PXEiSCSIboot

dhcp-match=gpxe,175
dhcp-boot=net:#gpxe,gpxe.pxe,drewserv,192.168.15.20
#dhcp-boot=menu.gpxe,drewserv,192.168.15.20
#dhcp-boot=http://192.168.15.20/drew/menu.gpxe
#dhcp-option=175,8:1:1 # keep-san
dhcp-option=17,"iscsi:192.168.15.20::::iqn.2009-11.local.drew-desktop:storage.lun1"

# chain booting
  enable-tftp
  tftp-root=/var/lib/tftpboot    # place your gpxe.pxe (either built yourself or from <link:url>http://rom-o-matic.net</link:url> here)
  dhcp-match=gpxe,175            # tags the request with net:gpxe if the gPXE option was supplied in DHCP request
  dhcp-option=175,8:1:1          # turn on the keep-san option to allow installation
  dhcp-boot=net:#gpxe,gpxe.pxe   # Here #gpxe means 'not gpxe': that is the tag is not set
  dhcp-option=net:gpxe,17,"iscsi:ta.rg.et.ip::::iqn.yyyy-mm.reversed-domain-name:identifier"

option space gpxe;
option gpxe-encap-opts code 175 = encapsulate gpxe;
option gpxe.bus-id code 177 = string;
  
group {
  host iscsihost {
    hardware ethernet 00:0c:29:01:02:03;
    fixed-address iscsihost.mydomain.org;

    if not exists gpxe.bus-id {
        filename "undionly.kpxe";
    } else {
        filename="";
        option root-path "iscsi:192.168.0.10::::iqn.1987-05.com.cisco:lvol1";
    }
  }
}