an introduction to openstack networking

Scott Lowe, VCDXEngineering Architect, Virtual NetworksNetwork & Security Business Unit, VMware, Inc.

An Introduction to OpenStack Networking

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Wednesday, April 24, 13

Agenda

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§OpenStack Networking overview§Open vSwitch overview§Nicira NVP overview§Example OpenStack Networking use cases

§ Logical view§ Physical view with Open vSwitch plugin§ Physical view with NVP plugin

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OpenStack Networking overview

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§Formerly known as “Quantum” but ran into trademark issues

§Designed to provide “Network-as-a-Service” functionality

§Supplies a consistent API for provisioning network services

§Uses a plugin architecture to allow a variety of backend providers

§Leverages a number of open source technologies (network namespaces, Linux bridges, Open vSwitch, dnsmasq)

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OpenStack Networking architecture

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OpenStack Networking architecture

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OpenStack Networking plugins

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§Big Switch Networks§Brocade§Cisco§Hyper-V§Linux Bridge§Meta Plugin§Midokura Midonet

§NEC OpenFlow§Nicira NVP§Open vSwitch§PLUMgrid§Ryu OpenFlow

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Open vSwitch (OVS) overview

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§An open source, highly programmable virtual switch§Supports OpenFlow, 802.1Q VLANs, LACP, STP§Supports KVM and Xen§OVS serves as the basis for a number of different SDN/network virtualization platforms

§Currently the default networking stack for XenServer and Xen Cloud Platform (XCP)

§More information available at http://openvswitch.org or http://blog.scottlowe.org/tag/ovs

Wednesday, April 24, 13

Nicira NVP overview

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§Scale-out controller architecture with northbound APIs

§Leverages OVS across hypervisor platforms§ Uses OVSDB API to communicate with the controllers§ Receives flow configuration from controllers via

OpenFlow§Leverages multiple network encapsulation protocols

§ Uses STT and GRE for encapsulation§ Supports IPSec with STT/GRE for certain use cases

§Supplies both L2 (switched) and L3 (routed) gateway services

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Example OpenStack Networking use cases

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§Use case #1: Single flat network§Use case #2: Multiple flat networks§Use case #3: Mixed flat and private networks§Use case #4: Provider router with private networks§Use case #5: Per-tenant routers with private networks

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Use case #1: Single flat network(logical view)

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Use case #1: Single flat network(physical view)

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Use case #2: Multiple flat networks (logical view)

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Use case #2: Multiple flat networks (physical view)

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Use case #3: Mixed flat and private networks (logical view)

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Use case #3: Mixed flat and private networks (physical view)

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Use case #4: Provider router withprivate networks (logical view)

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Use case #4: Provider router withprivate networks (physical view)

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Use case #5: Per-tenant routers with private networks (logical view)

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Use case #5: Per-tenant routers with private networks (physical view)

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Q&A

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Thank You

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Wednesday, April 24, 13