Comment 7 for bug 1301015

ifdown/ifup requires that every interface be detected before hand and restarted individually on multi-homed hosts and hypervisors.

For hypervisors in a cloud environment this includes virtual bridges as well. The init script method available till this release of the OS allowed restarting all interfaces and bridges on any host via a single command remotely. With this change, now each machine may need a different network shutdown/startup/restart process unique to its particular configuration.