Hi Alexey, > >> OK. Perhaps we should rename them to indicate that they relate to ns-icmpv_sender, > >> because the maximum icmp data size is 65535 - headers, not those values. > > True. How about this: > > export NS_ICMPV4_SENDER_DATA_MAXSIZE=1472 > > export NS_ICMPV6_SENDER_DATA_MAXSIZE=1452 > Agree. Thanks, merged! Kind regards, Petr