Cisco packet tracer dynamic

enable

   configure terminal (conf t)

   interface gigabitethernet 0/0 (int Fa0/0)

   ip address 10.10.10.1 255.0.0.0

   no shutdown

  exit  

  interface serial 0

  ip address 192.168.1.1 255.255.255.0

  no shutdown

  exit

 interface gigabitethernet 0

   ip dhcp pool network

   network 10.0.0.0 255.0.0.0

   default – router 10.10.10.1

   exit

   interface serial 0

   ip dhcp pool network

   network 192.168.1.0 255.255.255.0

   default – router 192.168.1.1

   exit

   exit