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<div><span></span>Hi All,</div><blockquote style="margin-top: 0px; margin-bottom: 0px; margin-left: 0.5em;"><div><div class="FoxDiv20170526122755033734"><div><br></div><div>I met a problem of dns packet lost in openstack environment. I need help. </div><div><br></div><div>The problem desc:</div><div><br></div><div><span style="color: rgb(0, 0, 0); font-size: 10.5pt; line-height: 1.5; background-color: rgba(0, 0, 0, 0);">In the vm, I use "curl</span><span style="font-size: 10.5pt; line-height: 1.5; background-color: window;"> </span><a href="http://www.baidu.com" "="" style="font-size: 10.5pt; line-height: 1.5; background-color: window;">http://www.baidu.com"</a> to do test. And the cmd takes almost 5 seconds return.</div><div>So I use tcpdump to capture the packets. And found a dns packet lost which is AAAA packet for ipv6.</div><div><br></div><div>The <span style="background-color: rgba(0, 0, 0, 0); font-size: 10.5pt; line-height: 1.5;">packet-lost-on-qbr.zip are the captured packets which is from qbr to qvb. It clearly shows the lost packet.</span></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> </span></div><div><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">In my another openstack environment, the problem can not occur. The </span><span style="background-color: rgba(0, 0, 0, 0); font-size: 10.5pt; line-height: 1.5;">qbr-no-packet-lost.zip is the captured packets.</span></div><div><span style="background-color: rgba(0, 0, 0, 0); font-size: 10.5pt; line-height: 1.5;"><br></span></div><div><span style="background-color: rgba(0, 0, 0, 0); font-size: 10.5pt; line-height: 1.5;">Thanks</span></div><div><span><div style="margin: 10px;"><font face="verdana" size="2"><span style="color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"></span></font></div></span></div>
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