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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Joehuang,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks for your input and description of the problem.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">What you are stating is just have DVR functionality for East-West traffic and all North-South traffic should go through the Centralized Router.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The North-South distributed reduces the burden in the Centralized Node. We eventually need to get away from the centralized node model.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I am not sure why there would be a use case to go back to the centralized model.<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">We were even initially planning to distribute the SNAT, but we just left it there centralized just to support the legacy services such as VPN.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Once we have service insertion and service chaining then we can distribute the SNAT functionality.<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">If you have a use case and willing to work on it and contribute code upstream, please let me know.<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<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Swami<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""> joehuang [mailto:joehuang@huawei.com]
<br>
<b>Sent:</b> Wednesday, January 14, 2015 7:07 PM<br>
<b>To:</b> </span><span lang="ZH-CN" style="font-size:10.0pt">龚永生</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">; Vasudevan, Swaminathan (PNB Roseville)<br>
<b>Cc:</b> OpenStack Development Mailing List (not for usage questions)<br>
<b>Subject:</b> RE: Re:RE: [openstack-dev] About DVR limit<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Hello,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Yongseng, correct, your description is much more concise, we need a configuration:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">east-west, DVR</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">south-north, legacy mode.</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-justify:inter-ideograph"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Best Regards<o:p></o:p></span></p>
<p class="MsoNormal" style="text-align:justify;text-justify:inter-ideograph"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Chaoyi Huang ( Joe Huang )<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;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"">
</span><span lang="ZH-CN" style="font-size:10.0pt">龚永生</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> [<a href="mailto:gong.yongsheng@99cloud.net">mailto:gong.yongsheng@99cloud.net</a>]
<br>
<b>Sent:</b> Thursday, January 15, 2015 10:18 AM<br>
<b>To:</b> Vasudevan, Swaminathan (PNB Roseville)<br>
<b>Cc:</b> joehuang; OpenStack Development Mailing List (not for usage questions)<br>
<b>Subject:</b> Re:RE: [openstack-dev] About DVR limit<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"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi, Swami, </span><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Joehuang,</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Calibri","sans-serif";color:#1F497D">in dvr compute nodes, it is 1:1 NAT FIP, means the floatingip for VM, and it is in the namespace of qrouter-xxxx.</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Calibri","sans-serif";color:#1F497D">but in dvr_snat node, it is 1:N NAT IP, it is for neutron router, and for the VMs which have no 1:1 FIP, implemented in namesapce snat-xxx.</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Joehuang's case can be implemented in legacy mode, I.E. non DVR,</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">but for the east-west traffic, we should consider the DVR, So I think there is a case:</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">east-west, DVR</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">south-north, legacy mode.</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Calibri","sans-serif";color:#1F497D">yong sheng gong</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><br>
</span><span lang="ZH-CN" style="font-size:8.5pt;color:black">在</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"> 2015-01-14 13:40:32</span><span lang="ZH-CN" style="font-size:8.5pt;color:black">，</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">"Vasudevan,
Swaminathan (PNB Roseville)" <<a href="mailto:swaminathan.vasudevan@hp.com">swaminathan.vasudevan@hp.com</a>>
</span><span lang="ZH-CN" style="font-size:8.5pt;color:black">写道：</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Joehuang,</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">FIP today as of Juno can be both in centralized node (dvr_snat) and distributed “dvr” compute nodes.</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Swami</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"> joehuang
[mailto:<a href="mailto:joehuang@huawei.com">joehuang@huawei.com</a>] <br>
<b>Sent:</b> Tuesday, January 13, 2015 7:49 PM<br>
<b>To:</b> OpenStack Development Mailing List (not for usage questions); </span><span lang="ZH-CN" style="font-size:10.0pt;font-family:"PMingLiU","serif";color:black">龚永生</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><br>
<b>Cc:</b> Vasudevan, Swaminathan (PNB Roseville)<br>
<b>Subject:</b> RE: [openstack-dev] About DVR limit</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi, Swami,</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">I would like to know whether the FIP under DVR could be configured to distributed mode or central
mode in Kilo, not find relevant information from <a href="http://specs.openstack.org/openstack/neutron-specs/">
http://specs.openstack.org/openstack/neutron-specs/</a>. </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">For example, it will be helpful for following FIP use cases: 1) FIP will be addressed centrally by
dedicated hardware 2) not all compute nodes have public address.</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:justify;text-justify:inter-ideograph">
<span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Best Regards</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;text-align:justify;text-justify:inter-ideograph">
