Comment 25 for bug 1489198

Reviewed: https://review.fuel-infra.org/11072
Submitter: Vitaly Sedelnik <email address hidden>
Branch: openstack-ci/fuel-6.1/2014.2

Commit: 95fd30d477bec4a5f9ea1ffa21c3cd73ffc01003
Author: Oleg Bondarev <email address hidden>
Date: Mon Apr 25 17:33:05 2016

Live Migration: add sleep on pre live migration at destination

Sleep is needed to let neutron ovs agent handle new ports
and assign proper tags to not block RARP packets sent by qemu
right after migration. Only side effect is more time needed for
live migration. Positive effect however is less packet loss.
Correct fix would be to leverage external event framework
and wait for neutron event about vif plugging. This will requre
changes on neutron side as well.
So it was decided to go with a simple safe fix for now.

Closes-Bug: #1489198
Change-Id: Id3200a675eaba30f086c91d050fb0e0d03b03027