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Neutron for Dummies

I have installed Openstack Ocata on a pair of machines that each have two NICs. My local network is 10.0.1.0/24, and I've used that network for the management interfaces of the stack (controller is .111 and compute1 is .131).

I used option 1 from the openstack ubuntu install guide for Ocata

I can use horizon to launch vm's on the compute node, and all appears kosher therein, but I can't access these instances over the network from my workstation (or from the controller node).

I've tried making a subnet within 10.0.1.0 on which to place my instances, but I don't have a deep understanding of networking so I'm looking for either a hint as to what important step I might be missing, or a howto that gets me all the way to connectivity. It's also possible that I'm missing some key piece like a programmable router. If that's the case I'd like to know that, too. TIA, Tom