CentOS - Apr 2014 - PXE booting UEFI

Good Afternoon,

As per the installation guide, section 30.2.2 I?ve created an efidefault file at
/var/lib/tftpboot/pxelinux/pxelinux.cfg/efidefault

However, this file is never requested by the 64 bit PXE loader (bootx64.efi), as
shown by tcpdump:

  75 RRQ "/pxelinux/42272635-0011-5053-ACF2-82A100E615F2" octet tsize
0 blksize 512
  59 RRQ "/pxelinux/01-00-50-56-A7-BA-BF" octet tsize 0 blksize 512
  47 RRQ "/pxelinux/C13F3F6E" octet tsize 0 blksize 512
  46 RRQ "/pxelinux/C13F3F6" octet tsize 0 blksize 512
  45 RRQ "/pxelinux/C13F3F" octet tsize 0 blksize 512
  44 RRQ "/pxelinux/C13F3" octet tsize 0 blksize 512
  43 RRQ "/pxelinux/C13F" octet tsize 0 blksize 512
  42 RRQ "/pxelinux/C13" octet tsize 0 blksize 512
  41 RRQ "/pxelinux/C1" octet tsize 0 blksize 512
  40 RRQ "/pxelinux/C" octet tsize 0 blksize 512
  49 RRQ "/pxelinux/efidefault" octet tsize 0 blksize 512

I?ve worked around this by placing a separate efidefault in the root of the
pxelinux directory - however this is undesirable as this means I have to
maintain separate configs for BIOS and UEFI.

Does anyone know why this is not behaving as documented?
	
Regards,

Adam Bishop
Systems Development Specialist

  gpg: 0x6609D460
    t: +44 (0)1235 822 245
 xmpp: adamb at jabber.dev.ja.net

Janet, the UK's research and education network.


Janet(UK) is a trading name of Jisc Collections and Janet Limited, a 
not-for-profit company which is registered in England under No. 2881024 
and whose Registered Office is at Lumen House, Library Avenue,
Harwell Oxford, Didcot, Oxfordshire. OX11 0SG. VAT No. 614944238

On Mon, 14 Apr 2014, Adam Bishop wrote:
>  49 RRQ "/pxelinux/efidefault" octet tsize 0 blksize 512
>
> I?ve worked around this by placing a separate efidefault in the root 
> of the pxelinux directory - however this is undesirable as this 
> means I have to maintain separate configs for BIOS and UEFI.
>
> Does anyone know why this is not behaving as documented?
No, but I'll confirm your observation that the efidefault file won't 
be found unless it's located in the top-level tftp directory.

-- 
Paul Heinlein
heinlein at madboa.com
45?38' N, 122?6' W

IIRC the line
  49 RRQ "/pxelinux/efidefault" octet tsize 0 blksize 512
In the output below means look in
/var/lib/tftpboot//pxelinux/efidefault
Not
/var/lib/tftpboot//pxelinux/pxelinux.cfg/efidefault
i.e. it is rooted at the root of your tftpboot structure.

Even when this disclaimer is not here:
I am not a contracting officer. I do not have authority to make or modify the
terms of any contract.

> -----Original Message-----
> From: Adam Bishop [mailto:Adam.Bishop at ja.net]
> Sent: Monday, April 14, 2014 10:57 AM
> To: centos at centos.org
> Subject: [CentOS] PXE booting UEFI
> 
> Good Afternoon,
> 
> As per the installation guide, section 30.2.2 I?ve created an efidefault
file at /var/lib/tftpboot/pxelinux/pxelinux.cfg/efidefault
> 
> However, this file is never requested by the 64 bit PXE loader
(bootx64.efi), as shown by tcpdump:
> 
>   75 RRQ "/pxelinux/42272635-0011-5053-ACF2-82A100E615F2" octet
tsize 0 blksize 512
>   59 RRQ "/pxelinux/01-00-50-56-A7-BA-BF" octet tsize 0 blksize
512
>   47 RRQ "/pxelinux/C13F3F6E" octet tsize 0 blksize 512
>   46 RRQ "/pxelinux/C13F3F6" octet tsize 0 blksize 512
>   45 RRQ "/pxelinux/C13F3F" octet tsize 0 blksize 512
>   44 RRQ "/pxelinux/C13F3" octet tsize 0 blksize 512
>   43 RRQ "/pxelinux/C13F" octet tsize 0 blksize 512
>   42 RRQ "/pxelinux/C13" octet tsize 0 blksize 512
>   41 RRQ "/pxelinux/C1" octet tsize 0 blksize 512
>   40 RRQ "/pxelinux/C" octet tsize 0 blksize 512
>   49 RRQ "/pxelinux/efidefault" octet tsize 0 blksize 512
> 
> I?ve worked around this by placing a separate efidefault in the root of the
pxelinux directory - however this is undesirable as this
> means I have to maintain separate configs for BIOS and UEFI.
> 
> Does anyone know why this is not behaving as documented?
> 
> Regards,
> 
> Adam Bishop
> Systems Development Specialist
> 
>   gpg: 0x6609D460
>     t: +44 (0)1235 822 245
>  xmpp: adamb at jabber.dev.ja.net
> 
> Janet, the UK's research and education network.
> 
> 
> Janet(UK) is a trading name of Jisc Collections and Janet Limited, a
> not-for-profit company which is registered in England under No. 2881024
> and whose Registered Office is at Lumen House, Library Avenue,
> Harwell Oxford, Didcot, Oxfordshire. OX11 0SG. VAT No. 614944238
>