Neutron with existing external network - RDOMany people have asked how to use packstack --allinone with an existing external network. This method should allow any machine on the network to be able to access launched instances via their floating IPs. Also, at the end of this message, there are some ideas for making this process better that I thought we could discuss. These instructions have been tested on a RHEL 6.4 "minimal" install VM atta
