Oracle Solaris 11.4 Tunable Parameters Reference Manual Internet Protocol Suite Tunable Parameters SCTP Tunable Parameters _rto_max Parameter _rto_max Parameter Description Controls the upper bound for the retransmission timeout (RTO) in milliseconds for all the destination addresses of the peer. Default 60,000 Range 1,000 to 60,000,000 Dynamic? Yes When to Change Refer to RFC 2960, section 6.3.1. Commitment Level Unstable