<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hi yong Zheng,</div><div>Yes your understanding is right.</div><div>We only support ovs driver.</div><div>Regarding HA and multi network support, it will be available in kilo.</div><div><br></div><div>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.</div><div><br></div><div>I hope this clarifies your doubts.</div><div><br></div><div>Please let me know if I can help you with anything else.</div><div><br></div><div>Thanks</div><div>Swami<br><br>Sent from my iPad</div><div><br>On Jan 13, 2015, at 6:01 PM, 龚永生 <<a href="mailto:gong.yongsheng@99cloud.net">gong.yongsheng@99cloud.net</a>> wrote:<br><br></div><blockquote type="cite"><div><div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Hi,</div><div> 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:" _src="http://docs.openstack.org/networking-guide/content/ha-dvr.html:">http://docs.openstack.org/networking-guide/content/ha-dvr.html:</a> </div><div><br></div><div>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" _src="https://blueprints.launchpad.net/neutron/+spec/neutron-ovs-dvr-multigateway">https://blueprints.launchpad.net/neutron/+spec/neutron-ovs-dvr-multigateway</a> </div><div>2. one network cannot have more than one subnet connecting to DVR routers</div><div><br></div><div><br></div><div>So the DVR limits the neutron model to:</div><div>one network has just one subnet, and one subnet cannot connect to more than one DVR routers.</div><div><br></div><div><br></div><div>ps.</div><div>req and limits documented at <a href="http://docs.openstack.org/networking-guide/content/ha-dvr.html:" _src="http://docs.openstack.org/networking-guide/content/ha-dvr.html:" style="line-height: 23.7999992370605px;">http://docs.openstack.org/networking-guide/content/ha-dvr.html:</a>:</div><div><div class="section" style="font-family: Verdana, Geneva, sans-serif; font-size: 12px; line-height: normal;"><div class="titlepage"><h3 class="title"><a id="dvr-requirements"> </a>DVR requirements</h3></div><div class="itemizedlist"><ul class="itemizedlist" type="disc" style="font-stretch: normal; font-size: 10pt;"><li class="listitem" style="font-stretch: normal; font-size: 10pt;"><p style="font-stretch: normal; font-size: 10pt;">You must use the ML2 plug-in for Open VSwitch (OVS) to enable DVR.</p></li><li class="listitem" style="font-stretch: normal; font-size: 10pt;"><p style="font-stretch: normal; font-size: 10pt;">Be sure that your firewall or security groups allows UDP traffic over the VLAN, GRE, or VXLAN port to pass between the compute hosts.</p></li></ul></div></div><div class="section" style="font-family: Verdana, Geneva, sans-serif; line-height: normal;"><div class="titlepage" style="font-size: 12px;"><h3 class="title"><a id="dvr-limitations"> </a>DVR limitations</h3></div><div class="itemizedlist"><ul class="itemizedlist" type="disc" style="font-size: 10pt; font-stretch: normal;"><li class="listitem" style="font-stretch: normal; font-size: 10pt;"><p style="font-stretch: normal; font-size: 10pt;">Distributed virtual router configurations work with the Open vSwitch Modular Layer 2 driver only for Juno.</p></li><li class="listitem" style="font-stretch: normal; font-size: 10pt;"><p style="font-stretch: normal; font-size: 10pt;">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.</p></li><li class="listitem" style="font-stretch: normal; font-size: 10pt;"><p style="font-stretch: normal; font-size: 10pt;">For now, based on the current neutron design and architecture, DHCP cannot become distributed across compute nodes.</p></li></ul><div><font size="2"><br></font></div><div><font size="2">thanks,</font></div><div><font size="2">Yong sheng gong</font></div></div></div></div></div></div></blockquote></body></html>