/**
* @brief Add/delete address to NAT64 pool.
*
- * @param thread_index Thread index.
+ * @param thread_index Thread index used by ipfix nat logging (not address per thread).
* @param addr IPv4 address.
* @param vrf_id VRF id of tenant, ~0 means independent of VRF.
* @param is_add 1 if add, 0 if delete.