<listitem><para>Takes time (in seconds) as argument between individual keepalive probes,
if the socket option SO_KEEPALIVE has been set on this socket seconds as argument.
This controls the TCP_KEEPINTVL socket option (see
<listitem><para>Takes time (in seconds) as argument between individual keepalive probes,
if the socket option SO_KEEPALIVE has been set on this socket seconds as argument.
This controls the TCP_KEEPINTVL socket option (see