This uses VLANs in the examples, but everything should still generally apply to your question:
http://masimum.inf.um.es/fjrm/2013/12/26/the-journey-of-a-packet-within-an-openstack-cloud/ 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? ;). On Wed, Nov 19, 2014 at 10:12 AM, Stinner, Thomas < [email protected]> wrote: > Hi, > > i would like to understand how Neutron is configuring OpenVswitch when > using ML2. > > For example, on one of the compute nodes I have a VM that is called > host-vxlan2. Instance name is instance-00000e7. > > This VM has the following network interface: > > <interface type='bridge'> > <mac address='fa:16:3e:d7:d7:13'/> > <source bridge='qbrea4f9446-76'/> > <target dev='tapea4f9446-76'/> > <model type='virtio'/> > <alias name='net0'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' > function='0x0'/> > </interface> > > The bridge has two interfaces, a tap device that is connected to the vm > and another interface. > > qbrea4f9446-76 8000.6683237a7c4d no > qvbea4f9446-76 > > tapea4f9446-76 > > OVs has three bridges - br-ex, br-int, br-tun. > > However, none of these bridges contain qbrea4f9446-76 or qvbea4f9446-76. > But they contain a Port "qvoea4f9446-76" (similar name!). > > Which command defines the connection between "qvoea4f9446-76" and > "qbrea4f9446-76"? > > Thanks in advance > Thomas > > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : [email protected] > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >
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