I have some problem by using XEN kernel on Centos 5.x. I've tried to make XEN based vms on three of my dedis in a german DC and each time after the Xen kernel was installed, the mac address of eth0 has been changed to FE:FF:FF.FF.FF.FF and after reboot the server couldn't be reached via SSH. I found out this via KVM and manually reset the mac-address to the original. The question is how can I prevent this from happening without the help of KVM? Any help will be much appreciated