DhcpOptions

You can also set the IMAGESERVER in the pxelinux configuration file as option, see:

• IMAGESERVER option

An alternative is to set IMAGESERVER via a dhcp option. Just like SystemImager, Sali also uses dhcp options for setting variables. But Sali uses a different range. According to ​networksorcey.com range 224-254 is for private use. So ideal for Sali. The table below shows the current used DhcpOptions by Sali.

code	code hex	name	type	param	patched
224	e0	saliimgsrv	ip-adress	$IMAGESERVER	yes

To use our dhcp options with udhcpc a patch must be applied to the busybox source.

ISC DHCP server configuration

Add these lines to dhcpd.conf to support the new SALI image server dhcp option:

## Support for the SALI and the 'old' imageserver settings
#
option option-140 code 140 = text;
option sali-imgsrv code 224 = ip-address;


# Admin network
#
subnet 192.168.144.0 netmask 255.255.255.0 {

  ##  option-140 is the IP address of your SystemImager server
  #    sali-imgsrv is the new setting for the Systemimager server
  #
  option sali-imgsrv 192.168.146.10;
  option option-140 "192.168.146.10";
  next-server 192.168.146.10;

....
}