Open Stack

I asked the similar question before. Salvatore Orlando's answer makes sense
to me. Please refer to https://lists.launchpad.net/openstack/msg21928.html



On Thu, Aug 15, 2013 at 2:58 PM, Stephen Gran
<stephen.gran at theguardian.com>wrote:

> Hi,
>
>
> On 14/08/13 21:12, Lorin Hochstein 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)?
>>
>
> Different tenants might both use the same subnet range on different layer
> 2 networks.
> One one layer 2 network, you might run dual stacked, ie, ipv4 and ipv6.
>
> Supporting these use cases necessitates modeling them separately.
>
> Cheers,
> --
> Stephen Gran
> Senior Systems Integrator - theguardian.com
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