Looks like there is a limitation in NSX Manager which does not allow to change logical port state.
Snippet from neutron-server.log:
...
2016-10-18 14:56:22.716 6960 ERROR neutron.api.v2.resource ManagerError: Unexpected error from backend manager (['172.16.0.249']) for PUT api/v1/logical-ports/3879d6fd-8b21-4b22-a184-2f92a4b26936 : admin_status DOWN is not supported for Lo
gical port attached to a Logical Router Port or a Bridge Endpoint. LogicalPort id : 3879d6fd-8b21-4b22-a184-2f92a4b26936
Looks like there is a limitation in NSX Manager which does not allow to change logical port state.
Snippet from neutron-server.log: api.v2. resource ManagerError: Unexpected error from backend manager (['172.16.0.249']) for PUT api/v1/ logical- ports/3879d6fd- 8b21-4b22- a184-2f92a4b269 36 : admin_status DOWN is not supported for Lo 8b21-4b22- a184-2f92a4b269 36
...
2016-10-18 14:56:22.716 6960 ERROR neutron.
gical port attached to a Logical Router Port or a Bridge Endpoint. LogicalPort id : 3879d6fd-