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+..
+ This work is licensed under a Creative Commons Attribution 3.0 Unported
+ License.
+
+ http://creativecommons.org/licenses/by/3.0/legalcode
+
+===================================================
+ML2 Mechanism Driver for embedded switch SR-IOV NIC
+===================================================
+
+Launchpad blueprint:
+
+https://blueprints.launchpad.net/neutron/+spec/ml2-sriov-nic-switch
+
+This blueprint is to add ML2 Mechanism Driver for SR-IOV capable NIC based
+switching (HW VEB), such as Mellanox ConnectX Family.
+
+
+Problem description
+===================
+
+SR-IOV capable NIC, such as Mellanox ConnectX Family cards, provide
+embedded switching capability. As part of the both nova and neutron
+enchacements to support SR-IOV ports, the mechanism driver proposed
+by this blueprinht will initially support VLAN network type.
+Nova VIF Driver will take care of setting VLAN ID via libvirt network
+interface XML.
+The mechanism driver will require L2 agent to make run time networking
+setting updates on SR-IOV ports.
+
+Proposed change
+===============
+
+The Ml2 mechanism driver will be based on Simple Agent Mechanism Driver.
+The Ml2 mechanism driver will be capable to bind ports that match supported
+criteria listed below.
+It will support DIRECT and MACVTAP vnic types.
+It will support PCI VENDOR INFO initially matching Mellanox ConnectX Family.
+There will be an option to load the list of supported PCI VENDOR INFO
+from configuration file.
+The mechanism driver will include vlan_id attribute in port vif_details
+dictionary to provide nova vif driver with vlan id details.
+The mechanism driver will expect to get port binding:profile populated with
+physical_network and pci_vendor_info to identify if should bind the port and
+on which physical network to bind.
+To support L2 agent rpc calls, _device_to_port_id method of ml2 rpc module
+should be modified to service devices that are not prefixed by tap.
+
+Alternatives
+------------
+
+An alternative solution would be to develop a monolithic plugin.
+Since SR-IOV resources are limited and support less flexible configuration
+options as virtual ports, it makes sense to provide SR-IOV ports aside with
+virtual ports.
+
+Data model impact
+-----------------
+
+None
+
+REST API impact
+---------------
+
+None
+
+Security impact
+---------------
+
+None
+
+Notifications impact
+--------------------
+
+None
+
+Other end user impact
+---------------------
+
+None
+
+Performance Impact
+------------------
+
+Possible impact on performance may be due to pci_vendor_info match check during
+the attemt to bind port.
+
+Other deployer impact
+---------------------
+
+The deployer must configure the following configuration variables:
+
+* VLAN namespace and ranges to be used for OpenStack.
+* Supported pci vendor info records if different from default list.
+
+Developer impact
+----------------
+
+None
+
+Implementation
+==============
+
+Assignee(s)
+-----------
+
+Primary assignee:
+Irena Berezovsky <irenab>
+
+
+Work Items
+----------
+
+1. Ml2 Mechanism Driver for NIC based switch
+2. Ml2 Agent for NIC based switch
+3. ML2 RPC support for SR-IOV devices require by L2 agent
+
+Dependencies
+============
+
+Nova vif driver is required to support SR-IOV NIC based virtual interface.
+This functionality is added following the nova blueprint:
+https://blueprints.launchpad.net/nova/+spec/pci-passthrough-sriov
+
+Testing
+=======
+
+The code will be covered with unit tests.
+For tempest test coverage, third party testing is provided.
+The tests are run in devstack setup on physical server with SR-IOV
+ConnectX Family card.
+
+Documentation Impact
+====================
+
+Configuration Reference guide will be updated from the code.
+
+References
+==========
+
+SR-IOV support discussion details are here:
+
+https://wiki.openstack.org/wiki/Meetings/Passthrough