https://github.com/ionosphere80/openstack-networking-guide/blob/master/scenario-dvr/scenario-dvr.md
   -> Gibts leider nicht mehr. War die entscheidende Quelle...
   -> Wahrscheinlich entspricht dem diese neue Seite:
      http://docs.openstack.org/networking-guide/deploy_scenario2.html
http://docs.openstack.org/networking-guide/content/ha-dvr.html
schmaustech.blogspot.de
blog.gampel.net/2014/12/openstack-neutron-distributed-virtual.html
blog.gampel.net/2014/12/openstack-dvr2-floating-ips.html
blog.gampel.net/2015/openstack-DVR-SNAT.html


Controller:
  /etc/neutron/neutron.conf
        [DEFAULT]
        router_distributed = True
        dvr_base_mac = fa:16:3f:00:00:00

  /etc/neutron/plugins/ml2/ml2_conf.ini
        [ml2]
        type_drivers = flat,vxlan
        tenant_network_types = vxlan
        mechanism_drivers = openvswitch,l2population    

Network:
  /etc/neutron/neutron.conf
        [DEFAULT]
        router_distributed = True
        dvr_base_mac = fa:16:3f:00:00:00


  /etc/neutron/plugins/ml2/ml2_conf.ini
        [ml2]
        type_drivers = flat,vxlan
        tenant_network_types = vxlan
        mechanism_drivers = openvswitch,l2population

        [agent]
        enable_distributed_routing = True
        l2_population = True
        arp_responder = True

  /etc/neutron/l3_agent.ini
        [DEFAULT]
        router_delete_namespaces = True
        agent_mode = dvr_snat

Compute Nodes:
  /etc/neutron/neutron.conf
        [DEFAULT]
        router_distributed = True

  /etc/neutron/plugins/ml2/ml2_conf.ini
        [ml2]
        mechanism_drivers = openvswitch,l2population

        [agent]
        l2population = True
        tunnel_types = vxlan
        enable_distributed_routing = True
        arp_responder = True

  /etc/neutron/l3_agent.ini
        [DEFAULT]
        interface_driver = neutron.agent.linux.interface.OVSInterfaceDriver
        use_namespaces = True
        router_delete_namespaces = True
        external_network_bridge = br-ex
        agent_mode = dvr