[openstack-dev] [neutron] Why is "network" and "subnet" modeled separately?

Jay Buffington me at jaybuff.com
Wed Aug 14 20:31:34 UTC 2013

network is layer 2 and subnet is layer 3.

A common use case would be that one tenant creates a network with a subnet.  Another tenant wants to use that same network, so they
create a new network and can also create the subnet.

On Wed, Aug 14, 2013 at 1:12 PM, Lorin Hochstein
<lorin at nimbisservices.com>wrote:

> Here's a neutron implementation question: why does neutron model "network"
> and "subnet" as separate entities?
> Or, to ask another way, are there are any practical use cases where you
> would *not* have a one-to-one relationship between neutron networks and
> neutron subnets in an OpenStack deployment? (e.g. one neutron network
> associated with multiple neutron subnets, or one neutron network associated
> with zero neutron subnets)?
> Lorin
> --
> Lorin Hochstein
> Lead Architect - Cloud Services
> Nimbis Services, Inc.
> www.nimbisservices.com
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> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
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