If set to 1, TCP always sends a SYN segment with the timestamp option. Note that if TCP receives a SYN segment with the timestamp option, TCP responds with a SYN segment with the timestamp option even if the parameter is set to 0.
0 (disabled)
0 (disabled) or 1 (enabled)
Yes
If getting an accurate measurement of round-trip time (RTT) and TCP sequence number wraparound is a problem, enable this parameter.
Refer to RFC 1323 for more reasons to enable this option.
Unstable