Hi, my system got updated to libvirt 6.0.0 (from 5.6.0) this morning, and now I'm having problems starting VMs that make use of openvswitch portgroups. When I start a VM, I get this error message on virsh:

virsh # start testvm error: Failed to start domain testvm error: An error occurred, but the cause is unknown

The system log contains:

Mar 30 09:45:39 tplinux ovs-vsctl[2763]: ovs|00001|db_ctl_base|ERR|'del-port' command requires at least 1 arguments Mar 30 09:45:39 tplinux libvirtd[735]: internal error: Child process (ovs-vsctl --timeout=5 -- --if-exists del-port) unexpected exit status 1: ovs-vsctl: 'del-port' command requires at least 1 arguments Mar 30 09:45:39 tplinux libvirtd[735]: internal error: Unable to delete port (null) from OVS

My network "test-net" looks like:

<network> <name>test-net</name> <forward mode='bridge'/> <bridge name='test-net'/> <virtualport type='openvswitch'/> <portgroup name='fabric' default='yes'> <vlan trunk='yes'> <tag id='10' nativeMode='untagged'/> <tag id='20'/> <tag id='30'/> <tag id='40'/> <tag id='50'/> <tag id='60'/> <tag id='70'/> </vlan> </portgroup> </network>

And the network in the domain xml file is:

<interface type='network'> <mac address='01:23:45:67:89:ab'/> <source network='test-net' portgroup='fabric'/> <model type='e1000'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </interface>

I didn't see any change in the changelog related to ovs or portgroups. Is there something I need to change in my VM definition? Thanks, Thomas