Someone

ddns-update-style none;

option domain-name-servers 10.10.1.1, 63.203.35.55, 63.200.115.40, 64.169.140.6;
        
default-lease-time 10368000;
max-lease-time 31536000;

one-lease-per-client on;

authoritative;

option subnet-mask            255.0.0.0;

option broadcast-address      10.255.255.255;

subnet 10.0.0.0 netmask 255.0.0.0 {
  range 10.0.0.2 10.0.254.255;

  option subnet-mask            255.0.0.0;
  option routers 10.0.0.1;
  allow bootp;

  next-server 10.10.1.1;

  host xbox {
    hardware ethernet xxxxx;
    fixed-address 10.0.0.10;
  }
}

subnet 10.0.0.0 netmask 255.0.0.0
{
  host router
  {
    hardware ethernet xxxxxx;
    fixed-address 10.10.0.1;
  }

  host wrt
  {
    hardware ethernet xxxxxx;
    fixed-address 10.10.0.16;
  }
}