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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Zhidong,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks for pointers.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">IMHO, we need to have a flexibility to attach/select a Subnet for Networks and as well support for L2/L3 mode selection.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Certainly this will extend the Neutron use cases for ex: NFV deployments etc.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Any comments?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Balaji.P<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Zhidong Yu [mailto:zdyu2000@gmail.com]
<br>
<b>Sent:</b> Friday, August 16, 2013 6:43 AM<br>
<b>To:</b> OpenStack Development Mailing List<br>
<b>Subject:</b> Re: [openstack-dev] [neutron] Why is "network" and "subnet" modeled separately?<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I asked the similar question before. Salvatore Orlando's answer makes sense to me. Please refer to
<a href="https://lists.launchpad.net/openstack/msg21928.html">https://lists.launchpad.net/openstack/msg21928.html</a><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p> </o:p></p>
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<p class="MsoNormal">On Thu, Aug 15, 2013 at 2:58 PM, Stephen Gran <<a href="mailto:stephen.gran@theguardian.com" target="_blank">stephen.gran@theguardian.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal"><br>
<br>
On 14/08/13 21:12, Lorin Hochstein wrote:<o:p></o:p></p>
<p class="MsoNormal">Here's a neutron implementation question: why does neutron model<br>
"network" and "subnet" as separate entities?<br>
<br>
Or, to ask another way, are there are any practical use cases where you<br>
would *not* have a one-to-one relationship between neutron networks and<br>
neutron subnets in an OpenStack deployment? (e.g. one neutron network<br>
associated with multiple neutron subnets, or one neutron network<br>
associated with zero neutron subnets)?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Different tenants might both use the same subnet range on different layer 2 networks.<br>
One one layer 2 network, you might run dual stacked, ie, ipv4 and ipv6.<br>
<br>
Supporting these use cases necessitates modeling them separately.<br>
<br>
Cheers,<br>
-- <br>
Stephen Gran<br>
Senior Systems Integrator - <a href="http://theguardian.com" target="_blank">theguardian.com</a><br>
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