-${host_tag}bootfile-name,pxelinux.0
-${host_tag}server-ip-address,$faiserverip
-${host_tag}tftp-server,$faiserverip
+${host_tag}option:bootfile-name,pxelinux.0
+${host_tag}option:server-ip-address,$faiserverip
+${host_tag}option:tftp-server,$faiserverip