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+.. OPNFV - Open Platform for Network Function Virtualization
+.. This work is licensed under a Creative Commons Attribution 4.0
+.. International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+Scenario: "OpenStack - ovs-nfv"
+=============================
+
+Scenario: apex-os-odl_l3-ovs-ha
+
+"apex-os-odl_l3-ovs-ha" is a scenario developed as part of the OVS for NFV
+OPNFV project. The main components of the "apex-os-odl_l3-ovs-ha" scenario
+are:
+
+ - APEX (TripleO) installer (please also see APEX installer documentation)
+ - Openstack (in HA configuration)
+ - OVS/DPDK Open vSwitch with DPDK data plane virtual forwarder for tenant networking
+ - ODL Open Daylight service running on a single controller
+ - One or more compute hosts or nodes
+
+Introduction
+============
+
+NFV and virtualized high performance applications, such as video processing,
+require Open vSwitch to be accelerated with a fast data plane solution that provides both
+carrier grade forwarding performance, scalability and open extensibility.
+
+A key component of any NFV solution is the virtual forwarder, which should consist of
+soft switch that includes an accelerated data plane component. For this, any virtual
+switch should make use of
+hardware accelerators and optimized cache operation to be run in user space.
+
+The apex-os-odl_l3-ovs-ha scenario provides
+use-cases for deployment of NFV nodes instantiated by
+an Openstack orchestration system on OVS/DPDK enabled compute nodes
+with Open Daylight controller service.
+
+A deployment of the "apex-os-odl_l3-ovs-ha" scenario consists of 3 or more
+servers:
+
+  * 1 Jumphost hosting the APEX installer - running the Undercloud
+  * 1 Controlhost, which runs the Overcloud, Openstack services,
+  and Open Daylight service.
+  * 1 or more Computehosts or nodes
+
+.. image:: ovs4nfv.png
+
+Tenant networking leverages Open vSwitch accelerated with a fast user space data path such
+as DPDK.
+Open VSwitch (OVS) with the Linux kernel module data path is used for all other
+connectivity, such as connectivity to public networking "the
+Internet" (i.e. br-ex) is performed via non-accelerated OVS with Linux kernel data path.
+
+Features of the scenario
+------------------------
+
+Main features of the "apex-os-ovs-nosdn-ha" scenario:
+
+  * Automated installation using the APEX installer
+  * Accelerated tenant networking using OVS/DPDK as the forwarder
+  * VXLAN l3 tenant network support with accelerated DPDK ports.
+
+Networking in this scenario using OVS with accelerated User space IO.
+---------------------------------------------------------------------
+
+The apex-os-odl_l3-ovs-ha scenario combines components from three open
+source projects: OpenStack, Open vSwitch and DPDK. To make accelerated networking
+available for this scenario Open vSwitch is bound via its netdev interface
+with DPDK user space accelerated capability.
+
+Scenario Configuration
+======================
+
+Simply deploy this scenario by using the os-odl_l3-ovs-ha.yaml deploy
+settings file.
+
+Validated deployment environments
+=================================
+
+The "os-odl_l3-ovs-ha" scenario has been deployed and tested
+on the following sets of hardware:
+ * virtual deployments only
+ * Not yet validated on UCS hardware
+
+
+Limitations, Issues and Workarounds
+===================================
+
+* _APEX-415 br-phy dpdk interfaces are not brought up by os-net-config
+
+References
+==========
+
+
+  * OVS for NFV OPNFV project wiki: https://wiki.opnfv.org/display/ovsnfv
+  * Open vSwitch: http://openvswitch.org/
+  * DPDK: http://dpdk.org
+  * OPNFV Danube release - more information: http://www.opnfv.org/colorado