FAQ
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

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  • Paul Heinlein at Apr 14, 2014 at 4:01 pm

    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
  • Denniston, Todd A CIV NAVSURFWARCENDIV Crane at Apr 16, 2014 at 1:43 pm
    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

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