7.2.10-packet-tracer---configure-dhcpv4

/* R2 */
en
conf t
ip dhcp excluded-address 192.168.10.1 192.168.10.10
ip dhcp excluded-address 192.168.30.1 192.168.30.10
ip dhcp pool R1-LAN
network 192.168.10.0 255.255.255.0
default-router 192.168.10.1
dns-server 192.168.20.254
exit
ip dhcp pool R3-LAN
network 192.168.30.0 255.255.255.0
default-router 192.168.30.1
dns-server 192.168.20.254
exit

/* R1 */
en
conf t
interface g0/0
ip helper-address 10.1.1.2
exit

/* R3 */
en
conf t
interface g0/0
ip helper-address 10.2.2.2
exit

/* R2 */
interface g0/1
ip address dhcp
no shut