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<p class="MsoNormal"><span style="font-size:11.0pt;color:black">I have an issue that when I add a vhost port to a an OVS bridge (and it doesn’t matter if it is vhostuser or vhostuserclient), the port adds okay, but the link state remains down and the port serves
no traffic. I have a DPDK NIC attached to this same bridge, and it appears to work.</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">The more interesting thing, is that the vhost ports seem to work if I crank the VM up with a bash script that runs qemu-kvm and all the options along with it.</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">The OVS version is 2.11.1, compiled with DPDK version 18.11.8. The kernel version is 3.10.0-1127.13.1.el7.x86_64. </span><span style="color:black"><o:p></o:p></span></p>
<ul style="margin-top:0in" type="disc">
<li class="MsoNormal" style="color:black;mso-list:l0 level1 lfo1"><span style="font-size:11.0pt">I looked into updating to a 4.x kernel, but I am running CentOS7 and the CentOS folks told me that they backport, and that updating the kernel would cause more
problems than I could ever possibly solve.</span><o:p></o:p></li></ul>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Originally, I suspected vhostuserclient to be the issue, and backed down from that and went to vhostuser (where the OVS is the server and QEMU is the client). Same problem.</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">The XML I am using is:</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><interface type=’vhostuser’></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><mac address=’52:54:00:d1:ba:7a’/></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><source type=’unix’ path=’/var/run/openvswitch/dpdkvhost1’ mode=’client’/></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><model type=’virtio’/></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"><address type=’pci’ domain=’0x0000’ bus=’0x00’ slot=’0x0b’ function=’0x0’/></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"></interface></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Pretty standard config. Now one thing I will mention, is that I have to put 777 on that socket in the /var/run/openvswitch directory for the VM to start up with virsh-manager GUI. The reason for
this is that qemu cannot write to a socket that is created by openvswitch using the openvswitch user group. But I don’t think that matters at all.</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Does anyone have a clue on why this doesn’t work? Or how to get this port link state back up and serving traffic?</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black"> </span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:black">Mark</span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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