Syslinux - Dec 2007 - Passing option-209 to PXE client w/ ISC DHCPD V2

Does anyone remember if there is a way to coerce the ISC DHCPD version
2 (2.0pl5) to send options to a PXE client that does not explicitly
request them.  I can do this in version 3 of DHCPD via the
vendor-option-space mechanism, but this is not available in version 2
of the server (the version my network switch uses).

I want to be able to specify the PXE filename via option 209 (plus
option 208 to enable it).  I know how to set the option (option
option-209 "myfile";), but the server will not return these parameters
to the PXE client as they are not specifically requested.

I know it's really a question for the ISC folks, but I thought I'd ask
here as well.

Craig

Craig

You have to rewrite the dhcp-parameter-request-list


 if exists dhcp-parameter-request-list {
                append dhcp-parameter-request-list 208,209;
        }



or in this form ( i don't remember well )

if exists dhcp-parameter-request-list {
    option dhcp-parameter-request-list = concat(option
    dhcp-parameter-request-list,d0,d1);
        }

Ps : however in the second form the 208 , 209 must be rewrited in 
hexadecimal form : d0 and d1


I hope will help you

regards
Stephane


Craig Johnston wrote:
> Does anyone remember if there is a way to coerce the ISC DHCPD version
> 2 (2.0pl5) to send options to a PXE client that does not explicitly
> request them.  I can do this in version 3 of DHCPD via the
> vendor-option-space mechanism, but this is not available in version 2
> of the server (the version my network switch uses).
>
> I want to be able to specify the PXE filename via option 209 (plus
> option 208 to enable it).  I know how to set the option (option
> option-209 "myfile";), but the server will not return these
parameters
> to the PXE client as they are not specifically requested.
>
> I know it's really a question for the ISC folks, but I thought I'd
ask
> here as well.
>
> Craig
>
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