Re: [libvirt-users] Connecting a VM to an existing OVS bridge

On 1/4/20 4:48 AM, Amir Sela wrote: > Hi, > I have an existing OVS bridge, that I can see in ovs-vsctl and use > for other purposes. Does the bridge show up when you run "ovs-vsctl list-br"? Both OVS bridges I have on my system are seen in that list. I created them both with "ovs-vsctl add-br BLAH". How did you create your bridges? > > I've edited the machine's XML as instructed in > http://docs.openvswitch.org/en/latest/howto/libvirt/ > > When I try to start the VM, i get > error: Cannot get interface MTU on 'ovsbr': No such device Is your OVS switch named "ovsbr"? > > Any ideas? > > (Note: I can't see the ovs switch in brctl show or any other regular > kernel tool, should it appear there?) On my Fedora 31 system at least, OVS devices are not visible in "brctl show", but they *are* visible with "ip link show". For example: 19: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 0a:f7:2a:85:08:7c brd ff:ff:ff:ff:ff:ff 20: ovsbr0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000 link/ether 96:92:7a:1d:a6:4c brd ff:ff:ff:ff:ff:ff

> > Versions: > openvswitch-2.10.1-3.fc30.x86_64 > libvirt-daemon-5.1.0-9.fc30.x86_64 The only differences on my system is the versions - I'm running Fedora 31, the openvswitch package is at 2.12, and libvirt is 6.0.0 (unreleased), but this is the same setup I've had for at least a few years. The only other package on the system with "openvswitch" in the name is "network-scripts-openvswitch", and I doubt that would have any effect like what you're talking about.