Comment 2 for bug 1361194

The guide says about reference network topology, described here: http://docs.openstack.org/icehouse/install-guide/install/apt/content/neutron-initial-networks.html

There is 'ext-net' and 'ext-subnet', but the is no information about how to conigure ml2 to get traffic to 'external physical network'.

This is a problem - there is no way in _ANY_ configuration with real network that this guide will works.