Cloned VMWare/RedHat 7.2 HW MAC issue

[DavidBM new to Linux]

Hi,

Can someone help me here. I have cloned a VMWare ESX server (runs on
RH 7.2) and am experiencing an issue with MS DHCP. The issue is that
both servers are getting the same reserved IP address from DHCP.

If I do an IFCONFIG command on both servers I get different MAC
addresses for each server (which is what I expected), both server eth0
scripts are set to DHCP.

I've tried overriding the MAC address on the cloned server using
IFCONFIG eth0 HW ETHER etc and the results of IFCONFIG change
accordingly. But I still pick up the same reserved address.

As an experiment I switched off the master, deleted the reservation in
DHCP and downed and up'd eth0 on the clone. It then picked up a new
DHCP address. Yahooo I thought, problem solved, however the unique
identifier in DHCP registered by the clone was the MAC address of the
master server and not the HW MAC reported by IFCONFIG on the clone
itself!!!

I'm new to Linux so can anyone please tell me if there is a config
file or option I have missed or need to look at.

Any help greatly appreciated.

Thanks.