kv.key[2] = sm_key.as_u64[2];
if (clib_bihash_add_del_24_8 (&nm->sm_e, &kv, 0))
nat_elog_warn ("nat66-static-map-by-external delete key failed");
kv.key[2] = sm_key.as_u64[2];
if (clib_bihash_add_del_24_8 (&nm->sm_e, &kv, 0))
nat_elog_warn ("nat66-static-map-by-external delete key failed");