Comment 11 for bug 1804842

Reviewed: https://review.openstack.org/623503
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=fccc786fd572e4ce3bfd421ac3b1da7e7f31480b
Submitter: Zuul
Branch: stable/pike

commit fccc786fd572e4ce3bfd421ac3b1da7e7f31480b
Author: Slawek Kaplonski <email address hidden>
Date: Wed Nov 28 22:42:18 2018 +0100

    Force all fdb entries update after ovs-vswitchd restart

    When ovs-vswitchd process is restarted neutron-ovs-agent will
    handle it and reconfigure all ports and openflows in bridges.
    Unfortunatelly when tunnel networks are used together with
    L2pop mechanism driver, this driver will not notice that agent
    lost all openflow config and will not send all fdb entries which
    should be added on host.

    In such case L2pop mechanism driver should behave in same way like
    when neutron-ovs-agent is restarted and send all fdb_entries to
    agent.

    This patch adds "simulate" of agent start flag when ovs_restart is
    handled thus neutron-server will send all fdb_entries to agent and
    tunnels openflow rules can be reconfigured properly.

    Change-Id: I5f1471e20bbad90c4cdcbc6c06d3a4412db55b2a
    Closes-bug: #1804842
    (cherry picked from commit ae031d18866a9e3652f4fc122f120915209a7b29)