vendor-encapsulated-options

Tue Nov 14 10:52:00 UTC 2006

Hi,
i have a network with installed w2003 RIS server, and
i have some hosts which i want to boot from linux remote boot server.
All of them have a realtek8139 PCI network cards with intel PXE-2.1
in documentation for pxelinux.0 i found some trick with
"vendor-encapsulated-options" option of DHCP server,
this option working fine with intel PXE version 2.0,
but do not work with realtek.
Does anyone know the vendor-encapsulated-options value
for PXE version greater than 2.0?