Oracle Solaris 11.4 Tunable Parameters Reference Manual Internet Protocol Suite Tunable Parameters SCTP Tunable Parameters _rto_initial Parameter _rto_initial Parameter Description Controls the initial retransmission timeout (RTO) in milliseconds for all the destination addresses of the peer. Default 3,000 Range 1,000 to 60,000,000 Dynamic? Yes When to Change Refer to RFC 2960, section 6.3.1. Commitment Level Unstable