No subnet declaration for <my interface here> (no IPv4 addresses).
** Ignoring requests on <my interface here>.  If this is not what
you want, please write a subnet declaration
in your dhcpd.conf file for the network segment
to which interface <my interface here> is attached. **

subnet <subnet info> netmask <netmask info> {
  option routers <router IP>;
  group fixed-address {
    host host16-interface0  { hardware ethernet 02:01:00:00:00:00; fixed-address host16-interface0 ; }
    host host16-interface1  { hardware ethernet 02:01:00:00:00:01; fixed-address host16-interface1 ; }
    host host16-interface2  { hardware ethernet 02:01:00:00:00:02; fixed-address host16-interface2 ; }
    host host16-interface3  { hardware ethernet 02:01:00:00:00:03; fixed-address host16-interface3 ; }
    host host16-interface4  { hardware ethernet 02:01:00:00:00:04; fixed-address host16-interface4 ; }
    host host16-interface5  { hardware ethernet 02:01:00:00:00:05; fixed-address host16-interface5 ; }
    host host16-interface6  { hardware ethernet 02:01:00:00:00:06; fixed-address host16-interface6 ; }
    host host16-interface7  { hardware ethernet 02:01:00:00:00:07; fixed-address host16-interface7 ; }
    host host16-interface8  { hardware ethernet 02:01:00:00:00:08; fixed-address host16-interface8 ; }
    host host16-interface9  { hardware ethernet 02:01:00:00:00:09; fixed-address host16-interface9 ; }
    host host16-interface10 { hardware ethernet 02:01:00:00:00:0a; fixed-address host16-interface10; }
    host host16-interface11 { hardware ethernet 02:01:00:00:00:0b; fixed-address host16-interface11; }
    host host16-interface12 { hardware ethernet 02:01:00:00:00:0c; fixed-address host16-interface12; }
  }
}

subnet <subnet info> netmask <netmask info> {
  option routers <router IP>;
  group fixed-address {
    host host17-interface0  { hardware ethernet 02:01:00:00:00:00; fixed-address host17-interface0 ; }
    host host17-interface1  { hardware ethernet 02:01:00:00:00:01; fixed-address host17-interface1 ; }
    host host17-interface2  { hardware ethernet 02:01:00:00:00:02; fixed-address host17-interface2 ; }
    host host17-interface3  { hardware ethernet 02:01:00:00:00:03; fixed-address host17-interface3 ; }
    host host17-interface4  { hardware ethernet 02:01:00:00:00:04; fixed-address host17-interface4 ; }
    host host17-interface5  { hardware ethernet 02:01:00:00:00:05; fixed-address host17-interface5 ; }
    host host17-interface6  { hardware ethernet 02:01:00:00:00:06; fixed-address host17-interface6 ; }
    host host17-interface7  { hardware ethernet 02:01:00:00:00:07; fixed-address host17-interface7 ; }
    host host17-interface8  { hardware ethernet 02:01:00:00:00:08; fixed-address host17-interface8 ; }
    host host17-interface9  { hardware ethernet 02:01:00:00:00:09; fixed-address host17-interface9 ; }
    host host17-interface10 { hardware ethernet 02:01:00:00:00:0a; fixed-address host17-interface10; }
    host host17-interface11 { hardware ethernet 02:01:00:00:00:0b; fixed-address host17-interface11; }
    host host17-interface12 { hardware ethernet 02:01:00:00:00:0c; fixed-address host17-interface12; }
  }
}