[syslinux] Windows Server DHCP + UEFI recipe

[Alexandre Blanchette]

A small how-to for encapsulating option 210 inside option 43 on Windows
DHCP servers would be welcome then :-)

And as far as UEFI x86 system go, one would simply have to create another
vendor class with the value PXEClient:Arch:00006



On Wed, Jan 15, 2014 at 12:05 AM, Gene Cumm <gene.cumm at gmail.com> wrote:

> On Tue, Jan 14, 2014 at 8:52 PM, Alexandre Blanchette
> <blanalex at gmail.com> wrote:
> > I've found a way to support PXE booting both UEFI and BIOS architectures
> > with Windows Server DHCP.
> >
> > This method uses a feature introduced in WinServer 2012: DHCP policies.
> >
> > First, in the the DHCP console, at the IPv4 root of the server, create a
> > vendor class named PXEClient (UEFI x64) with the following value:
> > PXEClient:Arch:00007
> >
> > Then create your configuration for your BIOS clients in your scope or as
> > global settings as usual by setting options 66 (IP or hostname of your
> TFTP
> > host) and 67 (pxelinux.0).
> >
> > For the UEFI clients, you must then create a policy. In the condition
> page
> > of the wizard, add a condition with the following settings:
> > Criteria: Vendor Class
> > Operator: Equals
> > Value: PXEClient (UEFI x64)
> > Tick Append wildcard(*)
> >
> > Do not configure an IP address range for the policy.
> >
> > Finally configure options 66 (TFTP server) and 67 (syslinux.efi). You
> must
> > separate TFTP servers for your BIOS and UEFI clients because Microsoft
> DHCP
> > server does not send option 210 (path prefix).  Microsoft DHCP servers
> will
> > only send options listed in the Parameter Request List in the
> DHCPDISCOVER
> > packet.
> >
> > One could make a cleaner setup by creating a BIOS PXEClient vendor class
> > and putting their options within a policy too.
>
> I haven't tried WS2012 yet but PXELINUX will parse DHCP option 43
> (vendor-specific information) nicely and I have encapsulated 210
> inside 43 successfully (can't recall if I tried WS2008R2 and/or
> ISC-DHCPd but I did at least one).
>
> The one oddball missing from your recipe is the UEFI x86 systems that
> are not 64 bit.  They are rare but exist.
>
> --
> -Gene
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-- 
Alexandre Blanchette <blanalex at gmail.com>