Description of problem:

br-int can not start automatically after rebooting

ovs-vsctl show doesn't show br-int.

In ovs-vswitch.log we have

2018-12-18T04:20:43.690Z|00160|bridge|INFO|bridge br-int: deleted interface vlan40 on port 3
2018-12-18T04:20:43.690Z|00161|bridge|INFO|bridge br-int: deleted interface vlan20 on port 2
2018-12-18T04:20:43.690Z|00162|bridge|INFO|bridge br-int: deleted interface vlan50 on port 4
2018-12-18T04:20:43.690Z|00163|bridge|INFO|bridge br-int: deleted interface br-int on port 65534
2018-12-18T04:20:43.690Z|00164|bridge|INFO|bridge br-int: deleted interface eno2 on port 1

Version-Release number of selected component (if applicable):

openvswitch-2.9.0-56.el7fdp.x86_64
OpenStack 13

How reproducible:

100% in customer's environment

Steps to Reproduce:
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Actual results:


Expected results:


Additional info:

1. This issue is preventing neutron-ovs-agent from starting.

2. If the customer restart network service then the br-int could start

3. The log is available in the supportshell and the case number is 02275436.