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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">So you mean that we can have two ways to solve this:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">#1. Check the duplicated route<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">or<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">#2. Define different “priority” (Maybe we can use “ip rule”)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">I’m not sure which is better...
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">If let me choose, I may use “#1”
</span><span lang="EN-US" style="font-family:Wingdings;color:#1F497D">J</span><span lang="EN-US" style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Liping Mao<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Yangxurong [mailto:yangxurong@huawei.com]
<br>
<b>Sent:</b> 2014</span><span style="font-size:10.0pt;font-family:宋体">年</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">7</span><span style="font-size:10.0pt;font-family:宋体">月</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">9</span><span style="font-size:10.0pt;font-family:宋体">日</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
16:09<br>
<b>To:</b> OpenStack Development Mailing List (not for usage questions)<br>
<b>Subject:</b> [openstack-dev] </span><span style="font-size:10.0pt;font-family:宋体">答复</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">: [neutron] add connect rout to router fail after deleteing<o:p></o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Yes, you are right, that’s the problem, so , I also prefer to check the connected route, we should forbid the duplicated connected route, otherwise, connected route can’t recover.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">but in physical router, we could add the connected route with different priority, so I’m not sure whether the restriction is necessary. What do you think?
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">XuRong Yang <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><b><span style="font-size:10.0pt;font-family:宋体">发件人<span lang="EN-US">:</span></span></b><span lang="EN-US" style="font-size:10.0pt;font-family:宋体"> Liping Mao -X (limao - YI JIN XIN XI FU WU(SU ZHOU)YOU
XIAN GONG SI at Cisco) [<a href="mailto:limao@cisco.com">mailto:limao@cisco.com</a>]
<br>
</span><b><span style="font-size:10.0pt;font-family:宋体">发送时间<span lang="EN-US">:</span></span></b><span lang="EN-US" style="font-size:10.0pt;font-family:宋体"> 2014</span><span style="font-size:10.0pt;font-family:宋体">年<span lang="EN-US">7</span>月<span lang="EN-US">9</span>日<span lang="EN-US">
15:23<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] [OpenStack-dev][neutron] add connect rout to router fail after deleteing<o:p></o:p></span></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">I’m not sure that I fully understand this, but I think the problem is because you add a route the same with the connected route.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Maybe we need to check if the route is duplicated with the connected route before we add with API?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Thanks.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Liping Mao<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Yangxurong [<a href="mailto:yangxurong@huawei.com">mailto:yangxurong@huawei.com</a>]
<br>
<b>Sent:</b> 2014</span><span style="font-size:10.0pt;font-family:宋体">年</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">7</span><span style="font-size:10.0pt;font-family:宋体">月</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">9</span><span style="font-size:10.0pt;font-family:宋体">日</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
14:56<br>
<b>To:</b> <a href="mailto:openstack-dev@lists.openstack.org">openstack-dev@lists.openstack.org</a><br>
<b>Subject:</b> [openstack-dev] [OpenStack-dev][neutron] add connect rout to router fail after deleteing<o:p></o:p></span></p>
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<p class="MsoNormal" align="left" style="text-align:left"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hi, neutron stackers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">My use case is as follows:<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US">1. create a router<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US">2. create a network with subnet 4.6.72.0/23<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US">3. attach the above subnet to the router<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US">4. update the router with route {destination: 4.6.72.0/23, nexthop: 4.6.72.10}, success<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US">5. remove the above route from the router, success<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US">6. update the router with the same route again, operation success, but the route isn't added to the router namespace, so not take effect<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US">This problem is caused by removing the connected route, so when adding the route the second time, "ip route replace" command fail.<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I think we need to restrict the modification of connected route.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have reported a bug: <a href="https://bugs.launchpad.net/neutron/+bug/1339028">
https://bugs.launchpad.net/neutron/+bug/1339028</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Any thoughts?<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:10.5pt;mso-para-margin-left:1.0gd"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Cheers,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">XuRong Yang<o:p></o:p></span></p>
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