Many Linux distributions include it. Many versions of PXELINUX also include gPXE. Some distributions, such as Red Hat Enterprise Linux version 5.3, include older versions of PXELINUX that do not include gPXE. In order for PXE booting to work with the builtin server in Virtualbox you need to configure your VM's network settings and boot order.
- The instructions for building the Windows Server 2012 based gPXE environment can be found from this KB article. It is important to be able to pin-point the gPXE process step where an issue occurs. Use the following list of gPXE boot loading steps to locate the exact step: PXE boot agent loads on client side; PXE client checks network link.
- Next-server 10.0.0.28; filename 'gpxe.kpxe'; I use a mikrotik switch as my DHCP server and set it like so: admin@switch /ip dhcp-server set boot-file-name=gpxe.kpxe next-server=10.0.0.28 The filename is not important, you can name it whatever you like with the kpxe extension as long as you are consistent!
- Created attachment 754643 screenshot of the host not booting Description of problem: When trying to PXE boot a VM with ROM from gpxe-rom-qemu 0.9.7 only 'no filename or root path specified' is seen. I have attached a screenshot of this, and a tcpdump of the dhcp transaction between the host and the affected VM which seems to show everything.
![Pxe but gpxe extensions not detected Pxe but gpxe extensions not detected](https://i.ytimg.com/vi/r9NySteImrQ/maxresdefault.jpg)
Linux 2.6.18, Syslinux 4.02, nasm 2.09
I've spent the past several days trying to figure out how to add a new PXE server to our environment at work. We have a corporate PXE server which I do not have access to, but I can request that a hook be put into place on the main PXE server and build my own. It seems this process is typically called PXE chaining.
Currently
![Pxe But Gpxe Extensions Not Detected Pxe But Gpxe Extensions Not Detected](http://etherboot.org/wiki/_media/screenshots/winnt_dhcp_define_gpxe_user_class.png?w=369&h=379&tok=d36e5b)
Desired
The best method of accomplishing this is with pxechain.com, which is part of the syslinux project. To set it up, you need at least version 4.04 of syslinux. Then your CORP server's /tftpboot/pxelinux.cfg/default would have an entry like this:
The issue I ran into is that the corporate PXE server is on an old version of syslinux (4.02), which has a bug in pxechain.com/pxelinux.0 that causes the machine being PXE booted to hang when pxechain.com is loaded. So pxechain.com was not an option for me as I could not upgrade syslinux on the corporate server.
The second option I came across was gpxe. Turns out it works with syslinux 4.02. To configure it:
1) Download syslinux 4.02
2) Compile (make) the package with cd syslinux-4.02 ; make
3) Go into the syslinux-4.02/gpxe
4) Modify the pxelinux.gpxe script to look like this:
Pxe But Gpxe Extensions Not Detected Done
5) Run make again in the gpxe directory. This will produce a binary called gpxelinux.0 that contains the above script embedded within it. Install gpxelinux.0 on the corporate PXE server in the /tftpboot/ directory
Pxe But Gpxe Extensions Not Detected Directly
6) Add an entry similar to this to /tftpboot/pxelinux.cfg/default:
Linux 2.6.18, Syslinux 4.02, nasm 2.09
I've spent the past several days trying to figure out how to add a new PXE server to our environment at work. We have a corporate PXE server which I do not have access to, but I can request that a hook be put into place on the main PXE server and build my own. It seems this process is typically called PXE chaining.
Currently
Desired
The best method of accomplishing this is with pxechain.com, which is part of the syslinux project. To set it up, you need at least version 4.04 of syslinux. Then your CORP server's /tftpboot/pxelinux.cfg/default would have an entry like this:
The issue I ran into is that the corporate PXE server is on an old version of syslinux (4.02), which has a bug in pxechain.com/pxelinux.0 that causes the machine being PXE booted to hang when pxechain.com is loaded. So pxechain.com was not an option for me as I could not upgrade syslinux on the corporate server.
The second option I came across was gpxe. Turns out it works with syslinux 4.02. To configure it:
1) Download syslinux 4.02
2) Compile (make) the package with cd syslinux-4.02 ; make
3) Go into the syslinux-4.02/gpxe
4) Modify the pxelinux.gpxe script to look like this:
Pxe But Gpxe Extensions Not Detected Done
5) Run make again in the gpxe directory. This will produce a binary called gpxelinux.0 that contains the above script embedded within it. Install gpxelinux.0 on the corporate PXE server in the /tftpboot/ directory
Pxe But Gpxe Extensions Not Detected Directly
6) Add an entry similar to this to /tftpboot/pxelinux.cfg/default:
The process for creating the menu entry on the QA PXE server that returns to the CORP PXE server is similar. Edit the pxelinux.gpxe script and change the IP address to 10.90.1.2. Compile and place that gpxelinux.0 on the QA PXE server in the /tftpboot/ directory.
If you need to troubleshoot pxechain.com, you need to uncomment the %define DEBUG in modules/pxechain.asm and be sure to use nasm 2.09. nasm 2.03.01 on CentOS 5.5 wouldn't compile for me. I had better luck with Debian Squeeze, which has a modern nasm.