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

Simon Kelley simon at thekelleys.org.uk
Mon Apr 9 17:05:09 BST 2012

On 09/04/12 16:42, Jochen Dekeyser wrote:
> Hi,
> I want to use dnsmasq as a proxy dhcp at an other
> (windows) dhcp-server is active on the network, and a want to use
> dnsmasq to send only the pxe-boot options for pxe-clients. I use the
> following config-file:
> listen-address=
> port=0
> log-dhcp
> dhcp-boot=/ltsp/i386/pxelinux.0
> dhcp-option=3,
> dhcp-option=6,
> dhcp-option=15,"ltsp"
> dhcp-option=17,""
> pxe-prompt="Press F8 for boot menu", 3
> pxe-service=X86PC, "Boot from network", /ltsp/i386/pxelinux
> pxe-service=X86PC, "Boot from local hard disk", 0
> dhcp-range=,proxy
> dnsmasq does not want to send the dhcp-options to the pxe-clients... I
> did check this in the logs and with Wireshark. When a use dnsmasq as
> full dhcp-server (with dhcp-range=,,8h instead
> of dhcp-range=,proxy), it does send these dhcp-options...
> What am I doing wrong?

The problem might be that the option numbers in question are not being 
requested by the client. This is easy to fix by using dhcp-option-force 
intsead of dhcp-option, so  that options are sent anyway.



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