<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><div>Hi zhuna<br> I think carl means that there is not need dynamic route protocol here, arp proxy is enough, but i have a concern here, upstream router should have a mechanism to let private gateway ip address as arp source protocol address, since fg device has private ip address?<br></div><br><br><br><div style="position:relative;zoom:1"></div><div id="divNeteaseMailCard"></div><br>At 2016-08-03 15:22:15, "zhuna" <juno.zhu@huawei.com> wrote:<br> <blockquote id="isReplyContent" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
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<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">Hi Carl,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">IMO, if the upstream router has the route to floating ip subnet, no need to assign additional IP address to the router.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">For example, there are 2 subnets in external network,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">Subnet1: 10.0.0.0/24 (fg ip address)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">Subnet2: 9.0.0.0/24 (fip)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">Suppose assign fip 9.0.0.10 for vm1, and the fg ip address is 10.0.0.10, so there are 2 ip address configured in fg, one is 9.0.0.10 and 10.0.0.10.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">+-------------------+<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">| router ns |<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">+-------------------+<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"> | fg (10.0.0.10, 9.0.0.10)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"> |<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"> |<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"> | router-if (10.0.0.1)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">+---------------------------+<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">| upstream router |---------------------------- Internet<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">+---------------------------+<o:p></o:p></span></p>
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<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US">The default route of router ns is 10.0.0.1, add a static route 9.0.0.10/32 10.0.0.10 to upstream router , or learn the route by routing protocol
(neutron-dynamic-routing).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497D" lang="EN-US"><o:p> </o:p></span></p>
<div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="font-size:10.0pt">发件人<span lang="EN-US">:</span></span></b><span style="font-size:10.0pt" lang="EN-US"> Carl Baldwin [mailto:<a href="mailto:carl@ecbaldwin.net">carl@ecbaldwin.net</a>]
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</span><b><span style="font-size:10.0pt">发送时间<span lang="EN-US">:</span></span></b><span style="font-size:10.0pt" lang="EN-US"> 2016</span><span style="font-size:10.0pt">年<span lang="EN-US">8</span>月<span lang="EN-US">3</span>日<span lang="EN-US"> 6:39<br>
</span><b>收件人<span lang="EN-US">:</span></b><span lang="EN-US"> OpenStack Development Mailing List (not for usage questions)<br>
</span><b>主题<span lang="EN-US">:</span></b><span lang="EN-US"> Re: [openstack-dev] [neutron][dvr][fip] fg device allocated private ip address<o:p></o:p></span></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">On Tue, Aug 2, 2016 at 6:15 AM, huangdenghui <<a href="mailto:hdh_1983@163.com" target="_blank">hdh_1983@163.com</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">hi john and brain<br>
thanks for your information, if we get patch[1],patch[2] merged,then fg can allocate private ip address. after that, we need consider floating ip dataplane, in current dvr implementation, fg is used to reachment testing for floating ip, now,with subnet types
bp,fg has different subnet than floating ip address, from fg'subnet gateway point view, to reach floating ip, it need a routes entry, destination is some floating ip address, fg'ip address is the nexthop, and this routes entry need be populated at the event
of floating ip creating, deleting when floating ip is dissociated. any comments?<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">The fg device will still do proxy arp for the floating ip to other devices on the external network. This will be part of our testing. The upstream router should still have an on-link route on the network to the floating
ip subnet. IOW, you shouldn't replace the floating ip subnet with the private fg subnet on the upstream router. You should add the new subnet to the already existing ones and the router should have an additional IP address on the new subnet to be used as the
gateway address for north-bound traffic.<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Carl<o:p></o:p></span></p>
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