def _delete_lla(self, router, lla_with_mask):
        if lla_with_mask and router['gw_interface']:
            try:
                self.intf_driver.delete_ipv6_addr(router['gw_interface'],
                                                  lla_with_mask,
                                                  router['ns_name'])
            except __HOLE__:
                # Ignore error if the lla doesn't exist
                pass
dataset/ETHPy150Open openstack/neutron/neutron/agent/linux/pd.py/PrefixDelegation._delete_lla