Fedora Core 17 network interface names set weirdly, won't reset via documentation

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http://serverfault.com – An interface was added to this Fedora Core 17 system long after installation and it got a weird name and it's driving me insane. A new naming convention was introduced in FC 15. The official rules for changing its name are described here: RedHat Consistent Network Device Naming Notes However, MY system doesn't appear to follow the rules! In particular, this file does not exist: /etc/udev/rules.d/70-persistent-net.rules Further, following reboot, the new name is not visible. I suspect this may be the root cause of my troubles here server-fault question on IPTABLES routing / forwarding issue a (HowTos)