Comment 5 for bug 1501459

this is the same error but under other condition:
- original problem was connected with bad ordering
- current is connected with merged patch https://review.openstack.org/#/c/195765/

if you take any ISO after the patch https://review.openstack.org/231017 was merged and before https://review.openstack.org/#/c/195765/ you will not catch this error

So the root cause of current error is that now we disabled/enabled hotplug during network configuration and bridge is created, ip address is configured but it DOES NOT have any port when we ping default gateway. ( ports to bridge we add later)

Here is order

Notice: add-br(br-fw-admin) -> endpoint(br-fw-admin) -> add-br(br-mgmt) -> endpoint(br-mgmt) -> add-br(br-storage) -> endpoint(br-storage) -> add-br(br-ex) -> endpoint(br-ex) -> add-br(br-floating) -> endpoint(br-floating) -> add-patch(patch__br-ex--br-floating) -> add-br(br-prv) -> endpoint(br-prv) -> add-patch(patch__br-fw-admin--br-prv) -> add-port(eth0) -> add-port(eth0.101) -> add-port(eth0.102) -> add-port(eth1)