Comment 5 for bug 1607412

Sorry my previous comment is not helpful.

Looks like this error appears somewhere here:

2016-07-25 10:24:49.249 31572 DEBUG neutron.api.v2.base [req-d96c687a-3971-4d8d-bb42-08661632f7c8 neutron -] Request body: {u'port': {u'binding:host_id': u'ubuntu-trusty-2-node-rax-ord-2845415-108069', u'admin_state_up': True, u'network_id': u'946228d2-a787-45cb-838a-c410c48d3abc', u'dns_name': u'tempest.common.compute-instance-1749815685', u'device_owner': u'compute:None', u'tenant_id': u'17e7b0b74a024e318ffca20f138840a7', u'security_groups': [u'fdd02c2b-accc-4f11-b537-dab57823c674'], u'device_id': u'f0e2b7fc-d88a-4e2d-9bc8-adcb81efc0dc'}} prepare_request_body /opt/stack/new/neutron/neutron/api/v2/base.py:649
2016-07-25 10:24:49.249 31572 INFO neutron.api.v2.resource [req-d96c687a-3971-4d8d-bb42-08661632f7c8 neutron -] create failed (client error): Unrecognized attribute(s) 'dns_name'

http://logs.openstack.org/62/324262/3/gate/gate-grenade-dsvm-neutron-multinode/9af98c8/logs/new/screen-q-svc.txt.gz#_2016-07-25_10_24_49_249