address 208.28.1.99
 duplex auto
 speed auto
!

R7#sh run int s 1/0.2
Building configuration...

Current configuration : 210 bytes
!
interface Serial1/0.2 point-to-point
 ip address 180.40.7.161 255.255.255.224
 ip helper-address 208.28.1.99
 ip ospf network point-to-multipoint
 frame-relay interface-dlci 702 protocol ip 180.40.7.162
end