Chain grub/grub2 failed

[unknown]

Hey, hope this is not a beginner mistake.

I want to chain grub and/or grub2 for installing CentOS6 and/or CentOS7 because trying to load kernel and initrd directly from iPXE failed.

I have a script for iPXE which looks like this:

Code:

#!ipxe
chain tftp://xxx.xxx.xx.xx/centOS7/grubx64.efi

I always end up in the grub shell. My first thought was that the grub.cfg file is not loaded but I don't know how to.

Thanks for your help.


Additional Information:

Handling grubx64.efi directly from my dhcpd.conf works fine for me. So this:

Code:

class "pxeclients" {
             match if substring (option vendor-class-identifier, 0, 9) = "PXEClient";
              next-server xxx.xxx.xx.xx;
             if option architecture-type = 00:07 {
                    filename "centOS7/grubx64.efi";
              } else {
                    filename "xxxx";
              }

in dhcpd.conf works fine, but

Code:

filename "ipxe.efi";

with the script above doesn't work and ends up in the grub shell.