My present ISC DHCP configuration at home including iPXE chainloading for SmartOS.

dhcpd.conf

authoritative;
ddns-update-style none;
option domain-name "alainodea.local";
option domain-name-servers 208.67.222.222, 208.67.220.220;
default-lease-time 600;
max-lease-time 7200;
log-facility local7;

subnet 192.168.2.0 netmask 255.255.255.0 {
  range 192.168.2.10 192.168.2.60;
  option routers 192.168.2.1;
  deny unknown-clients;
}

group {
  host appletv {
    hardware ethernet 58:55:ca:1d:10:bd;
    fixed-address 192.168.2.10;
  }

  host wii {
    hardware ethernet 00:17:ab:42:b0:12;
    fixed-address 192.168.2.11;
  }

  host ps3 {
    hardware ethernet 00:1f:a7:9a:52:6f;
    fixed-address 192.168.2.12;
  }

  host fibreop-tv {
    hardware ethernet 00:23:ed:4e:0d:5a;
    fixed-address 192.168.2.13;
  }

  host claudia-imac {
    hardware ethernet 00:1f:f3:46:10:6f;
    fixed-address 192.168.2.14;
  }

  host alain-ubuntu {
    hardware ethernet f4:6d:04:39:af:eb;
    fixed-address 192.168.2.15;
  }

  host claudia-iphone {
    hardware ethernet b4:f0:ab:7c:53:81;
    fixed-address 192.168.2.16;
  }

  host alain-iphone {
    hardware ethernet b4:f0:ab:07:79:93;
    fixed-address 192.168.2.17;
  }

  host alain-ipad {
    hardware ethernet 1c:ab:a7:c2:5a:df;
    fixed-address 192.168.2.18;
  }

  host claudia-ipad {
    hardware ethernet b8:c7:5d:ea:e0:36;
    fixed-address 192.168.2.19;
  }
}

group {
  next-server 192.168.2.2;
  if exists user-class and option user-class = "iPXE" {
    filename = "smartos.ipxe";
  } else {
    filename = "undionly.kpxe";
  }

  host top-t3500 {
    hardware ethernet b8:ac:6f:8f:3e:1b;
    fixed-address 192.168.2.60;
  }

  host bottom-t3500 {
    hardware ethernet 00:24:e8:3b:08:6c;
    fixed-address 192.168.2.61;
  }
}