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the http://www.ubuntu.com/download/cloud/install-ubuntu-openstack guide asks for 3 logical private network IP address ranges:

Dynamic range — that has as many IPs as there are total NICs connected to the network
Static range — that has as many IPs as there are machines connected to the network
Floating IP range — that has as many IPs as instances that you'll have in your cloud

it is not clear to me if I need all the three ranges or just one of the three.

0

It depends on your network topology. This blog post has more details, see if it helps:

http://insights.ubuntu.com/2015/04/10/maas-network-layouts-for-the-landscape-autopilot/

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