[syslinux] pxelinux tftp timeout

[Seung Kim]

Hello~~
I am a beginner of Linux. Just I installed Knoppix 5.3 on my desktop. Then I
wanted to learn about Syslinux, but I didn't know how to start to test
Syslinux. I read the Syslinux documents, but I didn't know which file needed
to open and which program I should run with syslinux file.....Please, give
me your advice. Thank you in advance.

On Wed, May 28, 2008 at 10:40 AM, David Halik <dhalik at jla.rutgers.edu>
wrote:

>
> We upgraded to 3.1.1 and the core dump is gone. Using the below code it
> works great so we're going to run with that for now.  Thanks for your
> help. We might snoop the wire later to see where the problem really is,
> but it is difficult trying to watch what's going on between the NetApp
> and pxelinux without any real OS. So... solved for now. :)
>
> David Halik wrote:
> >> Yes.
> >>
> >> Do note again that if you can make the DHCP server generate option 209,
> >> you can use that to override the default config file search sequence:
> >>
> >>
> http://syslinux.zytor.com/wiki/index.php/PXELINUX#Can_I_send_information_to_PXELINUX_via_special_options_in_the_DHCP_response.3F
> >> http://www.ietf.org/rfc/rfc5071.txt
> >>
> >>
> >>
> >
> > Great, that helps a lot. I had looked over that page but didn't realize
> > the extent to which I can customize the options. Couple of issues. Using
> > the following for a whole group results in a dhcpd core dump for me with
> > ISC 3.0. This happens when pxelinux does a dhcpdiscover:
> >
> > option space pxelinux;
> > option pxelinux.magic code 208 = string;
> > option pxelinux.configfile code 209 = text;
> >
> > site-option-space "pxelinux";
> > option pxelinux.magic f1:00:74:7e;
> > if exists dhcp-parameter-request-list {
> >     # Always send the PXELINUX options (specified in hexadecimal)
> >     option dhcp-parameter-request-list = concat(option
> > dhcp-parameter-request-list,d0,d1,d2,d3);
> > }
> >
> > option pxelinux.configfile =
> > concat("pxelinux.cfg/", binary-to-ascii(16, 8, "", leased-address));
> >
> > I tried the vendor option for a single host and it works just fine with
> > no core dump, only issue then is that binary-to-ascii gives me lower
> > case and I need upper case. It looks like there is a ucase funtion in
> > newer versions, but not in 3.0, so I think I'm going to have to upgrade
> > and see if either the core dump goes away or I can use ucase to convert
> > the hex to upper case.
> >
> > Thanks again!
> > -Dave
> >
> >
> >
> >> I would still be interested in the Wireshark trace.
> >>
> >>      -hpa
> >>
> >> _______________________________________________
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> >>
> >>
> >>
> >
> >
> >
>
>
> --
> ================================
> David Halik
> System Administrator
> OIT-CSS Rutgers University
> dhalik at jla.rutgers.edu
> ================================
>
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