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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