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[Slawek Kaplonski <1920700@xxxxxxxxxxxxxxxxxx>]

** Changed in: neutron
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1920700

Title:
  When OVS  restart, some flows  will be missing in the br-int

Status in neutron:
  Fix Released

Bug description:
  When OVS restart and executed here (https://github.com/openstack/neutron/blob/80dfbb03715ff3b8ee06f698df4bfa95d285b0e5/neutron/plugins/ml2/drivers/openvswitch/agent/ovs_neutron_agent.py#L2579), some flows will be missing in the br-int, as follows:
   * table=60, n_packets=230017, n_bytes=25281846, priority=4,in_port="int-br-floating" actions=resubmit(,61)
   * table=60, n_packets=23697, n_bytes=1230474, priority=4,in_port="patch-tun" actions=resubmit(,61)
   * table=61, n_packets=2713148, n_bytes=800997718, priority=0 actions=resubmit(,62)

  These flows are initialized in the function
  install_ingress_direct_goto_flows(), and this function is only called
  in the constructor of the class OVSNeutronAgent. So when ovs_status
  equals constants.OVS_RESTARTED and flows need to be regenerated, but
  this function is not called and these flows are not regenerated.

  In order to solve this problem, we need to additionally restart ovs-
  neutron-agent to call install_ingress_direct_goto_flows() to
  regenerate these flows.

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