Oracle Solaris 11.4 Tunable Parameters Reference Manual Internet Protocol Suite Tunable Parameters SCTP Tunable Parameters _pp_max_retr Parameter _pp_max_retr Parameter Description Controls the maximum number of retransmissions over a specific path. When this number is exceeded for a path, the path (destination) is considered unreachable. Default 5 Range 1 to 128 Dynamic? Yes When to Change Do not change this value to less than 5. Commitment Level Unstable