configure terminal
  ip dhcp excluded-address 172.16.1.1 172.16.1.9
  ip dhcp excluded-address 172.16.2.1 172.16.2.9
  ip dhcp pool DATA_SCOPE
    network 172.16.2.0 255.255.255.0
    default-router 172.16.2.1
    dns-server 4.2.2.2
    exit
  ip dhcp pool VOICE_SCOPE
    network 172.16.1.0 255.255.255.0
    default-router 172.16.1.1
    option 150 ip 172.16.1.1
    dns-server 4.2.2.2