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