Comment 11 for bug 1813715

Reviewed: https://review.openstack.org/645405
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=cc49ab550179bdc76d79f48be67886681cb43d4e
Submitter: Zuul
Branch: stable/rocky

commit cc49ab550179bdc76d79f48be67886681cb43d4e
Author: LIU Yulong <email address hidden>
Date: Mon Mar 4 21:17:20 2019 +0800

    More accurate agent restart state transfer

    Ovs-agent can be very time-consuming in handling a large number
    of ports. At this point, the ovs-agent status report may have
    exceeded the set timeout value. Some flows updating operations
    will not be triggerred. This results in flows loss during agent
    restart, especially for hosts to hosts of vxlan tunnel flow.

    This fix will let the ovs-agent explicitly, in the first rpc loop,
    indicate that the status is restarted. Then l2pop will be required
    to update fdb entries.

    Conflicts:
     neutron/plugins/ml2/rpc.py

    Closes-Bug: #1813703
    Closes-Bug: #1813714
    Closes-Bug: #1813715
    Closes-Bug: #1794991
    Closes-Bug: #1799178

    Change-Id: I8edc2deb509216add1fb21e1893f1c17dda80961
    (cherry picked from commit a5244d6d44d2b66de27dc77efa7830fa657260be)