[openstack-dev] [Neutron] [Docs] Definition of a provider Network

Kevin Benton blak111 at gmail.com
Tue Jan 19 15:19:21 UTC 2016

Yes, that definitely needs to be cleaned up a bit as well. Provider
networks still provide IP addresses, it's just that Neutron normally isn't
responsible for providing L3 routing for them.

On Tue, Jan 19, 2016 at 9:15 AM, Jay Pipes <jaypipes at gmail.com> wrote:

> On 01/19/2016 02:33 AM, Andreas Scheuring wrote:
>> Hi everybody,
>> I stumbled over a definition that explains the difference between a
>> Provider network and a self service network. [1]
>> To summarize it says:
>> - Provider Network: primarily uses layer2 services and vlan segmentation
>> and cannot be used for advanced services (fwaas,..)
>> - Self-service Network: is Neutron configured to use a overlay network
>> and supports advanced services (fwaas,..)
>> But my understanding is more like this:
>> - Provider Network: The Openstack user needs information about the
>> underlying network infrastructure to create a virtual network that
>> exactly matches this infrastructure.
>> - Self service network: The Openstack user can create virtual networks
>> without knowledge about the underlaying infrastructure on the data
>> network. This can also include vlan networks, if the l2 plugin/agent was
>> configured accordingly.
>> Did the meaning of a provider network change in the meantime, or is my
>> understanding just wrong?
> I don't know the answer to the above questions, however in reading some of
> the networking guide last night, I ran into a similar question around
> provider networks.
> In the "Scenario: Provider Networks with Linux bridge" document [0], the
> second paragraph has this statement:
> "Also, provider networks lack the concept of fixed and floating IP
> addresses because they only handle layer-2 connectivity for instances."
> and then, three paragraphs later, this statement is made:
> "To improve performance and reliability, provider networks move layer-3
> operations to the physical network infrastructure."
> So, which is it exactly? Do provider networks handle layer 3 or don't they?
> Best,
> -jay
> [0]
> http://docs.openstack.org/liberty/networking-guide/scenario_provider_lb.html
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Kevin Benton
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