Syslinux - Jul 2014 - iPXE chain to lpxelinux.0 6.03-pre17 inconsistencies and failures

On 07/03/2014 06:31 AM, Gene Cumm wrote:
> On Jul 2, 2014 11:13 AM, Alexander Perlis wrote:
>
>  > Or is there a different (non-ipxe?) way we can locally boot a machine
> and get it to chain to our 6.0x pxelinux server?
>
> Unless this is a completely isolated network, talk with your IT department.
>
> If there's no DHCP, make a simple server. If there's DHCP and no
boot
> info, add a PXE server that listens to DHCP requests and only offers
> boot info. If there's DHCP with boot info but no PXE, a PXE may work.
If
> there's a DHCP and PXE, you'll need to talk with the
administrators.
I'll take that as a "no". :)

I suppose we could try making an ISOLINUX CD for the local boot, which 
then uses pxechn.c32 to connect to our PXE server?

That is, perhaps the way pxechn.c32 loads and transfers control to 
lpxelinux.0 is different from the way that ipxe does it (thereby perhaps 
avoiding the hang/reboot we're seeing)?

Or is (l)pxelinux.0 sensitive to being chainloaded no matter who is 
doing the chainloading?

Alex

On Thu, Jul 3, 2014 at 9:13 PM, Alexander Perlis <aperlis at math.lsu.edu>
wrote:
> I suppose we could try making an ISOLINUX CD for the local boot, which then
> uses pxechn.c32 to connect to our PXE server?
pxechn.c32 requires a functional PXELINUX.

-- 
-Gene

On 07/03/2014 08:44 PM, Gene Cumm wrote:
> On Thu, Jul 3, 2014 at 9:13 PM, Alexander Perlis wrote:
>
>> I suppose we could try making an ISOLINUX CD for the local boot, which
then
>> uses pxechn.c32 to connect to our PXE server?
>
> pxechn.c32 requires a functional PXELINUX.
If I understand the issue correctly, is it that pxelinux.0 does not have 
a network stack and instead relies on whoever invoked it (typically the 
NIC ROM PXE code) to provide that?

But doesn't lpxelinux.0 have its own network stack? Will lpxelinux.0 do 
a DHCP to get an IP address? If yes, could one then put together an 
isolinux CD that locally loads lpxelinux.0 off the CD, then does the 
DHCP just to get an IP, and then uses pxechn.c32 to reach a particular 
server?

Alex