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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I can share what I am seeing for Liberty since it is in works.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I have eno1 as the local network ( my premises end users etc)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Eno3 as the ceph network ( block storage interconnect)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Eno4 for internet ( out to isp)<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">I find liberty very intuitive and exceptionally brilliant in its network modelling.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">My uses cases :-<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:20.4pt;text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">demo user has a virtual router with a vxlan range 10.1.5.0/24 and then that router has a external network as eno4 that is connected to a layer3 that
routes to isp for floating ips. Mimics public cloud<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:20.4pt;text-indent:-.25in;mso-list:l0 level1 lfo1">
<![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Then I have user say legacy that sets the eno1 as the external network that connects to a layer3 that connects to the main core of our premises ( end
users etc). This provides for a private cloud.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">The users are just for management you can have all under one users<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Pending analysis for vlans for private and public.<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">You can see once I configured ml2 plugins to allow for vxlan on any interface and allow public networks for eno1 and eno4 the corresponding bridge is auto negotiated.<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"><img width="939" height="465" id="Picture_x0020_1" src="cid:image007.jpg@01D14FA2.BBC6CFC0"><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"><o:p> </o:p></span></p>
<p class="MsoNormal"><img width="1049" height="469" id="Picture_x0020_2" src="cid:image008.jpg@01D14FA2.BBC6CFC0"><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"><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">And below ports<o:p></o:p></span></p>
<p class="MsoNormal"><img width="1050" height="460" id="Picture_x0020_3" src="cid:image009.jpg@01D14FA2.BBC6CFC0"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></a></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Akshay Kumar Sanghai [mailto:akshaykumarsanghai@gmail.com]
<br>
<b>Sent:</b> Friday, January 15, 2016 2:11 PM<br>
<b>To:</b> James Denton <james.denton@rackspace.com><br>
<b>Cc:</b> openstack@lists.openstack.org<br>
<b>Subject:</b> Re: [Openstack] [openstack][neutron]external network packets to network node<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi James,<o:p></o:p></p>
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<p class="MsoNormal">Thanks for the explaination. How can i verify the existence of that bridge? Is br-ex that bridge as this is the only bridge that connects to external network interface? How can i view the namespace of the virtual router which is responsible
for the arp replies?<o:p></o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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<p class="MsoNormal">Akshay<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Sat, Jan 16, 2016 at 3:16 AM, James Denton <<a href="mailto:james.denton@rackspace.com" target="_blank">james.denton@rackspace.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Hi Akshay,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">In most cases, you won’t have IP addresses configured on interfaces used by Neutron. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">The Neutron L2 agents set up or configure the virtual bridges/switches on the host based on the type of network in use (VLAN, FLAT, VXLAN, etc). In many cases,
an external provider network may be setup as a VLAN network. In that case, the VLAN ID must correspond to the VLAN configured on the physical switch that corresponds to your external network connected to the external router. The Neutron virtual router will
connect to a virtual switch/bridge that effectively “bridges” the virtual network with the physical network. When that happens, your physical router and your virtual router will be in the same Layer 2 broadcast domain and Layer 3 network. Thus, when you have
floating IPs configured,they would come from the ‘external’ network/pool and your physical router would send ARP requests for those addresses. The virtual router would send ARP replies and the traffic would be forwarded and NAT’d accordingly.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Of course, all of this working depends on Neutron having been configured appropriately and the networks created with the proper provider attribute values.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Hope that helps,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">James<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-family:"Calibri",sans-serif;color:black">From:
</span></b><span style="font-family:"Calibri",sans-serif;color:black">Akshay Kumar Sanghai <<a href="mailto:akshaykumarsanghai@gmail.com" target="_blank">akshaykumarsanghai@gmail.com</a>><br>
<b>Date: </b>Friday, January 15, 2016 at 3:13 PM<br>
<b>To: </b>"<a href="mailto:openstack@lists.openstack.org" target="_blank">openstack@lists.openstack.org</a>" <<a href="mailto:openstack@lists.openstack.org" target="_blank">openstack@lists.openstack.org</a>><br>
<b>Subject: </b>[Openstack] [openstack][neutron]external network packets to network node<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black">Hi,
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Helvetica Neue";color:#4B4B4B">I have done a kilo ubuntu installation of openstack. One thing i noticed was the network node's external interface is unnumbered. Then how does the external router
forwards the packet to the network node? Suppose a vm has a floating ip . I send a packet to that vm using the floating ip. The nat happens at the network node. How does the packet reached the network node as there is no ip assigned to the interface. I have
not configured dvr and l3 agent is running on network node.</span><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Helvetica Neue";color:#4B4B4B">Thanks,</span><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Helvetica Neue";color:#4B4B4B">Akshay</span><span style="font-size:10.5pt;font-family:"Calibri",sans-serif;color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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