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Hello all,

I am doing an upgrade with kolla ansible from Wallaby to Xena, using 
source containers on ubuntu and openvswitch. After the upgrade, there is 
no connectivity from the VMs to the network (both provider networks and 
self-service) and also neutron services (dhcp, l3-agent, metadata) do 
not work. For the VMs I had no errors related, while for neutron 
services, probably due to lack of connectivity a continuous flapping of 
virtual routers and dhcp agents.

I have downgraded neutron_openvswitch_agent, openvswitch_vswitchd and 
openvswitch_db to wallaby again and it everything works. I suspect there 
is something related to the flows created from the neutron agent but was 
not able to identify anything specific.

Any help to debug this and identify the root cause is greatly appreciated.

Thank you!
a.