Cloud · IceHouse · Network Management · Neutron · Open source · Open vSwitch · OpenStack · Virtualization

L2 connectivity in OpenStack using OpenvSwitch mechanism driver

L2 connectivity is the most basic requirement in a network. All cloud platforms allow users to create subnets. Subnets are L2 segments to which the servers attach their interfaces to and start sending and receiving traffic. Servers on the same L2 segment can reach each other directly. They only need to resolve the destination MAC address using ARP. In the world of networking this service is provided by your access switch.

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Cloud · IceHouse · Network Management · Neutron · OpenStack

Managing Openstack Internal/Data/External network in one interface

A common problem for people who want to try Openstack without a full blown hardware setup is that they have just one network interface. Openstack identifies three distinct networks

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Cloud · Havana · IceHouse · Network Management · Neutron · Open vSwitch · OpenFlow · OpenStack · Quantum

Open vSwitch in Openstack

Coffee Breaks

A multitude of Openstack users eventually run into Open vSwitch. Not because they want to, but because they have to. So here is something to deconstruct what Open vSwitch really is, and what it does.

What is Open vSwitch?

In the words of the Open vSwitch website:

“Open vSwitch is a production quality, multilayer virtual switch licensed under the open source Apache 2.0 license.  It is designed to enable massive network automation through programmatic extension, while still supporting standard management interfaces and protocols (e.g. NetFlow, sFlow, SPAN, RSPAN, CLI, LACP, 802.1ag).”

Openstack uses Open vSwitch as its default virtual switch. There are various reasons for this. The primary reason is VLAN support. Open vSwitch is inherently built with VLAN support, and Openstack uses VLANs extensively to differentiate between its virtual networks. Also, Open vSwitch is works very well in a distributed environment. This is extremely important in a platform like…

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Cloud · Havana · Network Management · Neutron · OpenStack · Ubuntu

OpenStack Havana on Ubuntu 12.04 LTS – Single machine setup

The Single machine setup has all the services running. Cinder part is to be added in the future.

Install Ubuntu 12.04 with partitioning scheme as per your requirements.

Note: Run all the commands as super-user. We assume that the IP of the Single machine is

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