Comment 6 for bug 1697243

I found it's not as you said.

[DEFAULT]
debug = True

Now I manully delete the flow rule as following , but I don't find any about info in neutron log.
[root@cloud-sz-master-b12-02 ~]# ovs-ofctl dump-flows provision
NXST_FLOW reply (xid=0x4):
 cookie=0x80d0c34387b440b5, duration=54165.293s, table=0, n_packets=856, n_bytes=63275, idle_age=161, priority=4,in_port=2,dl_vlan=2 actions=strip_vlan,NORMAL
[root@cloud-sz-master-b12-02 ~]# ovs-ofctl del-flows provision priority=4
ovs-ofctl: unknown keyword priority
[root@cloud-sz-master-b12-02 ~]# ovs-ofctl del-flows provision in_port=2