[syslinux] PXELINUX gets stuck when receiving non-PXE traffic

[H. Peter Anvin]

On 7/18/19 6:18 PM, H. Peter Anvin wrote:
> 
> Hi,
> 
> lpxelinux.0 interacts with the network ROM in a completely different way than
> pxelinux.0.  In general, the method used by pxelinux.0 is likely to be *far*
> more reliable given the crazy variety of PXE ROMs out there; however, it can
> inherently only use UDP and therefore only supports TFTP. For that reason, I
> strongly recommend that people use lpxelinux.0 only if you intend to boot from
> a non-TFTP protocol (i.e. HTTP or FTP.)
> 

That being said, I have to say I'm surprised that iPXE would have that problem
(seeing that it apparently uses iPXE as its PXE ROM.)

[Michael: this is with regards to this system:
https://pcengines.ch/apu2c4.htm; it apparently fails with syslinux in UNDI
mode (lpxelinux.0).]

	-hpa