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<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">Hello, OVS friends, I am a novice who uses ovs. Now encounter a thorny problem.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">Basic environment</span><span style="font-size:14.0pt;font-family:宋体">：</span><span lang="EN-US" style="font-size:14.0pt">CentOS Linux release 7.4.1708 (Core)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"> Linux version 3.10.0-693.2.2.el7.x86_64<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">Installation procedure reference</span><span style="font-size:14.0pt;font-family:宋体">：</span><span lang="EN-US" style="font-size:14.0pt"><a href="http://docs.openvswitch.org/en/latest/intro/install/dpdk/">http://docs.openvswitch.org/en/latest/intro/install/dpdk/</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"> &
<a href="http://docs.openvswitch.org/en/latest/intro/install/general/">http://docs.openvswitch.org/en/latest/intro/install/general/</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">Test Environment</span><span style="font-size:14.0pt;font-family:宋体">：</span><span lang="EN-US" style="font-size:14.0pt"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;color:red">Urgent problem to show</span><span style="font-size:14.0pt;font-family:宋体;color:red">：（</span><span lang="EN-US" style="font-size:14.0pt;color:red">1</span><span style="font-size:
14.0pt;font-family:宋体;color:red">）</span><span lang="EN-US" style="font-size:
14.0pt;color:red">Tester
found: Large loss of data packets when 100</span><span style="font-size:14.0pt;font-family:宋体;color:red">、</span><span lang="EN-US" style="font-size:14.0pt;color:red">1000Mb/s and 10Gb/s<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;color:red">
</span><span style="font-size:14.0pt;font-family:宋体;color:red">（</span><span lang="EN-US" style="font-size:14.0pt;color:red">2</span><span style="font-size:14.0pt;
font-family:宋体;color:red">）</span><span lang="EN-US" style="font-size:14.0pt;
color:red">ethtool
command as shown below</span><span style="font-size:14.0pt;
font-family:宋体;color:red">（</span><span lang="EN-US" style="font-size:14.0pt;
color:red">and can not modify field “speed”</span><span style="font-size:14.0pt;
font-family:宋体;color:red">）：</span><span lang="EN-US" style="font-size:14.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"><img border="0" width="1056" height="306" id="图片_x0020_6" src="cid:image003.png@01D35173.2338A4C0"></span><span lang="EN-US" style="font-size:14.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">
</span><span style="font-size:14.0pt;font-family:宋体;color:red">（</span><span lang="EN-US" style="font-size:14.0pt;color:red">3</span><span style="font-size:14.0pt;
font-family:宋体;color:red">）</span><span lang="EN-US" style="font-size:14.0pt;
color:red">ovs-vsctl
list command as shown below</span><span style="font-size:
14.0pt;font-family:宋体;color:red">（</span><span lang="EN-US" style="font-size:
14.0pt;color:red">link_speed=10,000,000=10Mb/s</span><span style="font-size:
14.0pt;font-family:宋体;color:red">，</span><span lang="EN-US" style="font-size:
14.0pt;color:red">Only
“options” fields can be manually modified to “link_speed=10G”</span><span style="font-size:14.0pt;font-family:宋体;color:red">）</span><span lang="EN-US" style="font-size:14.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"><img border="0" width="1385" height="579" id="图片_x0020_15" src="cid:image004.png@01D35188.BF945D90"></span><span lang="EN-US" style="font-size:14.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;color:red">Urgent problem</span><span style="font-size:14.0pt;font-family:宋体;color:red">：（</span><span lang="EN-US" style="font-size:14.0pt;color:red">1</span><span style="font-size:14.0pt;
font-family:宋体;color:red">）</span><span lang="EN-US" style="font-size:14.0pt;
color:red">Whether
a large number of lost packets because speed=10Mb/s</span><span style="font-size:14.0pt;font-family:宋体;color:red">？</span><span lang="EN-US" style="font-size:14.0pt;color:red">How to modify this value</span><span style="font-size:14.0pt;font-family:宋体;color:red">？</span><span lang="EN-US" style="font-size:14.0pt;color:red"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">
</span><span style="font-size:14.0pt;font-family:宋体;color:red">（</span><span lang="EN-US" style="font-size:14.0pt;color:red">2</span><span style="font-size:14.0pt;
font-family:宋体;color:red">）</span><span lang="EN-US" style="font-size:14.0pt;
color:red">Why
create ovs-switch</span><span style="font-size:14.0pt;
font-family:宋体;color:red">（</span><span lang="EN-US" style="font-size:14.0pt;
color:red">datapath_type=netdev</span><span style="font-size:14.0pt;font-family:
宋体;color:red">）</span><span lang="EN-US" style="font-size:14.0pt;color:red">will
make the default link_speed=10Mb/s</span><span style="font-size:14.0pt;
font-family:宋体;color:red">？</span><span lang="EN-US" style="font-size:14.0pt;
color:red"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:63.0pt;text-indent:21.0pt"><span style="font-size:14.0pt;font-family:宋体;color:red">（</span><span lang="EN-US" style="font-size:14.0pt;color:red">3</span><span style="font-size:14.0pt;
font-family:宋体;color:red">）</span><span lang="EN-US" style="font-size:14.0pt;
color:red">Whether
or not special parameter settings are required for link_speed=10Gb/s</span><span style="font-size:14.0pt;font-family:宋体;color:red">？</span><span lang="EN-US" style="font-size:14.0pt"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt">Remarks</span><span style="font-size:14.0pt;font-family:宋体">：（</span><span lang="EN-US" style="font-size:14.0pt">1</span><span style="font-size:14.0pt;font-family:
宋体">）</span><span lang="EN-US" style="font-size:14.0pt">Virtual
Firewall status is ok.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt"><o:p> </o:p></span></p>
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