Test version:
rhev-hypervisor7-7.1-20150312.0.iso
ovirt-node-3.2.1-10.el7.noarch
Test steps:
1.BOOTIF=em1 storage_init=/dev/sda management_server=$RHEV-M_IP firstboot
Test result:
Register to rhevm3.5 success when auto install rhevh7.1 with "management_server=$RHEV-M_IP" parameter.
Still failed with "BOOTIF=$MACAddress storage_init=/dev/sda management_server=$RHEV-M_IP firstboot",
since dougsland has report a new bug 1200207 to track using "BOOTIF=$MACAddress" issue.
so verified this bug on "BOOTIF=em1 storage_init=/dev/sda management_server=$RHEV-M_IP firstboot" parameters.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHBA-2015-0903.html