====== Open vSwitch ======
  * http://git.openvswitch.org/cgi-bin/gitweb.cgi?p=openvswitch;a=blob_plain;f=tutorial/Tutorial;hb=HEAD
    * download OVS source
    * ./configure; make sandbox
    * Follow the tutorial: create flow tables...

===== Overlay wiht OVS =====
  * Openstack networks terminologies 
    * http://fosskb.wordpress.com/2014/06/10/managing-openstack-internaldataexternal-network-in-one-interface/ 
    * http://fosskb.wordpress.com/2014/06/19/l2-connectivity-in-openstack-using-openvswitch-mechanism-driver/
  * http://networkstatic.net/setting-overlays-open-vswitch/
  * http://networkstatic.net/opendaylight-openstack-integration-devstack-fedora-20/
  * http://benpfaff.org/~blp/ovs-fields.pdf


====== Open vSwitch & Neutron ======
  * http://networkstatic.net/openflow-starter-tutorial-lab-1/


====== Open vSwitch & ODL ======
  * http://plvision.eu/blog/openstack-icehouse-networking-key-points/
  * http://plvision.eu/blog/opendaylight-clustering-made-easier-with-ovsdb-protocol/

Open vSwitch can be configured to communicate with one or more external OpenFlow controllers. The IP address and TCP port of a target controller can be specified as follows:

    ovs-vsctl set-controller <BRIDGE>
    tcp:$CONTROLLER_ADDRESS:$CONTROLLER_PORT

In order to assign multiple controllers to the Open vSwitch, you just need to specify all necessary controller addresses and ports in the same command:

    ovs-vsctl set-controller <BRIDGE>
    tcp:$CONTROLLER_ADDRESS1:$CONTROLLER_PORT1 \
    tcp:$CONTROLLER_ADDRESS2:$CONTROLLER_PORT2 \
    tcp:$CONTROLLER_ADDRESS3:$CONTROLLER_PORT3 \
    tcp:$CONTROLLER_ADDRESS4:$CONTROLLER_PORT4 ...

NOTE: Do not use separate commands for assigning multiple controllers, as the last command overwrites the previous controller configuration.