[Dnsmasq-discuss] proxy dhcp does not send dhcp-options

Jochen Dekeyser jochen.dekeyser at gmail.com
Tue Apr 10 19:37:24 BST 2012

Op 10 apr. 2012 11:41 schreef "Simon Kelley" <simon at thekelleys.org.uk> het

> On 10/04/12 10:15, Jochen Dekeyser wrote:
>> I looked into the pxespec.pdf and the RFC's 2131 and 2132. If I get
>> this right, theoretically, it is possible, but it probably has never
>> been implemented?
>> So, I will be looking for other solutions :-).
> It's tricky. Most systems which PXE-boot do so in two phases. First the
> PXE ROM does it's stuff which includes getting a DHCP lease and all the PXE
> information. The PXE ROM then downloads a boot loader (ie PXELinux) which
> has access to the IP address and any other information the PXE subsystem
> gets. The bootloader then downloads and runs the Linux kernel and the
> system starts. It then does DHCP _again_, using the normal Linux DHCP
> client.
> The first stage could conceivably use information from the proxy server,
> but I don't know of any Linux DHCP clients that will even try and talk to a
> PXE-proxy. Since the stuff you're sending looks like it's needed for the
> running system, using a DHCP-proxy is a non-starter.
> An alternative solution looks good :-)
> Cheers,
> Simon.
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