Comment 15 for bug 1414559

Reviewed: https://review.openstack.org/246898
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=b7c303ee0a16a05c1fdb476dc7f4c7ca623a3f58
Submitter: Jenkins
Branch: master

commit b7c303ee0a16a05c1fdb476dc7f4c7ca623a3f58
Author: Oleg Bondarev <email address hidden>
Date: Wed Nov 18 12:15:09 2015 +0300

    Notify nova with network-vif-plugged in case of live migration

     - during live migration on pre migration step nova plugs instance
       vif device on the destination compute node;
     - L2 agent on destination host detects new device and requests device
       info from server;
     - server does not change port status since port is bound to another
       host (source host);
     - L2 agent processes device and sends update_device_up to server;
     - again server does not update status as port is bound to another host;

    Nova notifications are sent only in case port status change so in this case
    no notifications are sent.

    The fix is to explicitly notify nova if agent reports device up from a host
    other than port's current host.

    This is the fix on neutron side, the actual fix of the bug is on nova side:
    change-id Ib1cb9c2f6eb2f5ce6280c685ae44a691665b4e98

    Closes-Bug: #1414559
    Change-Id: Ifa919a9076a3cc2696688af3feadf8d7fa9e6fc2