Difference: PXEBoot (2 vs. 3)

Revision 32018-06-08 - squinney

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PXE Booting

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  iPXE also supports booting from the web. You can give it a script (e.g. http://boot.ipxe.org/demo/boot.php) which offers kernels and initrds. It can also use menus and seems more flexible and easier to configure than syslinux.
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It's worth noting what the syslinux page has to say about http support:

Older versions of PXELINUX supported HTTP by using a hybrid bootloader that also contained gPXE/iPXE, with such images named either gpxelinux.0 or ipxelinux.0.

Since version 5.10, a special PXELINUX binary, lpxelinux.0, natively supports HTTP and FTP transfers, greatly increasing load speed and allowing for standard HTTP scripts to present PXELINUX's configuration file. To use HTTP or FTP, use standard URL syntax as filename; use DHCP options to transmit a suitable URL prefix to the client, or use the "pxelinux-options" tool provided in the "utils" directory to program it directly into the lpxelinux.0 file.

While using HTTP/FTP (syntax), trying to use pxelinux.0 (i.e. without the letter "l" prefix) without iPXE/gPXE running underneath, will result in a "file not found" warning without any explanation as to the cause!

 -- Bruce Duncanedacuk - 2018-05-31

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