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</o:shapelayout></xml><![endif]--></head><body lang=DE link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>I still don’t get it.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>I can’t see the veth pair configured when calling <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>#ip link list<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>56: qbrea4f9446-76: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'> link/ether 66:83:23:7a:7c:4d brd ff:ff:ff:ff:ff:ff<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>57: qvoea4f9446-76: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'> link/ether 5e:0f:5b:63:3f:b2 brd ff:ff:ff:ff:ff:ff<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>58: qvbea4f9446-76: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master qbrea4f9446-76 state UP qlen 1000<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'> link/ether 66:83:23:7a:7c:4d brd ff:ff:ff:ff:ff:ff<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'>59: tapea4f9446-76: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master qbrea4f9446-76 state UNKNOWN qlen 500<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'> link/ether fe:16:3e:d7:d7:13 brd ff:ff:ff:ff:ff:ff<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Do other methods exist to configure veth pairs?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><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;font-family:"Tahoma","sans-serif"'>Von:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Erik McCormick [mailto:emccormick@cirrusseven.com] <br><b>Gesendet:</b> Mittwoch, 19. November 2014 17:18<br><b>An:</b> Stinner, Thomas<br><b>Cc:</b> openstack@lists.openstack.org<br><b>Betreff:</b> Re: [Openstack] Understanding Neutron/ML2/Openvswitch/VXLAN<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>This uses VLANs in the examples, but everything should still generally apply to your question:<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><a href="http://masimum.inf.um.es/fjrm/2013/12/26/the-journey-of-a-packet-within-an-openstack-cloud/">http://masimum.inf.um.es/fjrm/2013/12/26/the-journey-of-a-packet-within-an-openstack-cloud/</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Basically the TAP interface attaches to the qvb interface which links it to a veth pair (qvr and qvo) with qvo attached to the integration bridge (br-int) which then goes to patch-tun and into br-tun. Fun right? ;).<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Wed, Nov 19, 2014 at 10:12 AM, Stinner, Thomas <<a href="mailto:Thomas.Stinner@schweickertgruppe.de" target="_blank">Thomas.Stinner@schweickertgruppe.de</a>> wrote:<o:p></o:p></p><p class=MsoNormal>Hi,<br><br>i would like to understand how Neutron is configuring OpenVswitch when using ML2.<br><br>For example, on one of the compute nodes I have a VM that is called host-vxlan2. Instance name is instance-00000e7.<br><br>This VM has the following network interface:<br><br><interface type='bridge'><br> <mac address='fa:16:3e:d7:d7:13'/><br> <source bridge='qbrea4f9446-76'/><br> <target dev='tapea4f9446-76'/><br> <model type='virtio'/><br> <alias name='net0'/><br> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/><br> </interface><br><br>The bridge has two interfaces, a tap device that is connected to the vm and another interface.<br><br>qbrea4f9446-76 8000.6683237a7c4d no qvbea4f9446-76<br> tapea4f9446-76<br><br>OVs has three bridges - br-ex, br-int, br-tun.<br><br>However, none of these bridges contain qbrea4f9446-76 or qvbea4f9446-76. But they contain a Port "qvoea4f9446-76" (similar name!).<br><br>Which command defines the connection between "qvoea4f9446-76" and "qbrea4f9446-76"?<br><br>Thanks in advance<br>Thomas<br><br><br>_______________________________________________<br>Mailing list: <a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</a><br>Post to : <a href="mailto:openstack@lists.openstack.org">openstack@lists.openstack.org</a><br>Unsubscribe : <a href="http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack" target="_blank">http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>