<span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D">Chaoyi Huang ( Joe Huang )</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"> Stamina
than Valued an [<a href="mailto:souminathan@yahoo.com">mailto:souminathan@yahoo.com</a>]
<br>
<b>Sent:</b> Wednesday, January 14, 2015 11:05 AM<br>
<b>To:</b> </span><span lang="ZH-CN" style="font-size:10.0pt;color:black">龚永生</span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:black"><br>
<b>Cc:</b> <a href="mailto:swaminathan.vasudevan@hp.com">swaminathan.vasudevan@hp.com</a>;
<a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a><br>
<b>Subject:</b> Re: [openstack-dev] About DVR limit</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Hi yong Zheng,<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Yes your understanding is right.<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">We only support ovs driver.<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Regarding HA and multi network support, it will be available in kilo.<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Public address consumption for north south traffic for compute node is also true. But to address this issue we do have a proposal that is worked out by
the l3 sub team.<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">I hope this clarifies your doubts.<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Please let me know if I can help you with anything else.<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Thanks<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:black">Swami<br>
<br>
Sent from my iPad<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span style="color:black"><br>
On Jan 13, 2015, at 6:01 PM, <span lang="ZH-CN">龚永生</span> <<a href="mailto:gong.yongsheng@99cloud.net">gong.yongsheng@99cloud.net</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">Hi,</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"> I am yong sheng gong, I want to know if the DVR has these limits besides the documented at <a href="http://docs.openstack.org/networking-guide/content/ha-dvr.html:">http://docs.openstack.org/networking-guide/content/ha-dvr.html:</a>
</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">1. one subnet can be connected to DVR router only once, which is confirmed by BP <a href="https://blueprints.launchpad.net/neutron/+spec/neutron-ovs-dvr-multigateway">https://blueprints.launchpad.net/neutron/+spec/neutron-ovs-dvr-multigateway</a>
</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">2. one network cannot have more than one subnet connecting to DVR routers</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">So the DVR limits the neutron model to:</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">one network has just one subnet, and one subnet cannot connect to more than one DVR routers.</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">ps.</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black">req and limits documented at <a href="http://docs.openstack.org/networking-guide/content/ha-dvr.html:">http://docs.openstack.org/networking-guide/content/ha-dvr.html:</a>:</span><span style="color:black"><o:p></o:p></span></p>
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<h3><span style="font-family:"Verdana","sans-serif";color:black"> DVR requirements</span><span style="font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></h3>
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<p style="margin-left:.5in;text-indent:-.25in;font-stretch: normal"><span style="font-size:10.0pt;font-family:Symbol;color:black">·</span><span style="font-size:7.0pt;font-family:"Times New Roman","serif";color:black">
</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">You must use the ML2 plug-in for Open VSwitch (OVS) to enable DVR.</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p style="margin-left:.5in;text-indent:-.25in;font-stretch: normal"><span style="font-size:10.0pt;font-family:Symbol;color:black">·</span><span style="font-size:7.0pt;font-family:"Times New Roman","serif";color:black">
</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Be sure that your firewall or security groups allows UDP traffic over the VLAN, GRE, or VXLAN port to pass between the compute hosts.</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<h3><span style="font-family:"Verdana","sans-serif";color:black"> DVR limitations</span><span style="font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></h3>
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<p style="margin-left:.5in;text-indent:-.25in;font-stretch: normal"><span style="font-size:10.0pt;font-family:Symbol;color:black">·</span><span style="font-size:7.0pt;font-family:"Times New Roman","serif";color:black">
</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Distributed virtual router configurations work with the Open vSwitch Modular Layer 2 driver only for Juno.</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p style="margin-left:.5in;text-indent:-.25in;font-stretch: normal"><span style="font-size:10.0pt;font-family:Symbol;color:black">·</span><span style="font-size:7.0pt;font-family:"Times New Roman","serif";color:black">
</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">In order to enable true north-south bandwidth between hypervisors (compute nodes), you must use public IP addresses for every compute node and enable floating IPs.</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
<p style="margin-left:.5in;text-indent:-.25in;font-stretch: normal"><span style="font-size:10.0pt;font-family:Symbol;color:black">·</span><span style="font-size:7.0pt;font-family:"Times New Roman","serif";color:black">
</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">For now, based on the current neutron design and architecture, DHCP cannot become distributed across compute nodes.</span><span style="font-size:8.5pt;font-family:"Arial","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:8.5pt;font-family:"Verdana","sans-serif";color:black"> </span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">thanks,</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:black">Yong sheng gong</span><span style="color:black"><o:p></o:p></span></p>
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