[syslinux] Problems with EFI PXE boot on Hp DL380p Gen9

[Geert Stappers]

On Sat, Feb 07, 2015 at 01:06:06PM -0500, Gene Cumm wrote:
> On Fri, Feb 6, 2015 at 4:57 AM, Holger Baust wrote:
> > Am 06.02.2015 um 07:44 schrieb Geert Stappers:
> >>>> On Thu, Feb 05, 2015 at 07:02:07PM +0100, Holger Baust wrote:
> >>>>> My IP is 0.0.0.0
> >>>>> Any suggestion / hint ?
> >>>> The (IMHO) missing information is the "DHCP Acknowledge"
> >>>> that should have been between package #8 and #9.
> >>>>
> >>>> Capture that missing package. It should be "visible" at the DHCP server
> >>>>
> >>> Hmm.. This might be difficult. tftpd and dhcp are on the same system.
> >>> If there was one, this should have been captured.
 <snip/>
> > Guess what the filter setting was? ;)
> >
> >  tcpdump -ni eth0.230 -s0 -w hp380g9_efi_pxe.pcap ether src c4:34:6b:b7:1b:cc or ether dst c4:34:6b:b7:1b:cc
> >
> > So the DHCPACK packet should have been captured...

But it wasn't, neither the DHCPOFFER ...



> The following has a simplification and then a specialized filter to
> grab BOOTP/DHCP frames with the MAC in question.
> 
>  (ether host c4:34:6b:b7:1b:cc) or ( ( udp port 67 or udp port 68) and (udp[36:4] = 0xc4346bb7 ) and (udp[40:2] = 0x1bcc))
> 
> Beyond this, it feels like we'll need a specialized EFI load to try
> and probe for more information.

True.  And be aware that it might show in this case also  'my IP is 0.0.0.0'

I still think the answer is the in DHCPOFFER packet.

My advice: Eliminate VLAN 230  ( eth0.230 ) from the equation.



Groeten
Geert Stappers
-- 
Leven en laten leven