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.g...@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 > Please consider the environment before printing this email. > ------------------------------**------------------------------**------ > Visit theguardian.com > On your mobile, download the Guardian iPhone app theguardian.com/iphoneand > our iPad edition > theguardian.com/iPad Save up to 32% by subscribing to the Guardian and > Observer - choose the papers you want and get full digital access. > Visit subscribe.theguardian.com > > This e-mail and all attachments are confidential and may also > be privileged. If you are not the named recipient, please notify > the sender and delete the e-mail and all attachments immediately. > Do not disclose the contents to another person. You may not use > the information for any purpose, or store, or copy, it in any way. > > Guardian News & Media Limited is not liable for any computer > viruses or other material transmitted with or as part of this > e-mail. You should employ virus checking software. > > Guardian News & Media Limited > > A member of Guardian Media Group plc > Registered Office > PO Box 68164 > Kings Place > 90 York Way > London > N1P 2AP > > Registered in England Number 908396 > > ------------------------------**------------------------------** > -------------- > > > > ______________________________**_________________ > OpenStack-dev mailing list > OpenStack-dev@lists.openstack.**org <OpenStack-dev@lists.openstack.org> > http://lists.openstack.org/**cgi-bin/mailman/listinfo/**openstack-dev<http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev> >
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