Comment 9 for bug 1561509

Verify on
[root@fuel ~]# shotgun2 short-report
cat /etc/fuel_build_id:
 389
cat /etc/fuel_build_number:
 389
cat /etc/fuel_release:
 9.0
cat /etc/fuel_openstack_version:
 mitaka-9.0
rpm -qa | egrep 'fuel|astute|network-checker|nailgun|packetary|shotgun':
 fuel-release-9.0.0-1.mos6346.noarch
 fuel-bootstrap-cli-9.0.0-1.mos282.noarch
 fuel-migrate-9.0.0-1.mos8378.noarch
 rubygem-astute-9.0.0-1.mos745.noarch
 fuel-misc-9.0.0-1.mos8378.noarch
 network-checker-9.0.0-1.mos72.x86_64
 fuel-mirror-9.0.0-1.mos136.noarch
 fuel-openstack-metadata-9.0.0-1.mos8693.noarch
 fuel-notify-9.0.0-1.mos8378.noarch
 nailgun-mcagents-9.0.0-1.mos745.noarch
 fuel-provisioning-scripts-9.0.0-1.mos8693.noarch
 python-fuelclient-9.0.0-1.mos315.noarch
 fuelmenu-9.0.0-1.mos270.noarch
 fuel-9.0.0-1.mos6346.noarch
 fuel-utils-9.0.0-1.mos8378.noarch
 fuel-setup-9.0.0-1.mos6346.noarch
 fuel-library9.0-9.0.0-1.mos8378.noarch
 shotgun-9.0.0-1.mos88.noarch
 fuel-agent-9.0.0-1.mos282.noarch
 fuel-ui-9.0.0-1.mos2696.noarch
 fuel-ostf-9.0.0-1.mos934.noarch
 python-packetary-9.0.0-1.mos136.noarch
 fuel-nailgun-9.0.0-1.mos8693.noarch
(neutron + vxlan + dvr)

Reproduced on 9.0 iso 134 (2016-03-30)

Steps to reproduce:
1) Create 10 nets, 10 routers, create 10 vms on 1 compute
2) Choose 1 vm and ping 8.8.8.8 from it
3) Restart l3 agent on compute with vms several times ( 23 is enough for reproducing, so for verifing I used 60 times)
4) Ping 8.8.8.8 is available