Hi,

I'm still having the same issue, following the Liberty documentation online  http://docs.openstack.org/liberty/install-guide-rdo/launch-instance.html#create-virtual-networks

And when I setup the private subnet I have the following Warning followed by an error:

============>
2016-03-23 19:46:50.656 12893 WARNING neutron.plugins.ml2.drivers.l2pop.mech_driver [req-65351eeb-2e1c-4483-81c2-524bcf64c366 bf168041f9c5446b81bca4d737f547e7 a86464f29aac4ec5848fb481e6362fcb - - -] Unable to retrieve active L2 agent on host chavloli001
2016-03-23 19:46:50.867 12893 INFO neutron.wsgi [req-65351eeb-2e1c-4483-81c2-524bcf64c366 bf168041f9c5446b81bca4d737f547e7 a86464f29aac4ec5848fb481e6362fcb - - -] 10.123.35.173 - - [23/Mar/2016 19:46:50] "DELETE /v2.0/networks/d081a988-004a-4c72-bd54-7bb87cba2095.json HTTP/1.1" 204 173 0.335705
2016-03-23 19:46:56.942 12893 INFO neutron.wsgi [-] (12893) accepted ('10.123.35.173', 56377)
2016-03-23 19:46:57.000 12893 INFO neutron.plugins.ml2.db [req-601d0c61-6394-46b8-8459-11fe0dcb3976 bf168041f9c5446b81bca4d737f547e7 a86464f29aac4ec5848fb481e6362fcb - - -] Added segment e6c14ae5-e05d-49e8-902e-00d57736fe6e of type vxlan for network eac8b214-952b-4670-a53d-9f111327eb3e
2016-03-23 19:46:57.012 12893 INFO neutron.wsgi [req-601d0c61-6394-46b8-8459-11fe0dcb3976 bf168041f9c5446b81bca4d737f547e7 a86464f29aac4ec5848fb481e6362fcb - - -] 10.123.35.173 - - [23/Mar/2016 19:46:57] "POST /v2.0/networks.json HTTP/1.1" 201 590 0.068782
2016-03-23 19:47:08.783 12892 INFO neutron.wsgi [-] (12892) accepted ('10.123.35.173', 56380)
2016-03-23 19:47:08.825 12892 INFO neutron.wsgi [req-b0952284-a5dd-488e-997b-598f8b04b42c bf168041f9c5446b81bca4d737f547e7 a86464f29aac4ec5848fb481e6362fcb - - -] 10.123.35.173 - - [23/Mar/2016 19:47:08] "GET /v2.0/networks.json?fields=id&name=private HTTP/1.1" 200 275 0.041099
2016-03-23 19:47:08.927 12892 INFO neutron.wsgi [req-ec830fb4-1f0c-41d0-ae9d-6f3a8f54d140 bf168041f9c5446b81bca4d737f547e7 a86464f29aac4ec5848fb481e6362fcb - - -] 10.123.35.173 - - [23/Mar/2016 19:47:08] "POST /v2.0/subnets.json HTTP/1.1" 201 738 0.097313
2016-03-23 19:47:09.087 12894 ERROR neutron.plugins.ml2.managers [req-27a5c63e-3d3a-4383-992b-317b18a53faa - - - - -] Failed to bind port 3c2a5757-0765-4ac3-8552-c687709d9277 on host chavloli001
2016-03-23 19:47:09.087 12894 ERROR neutron.plugins.ml2.managers [req-27a5c63e-3d3a-4383-992b-317b18a53faa - - - - -] Failed to bind port 3c2a5757-0765-4ac3-8552-c687709d9277 on host chavloli001
2016-03-23 19:47:09.099 12894 INFO neutron.plugins.ml2.plugin [req-27a5c63e-3d3a-4383-992b-317b18a53faa - - - - -] Attempt 2 to bind port 3c2a5757-0765-4ac3-8552-c687709d9277
2016-03-23 19:47:11.229 12894 WARNING neutron.plugins.ml2.rpc [req-cf691abb-d90e-4b88-8c3c-5e8f5869db1f - - - - -] Device tap3c2a5757-07 requested by agent lb005056b23058 on network eac8b214-952b-4670-a53d-9f111327eb3e not bound, vif_type: binding_failed


