© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 1 Kyle Mestery Principal Engineer, Office of the Cloud CTO, Cisco

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 2 Original Goal: The Modular Layer 2 (ML2) Plugin is a framework allowing OpenStack Networking to simultaneously utilize the variety of layer 2 networking technologies found in complex real-world datacenters. ML2 was designed to ease the burden of adding new L2 networking technologies into OpenStack Networking. ML2 will deprecate the Open vSwitch, LinuxBridge, and Hyper-V monolithic Neutron Plugins It works with each of their existing L2 agents simultaneously

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 3 ML2 exposes two different types of drivers: “Type” and “Mechanism” ML2 TypeDrivers: Maintain type-specific state Provide tenant network allocation Validate provider networks Current TypeDrivers: local, flat, VLAN, GRE, and VXLAN ML2 MechanismDrivers: Responsible for taking information supplied by TypeDrivers and ensuring it is properly applied given the specific networking mechanisms which have been enabled Current MechanismDrivers: Arista, Cisco Nexus, Hyper-V, L2 Population, LinuxBridge, Open vSwitch, Tail-F NCS

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 4 Maintain type-specific state Provide tenant network allocation Validate provider networks Current TypeDrivers: local, flat, VLAN, GRE, and VXLAN

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 5 Responsible for taking information supplied by TypeDrivers and ensuring it is properly applied given the specific networking mechanisms which have been enabled Current MechanismDrivers: Arista, Cisco Nexus, Hyper-V, L2 Population, LinuxBridge, Open vSwitch, Tail-F NCS MechanismDrivers can work with many different technologies: Agent based MechanismDrivers (Hyper-V, LinuxBridge, and OVS) Controller based MechanismDrivers (Tail-F NCS and OpenDaylight) ToR switch MechanismDrivers (Arista and Cisco Nexus)

© 2010 Cisco and/or its affiliates. All rights reserved. Cisco Confidential 6 Neutron Server ML2 Plugin Type Manager Mechanism Manager VLAN TypeDriver VLAN TypeDriver GRE TypeDriver GRE TypeDriver VXLAN TypeDriver VXLAN TypeDriver OVS/LinuxBr idge Cisco Nexus Arista L2 Population Tail-F NCS API Extensions Hyper-V