[syslinux] pxelinux 4.03 taking forever to find ..../pxelinux.cfg/default

[Geert Stappers]

Op 20101116 om 07:16 schreef Gene Cumm:
> On Tue, Nov 16, 2010 at 06:08, Doug Scoular <dscoular at gmail.com> wrote:
> > Hi,
> > Is there anything that controls the speed with which pxelinux.0 (4.03)
> > enumerates the files in .../pxelinux.cfg before it reaches the
> > .../pxelinux.cfg/default file ?
> >
> >    pxelinux.cfg/01-00-50-56-ba-48-0e
> >    pxelinux.cfg/AC12B2D9
> >    pxelinux.cfg/AC12B2D
> >    pxelinux.cfg/AC12B2
> >    pxelinux.cfg/AC12B
> >    pxelinux.cfg/AC12
> >    pxelinux.cfg/AC1
> >    pxelinux.cfg/AC
> >    pxelinux.cfg/A
> >    pxelinux.cfg/default
> >
> > It's taking several minutes before moving on to the next file... any
> > thoughts on why this would be ?
> 
> Probably timeouts.  If your TFTPD is not returning a file not found
> (OpCode: Error Code (5); Error Code: File not found (1)), that could
> cause PXELINUX to wait for the TFTP timeout before attempting the next
> file.  I think the default TFTP timeout in PXELINUX is 60 seconds.
> Try a packet capture and watch the interactions of your TFTPD and
> PXELINUX client.  You should see a client read request followed by a
> daemon file not found.

The thing I would like to know is, if the TFTP server is able
to do a succesfull reverse lookup of the IP adress of the client.

I think that the delay is caused by a incomplete configured DNS,
Domain Name Server.
 

Groeten
Geert Stappers