title: Unable to establish connection to http://controller:9696/v2.0/networks
body: <p>I'm setting up openstack infrastructure, composed from controller and compute nodes.</p>
  <p>I followed the process of setting sub-services as of USSURI version: keystone, glance, placement. See <a href="https://docs.openstack.org/install-guide/openstack-services.html" rel="nofollow noreferrer">article</a></p>
  <p>When I came to neutron service, I started with setup of components hosted in controller node with option 1 (network provider) so I followed these 3 articles respectively : <a href="https://docs.openstack.org/neutron/ussuri/install/controller-install-ubuntu.html" rel="nofollow noreferrer">process 1/3</a>  -  <a href="https://docs.openstack.org/neutron/ussuri/install/controller-install-option1-ubuntu.html" rel="nofollow noreferrer">process 2/3</a>  -  <a href="https://docs.openstack.org/install-guide/launch-instance-networks-provider.html" rel="nofollow noreferrer">process 3/3</a></p>
  <p>When I go to creating a network (process 3/3), I receive this error message :</p>
  <pre><code>$openstack network create --project-domain Default --project service --share --external --provider-physical-network provider --provider-network-type flat --enable provider
  
  Unable to establish connection to http://controller:9696/v2.0/networks: HTTPConnectionPool(host='controller', port=9696): Max retries exceeded with url: /v2.0/networks (Caused by NewConnectionError('&lt;urllib3.connection.HTTPConnection object at 0x7fd0a7c13630&gt;: Failed to establish a new connection: [Errno 111] Connection refused',))
  </code></pre>
  <p>Waiting for help please.</p>
  <hr />
  <p><strong>If the question helped, up-vote it. Thanks in advance.</strong></p>