======>
2016-03-23 20:14:55.009 16201 INFO neutron.plugins.ml2.drivers.type_vlan [-] VlanTypeDriver initialization complete
2016-03-23 20:14:55.009 16201 INFO neutron.plugins.ml2.managers [-] Initializing driver for type 'vxlan'
2016-03-23 20:14:55.010 16201 INFO neutron.plugins.ml2.drivers.type_tunnel [-] vxlan ID ranges: [(5, 1000)]
2016-03-23 20:14:55.027 16201 INFO neutron.plugins.ml2.managers [-] Initializing extension driver 'port_security'
2016-03-23 20:14:55.028 16201 INFO neutron.plugins.ml2.extensions.port_security [-] PortSecurityExtensionDriver initialization complete
2016-03-23 20:14:55.028 16201 INFO neutron.plugins.ml2.managers [-] Initializing mechanism driver 'linuxbridge'
2016-03-23 20:14:55.028 16201 INFO neutron.plugins.ml2.managers [-] Initializing mechanism driver 'l2population'
2016-03-23 20:14:55.028 16201 DEBUG neutron.plugins.ml2.drivers.l2pop.mech_driver [-] Experimental L2 population driver initialize /usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/l2pop/mech_driver.py:40
2016-03-23 20:14:55.030 16201 DEBUG neutron.plugins.ml2.plugin [req-df4a6124-e532-494d-b24b-151b0a568752 - - - - -] neutron.plugins.ml2.plugin.Ml2Plugin method _start_rpc_notifiers called with arguments () {} wrapper /usr/lib/python2.7/site-packages/oslo_log/helpers.py:45
2016-03-23 20:14:55.030 16201 INFO neutron.plugins.ml2.plugin [req-df4a6124-e532-494d-b24b-151b0a568752 - - - - -] Modular L2 Plugin initialization complete
2016-03-23 20:14:55.031 16201 DEBUG neutron.manager [req-df4a6124-e532-494d-b24b-151b0a568752 - - - - -] Loading services supported by the core plugin _load_services_from_core_plugin /usr/lib/python2.7/site-packages/neutron/manager.py:165


vxlan not working:
============>
2016-03-23 20:18:21.249 16218 DEBUG neutron.plugins.ml2.drivers.mech_agent [req-b16d9b42-e92c-4a6e-a82e-81db71d81d03 - - - - -] Network 76876363-9ca3-4e85-8ee7-936fe1b7dc23 is of type vxlan but agent chavloli001 or mechanism driver only support ['local', 'flat', 'vlan']. check_segment_for_agent /usr/lib/python2.7/site-packages/neutron/plugins/ml2/drivers/mech_agent.py:193
2016-03-23 20:18:21.249 16218 ERROR neutron.plugins.ml2.managers [req-b16d9b42-e92c-4a6e-a82e-81db71d81d03 - - - - -] Failed to bind port 098aed92-2b0f-4a22-be8d-16b1b6b27f31 on host chavloli001
2016-03-23 20:18:21.250 16218 ERROR neutron.plugins.ml2.managers [req-b16d9b42-e92c-4a6e-a82e-81db71d81d03 - - - - -] Failed to bind port 098aed92-2b0f-4a22-be8d-16b1b6b27f31 on host chavloli001


Version
=======
RHEL 7.2
python-neutronclient-3.1.0-1.el7.noarch
python-neutron-7.0.1-1.el7.noarch
openstack-neutron-7.0.1-1.el7.noarch
openstack-neutron-ml2-7.0.1-1.el7.noarch
openstack-neutron-common-7.0.1-1.el7.noarch
openstack-neutron-linuxbridge-7.0.1-1.el7.noarch