Comment 26 for bug 1457478

I tested by myself below configuration
All - Neutron + VLAN
All on the same host:
  anastasia@anastasia-X9SRE-X9SRE-3F-X9SRi-X9SRi-3F:~$ uname -r
  3.13.0-53-generic
  anastasia@anastasia-X9SRE-X9SRE-3F-X9SRi-X9SRi-3F:~$ lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description: Ubuntu 14.04.2 LTS
  Release: 14.04
 C odename: trusty

Oracle VM VirtualBox Manager 4.3.28
All used the same virtualbox networks
interface driver - e1000
OpenVswitch version: 2.3.1

All env:
Admin and Public - untagged
Management - tagged 101
Storage - tagged 102

Fuel ISO
  release: "6.1"
  openstack_version: "2014.2.2-6.1"
  api: "1.0"
  build_number: "471"
  build_id: "2015-05-26_20-59-56"

1. Centos, admin and private on eth0 -- network verification failed and private traffic dosn't go
2. Ubuntu, admin and private on eth0 - all is ok
3. Centos with fedora kernel (3.10), admin and private on eth0 -- all is ok!!!
4. Centos all network by default, public on eth1, all other networks on eth0 -- all is ok
5. Centos, public and private on eth1, all other on eth0

As we see we have just problem with default kernel and if private network is on interface which has untagged networks
tests 1,5
If interface except private network has any tagged network (test 4) -- all is ok

So we can say that we have problem only with default Centos kernel and only on VirtualBox