✎ wiki:qemupxe - Etherboot/gPXE Wiki

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====== How to use qemu with pxe? ======

you can refer the wiki page [[http://www.etherboot.org/wiki/doku.php|official wiki]] for more details.
This page contains my experiences.

===== qemu with tftp =====

**boot qemu PXE with tftp protocol**:\\
To make my life simple, I downloaded following files into directory ///home/myname/pxe///
  - [[http://etherboot.org/gtest/gtest.gpxe]]
  - [[http://etherboot.org/gtest/bz2bzImage]]
  - [[http://etherboot.org/gtest/initrd.bz2]]

Then I modified the **gtest.gpxe** to use //tftp// instead of //http//.\\
Edited contents of my **gtest.gpxe** are as follows
<code>
#!gpxe
kernel tftp://10.0.0.88//bz2bzImage root=100
initrd tftp://10.0.0.88//initrd.bz2
boot
</code>

Then I used qemu with bootp to boot with tftp in following way.
<code>
qemu -bootp tftp://10.0.0.88//gtest.gpxe -tftp /home/myname/pxe/ -fda gpxe.dsk
</code>

The IP address used here //10.0.0.88// can be anything, It's not the IP address of my machine.
As long as you use the same IP address in qemu command and in **gtest.gpxe** file, it should work.

==== How it works? ====
Here I am not running any //tftp// server on my machine. qemu will do most of the work for us.
  - Firstly, it will simulate the //dhcpd// server and return the 10.0.0.88 IP address to the booting pxe.
  - Next, It will simulate //tftp// server, with root directory at ///home/myname/pxe/// and provides files from that location to the pxe.
  - pxe assumes that it is talking to //tftp// server and its request for file

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