I was eventually able to solve that problem by using net.ifnames=0 on the kernel boot
command line during the installation of CentOS or the oVirt Node image, to avoid injecting
non-portable machine specific network names and configurations in the overlay network.
Unfortunately this won't work on more production type environments with bonded pairs
of purpose segregated NICs.
But even then I'd go as far as recommending going with ethX and hand-tuning the
/etc/sysconfig/network-scripts in case of potential hardware replacements, rather than
trying to correct the wiring in the overlay network while a gluster node is down. At least
with the current documentation.