Hi,
I decided to get rid of redundant dhcp query that happened when
autobooting after fetching undionly.kkpxe image. And I'd like to share
some thoughts.
1. I couldn't find the needed option on: http://ipxe.org/howto/dhcpd
(maybe this doc page concerns a stable version, not top of the git tree)
I've found in dhcp.h that the needed option is DHCP_EB_USE_CACHED that
means 0xb2 or 178 decimal.
So, it could be added to the doc page like this (together with
scriptlet option):
option ipxe.cached-dhcp code 178 = unsigned integer 8;
option ipxe.scriptlet code 81 = string;
2. My plan was to download undionly.kkpxe using the legacy PXE client
and then after iPXE start - run the scriptlet with instruction to
chainload some image with http. Unfortunately I ran into infinite loop,
as cached dhcp data contained "filename" field - it caused iPXE to
download kkpxe image again and again and again..
I coped with this the following way:
I've compiled iPXE image with embedded script like this:
#!ipxe
dhcp
chain ${scriptlet}
and dhcpd configuration like:
filename "iPXE/VER/undionly.kkpxe";
option ipxe.cached-dhcp 1;
option ipxe.scriptlet "http://bootserver/bootpath/pxeboot.cgi";;
I did work, but it's a kind of hack. Maybe dhcp command run from cached
dhcp settings should not fetch the filename? Or some adjustment in
main.c should be done?
Best regards,
Jedrzej Kalinowski
--
JK
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