R2#sh run | b dhcp
!
ip dhcp pool S6
   host 20.10.1.2 255.255.255.0
   client-identifier 0063.6973.636f.2d30.3031.322e.3766.3538.2e31.3330.302d.4661.302f.34
!
!
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 0/0/0.2
Building configuration...

Current configuration : 279 bytes
!
interface Serial0/0/0.2 point-to-point
 bandwidth 1544
 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 priority-dlci-group 1 702 702 702 702
 frame-relay interface-dlci 702 protocol ip 180.40.7.162
end