Syslinux - Jul 2002 - ISC DHCPD Problem and Solution.

Hi,

I already solved this problem, I offer this a part of the FAQ or as a starting 
point for an FAQ addition
I was using the RH pxe support, but I got tired of pressing F8.
I wanted to make a few machines to auto boot without any intervetion, well 
that's what dhcp/bootp/pxe is all about right?

I followed the HOWTO on the pxelinux site.
I desperately upgraded to the latest  ISC 3.1p9.

The problem popped up when I inserted:
  if exists dhcp-parameter-request-list { 
    append dhcp-parameter-request-list 208, 209, 210, 211;
  }

All the station in that group suddenly did not receive the net mask, routers, 
DNS server and domain option.
It seems that only IP and the above options where transfered.
I googled for a solution, but nothing, like I was the only one with this 
problem ( may be I am?).
Finally I decide to forcibly make the PXE "eat" this parameters.
I read the RFC ( http://www.faqs.org/rfcs/rfc2132.html ).
I found the required options and changed the line to read:
   if exists dhcp-parameter-request-list {
                # Always send the PXELINUX options, we need to insist on
                # 1=net mask 3=routers 6=domain name server 15=local domain
                # name
                append dhcp-parameter-request-list 1, 3, 6, 15, 208, 209, 210, 
211;
        }
And it is working.

Just my 2c.

Bye
Gal

Gal Goldschmidt wrote:
> 
> All the station in that group suddenly did not receive the net mask,
routers,
> DNS server and domain option.
 >

Interesting.  That either implies a bug in DHCPD 3.1p9, or some really 
funky packets sent by your host.  It's extremely odd that it works 
without it...

Could you send me a packet trace (tcpdump -w) of the negotiation of one 
of these hosts with and without this option?

	-hpa