Can not boot RHEL 7.3 by using iPXE

Hi,

I am trying to boot RHEL 7.3 by using iPXE (0c8d16 and fd95c).
The hardware is HP ProLiant DL360 Gen9.
However, Linux kernel does not start up after downloading initrd and vmlinuz.
It looks like downloading initrd and vmlinuz was completed.

- Screenshot: https://www.dropbox.com/s/73edzv79jhul5o...enshot.png
- dhcpd.conf: https://www.dropbox.com/s/yhpfvlotq06g5d3/dhcpd.conf
- boot.ipxe: https://www.dropbox.com/s/of0e31md6zhbubx/boot.ipxe

I can boot vmlinuz of RHEL 7.1 with initrd of RHEL 7.3.
Therefore, I think the cause of this is vmlinuz of RHEL 7.3.

Can anyone boot RHEL/CentOS 7.3 by using iPXE?

Sorry for my poor English...