Comment 3 for bug 1654179

R4.1 + OSPD10

same situation

Traceback (most recent call last):
  File "tempest/api/network/test_networks.py", line 593, in test_create_delete_subnet_with_v6_attributes_slaac
    ipv6_address_mode='slaac')
  File "tempest/api/network/test_networks.py", line 169, in _create_verify_delete_subnet
    self._compare_resource_attrs(subnet, compare_args)
  File "tempest/api/network/test_networks.py", line 141, in _compare_resource_attrs
    expected, exclude_keys))
  File "/usr/lib/python2.7/site-packages/testtools/testcase.py", line 435, in assertThat
    raise mismatch_error
testtools.matchers._impl.MismatchError: Differences:
  ipv6_ra_mode: expected slaac, actual None
  ipv6_address_mode: expected slaac, actual None