(Using ML2 with ovs)
While playing with https://github.com/stackforge/cookbook-openstack-network/blob/master/files/default/neutron-ha-tool.py to migrate routers between L3 agents, I had the issue that the connectivity got lost.
After investigating, it turns out that interface for the port of the router that is connected to the external network (attached to br-public -- which is usually named br-ext) gets a tag. Manually removing the tag makes things work.
I'm attaching a bit of the log where the port_update message is received (it's received for the two interfaces of the router, so this needs some care when reading). We can see the following:
Running command: ['sudo', '/usr/bin/neutron-rootwrap', '/etc/neutron/rootwrap.conf', 'ovs-vsctl', '--timeout=2', 'set', 'Port', 'qg-923f9b0e-aa', 'tag=2']
However, reading the code, it seems that this kind of actions should only be done for ports on br-int (because of "vif_port = self.int_br.get_vif_port_by_id(port['id'])"). So this shouldn't be run for other ports.
Fix proposed to branch: master
Review: https:/