def get_dvr_mac_address_by_host(self, context, host):
        if not host:
            return

        try:
            return self._get_dvr_mac_address_by_host(context, host)
        except ext_dvr.DVRMacAddressNotFound:
            return self._create_dvr_mac_address(context, host)
Determine the MAC for the DVR port associated to host.
dataset/ETHPy150Open openstack/neutron/neutron/db/dvr_mac_db.py/DVRDbMixin.get_dvr_mac_address_by_host