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TCPRTT(8)		    System Manager's Manual		     TCPRTT(8)

NAME
       tcprtt -- measure TCP handshake RTT using the stats(3) framework

SYNOPSIS
       tcprtt [-f] host	port

DESCRIPTION
       The  tcprtt utility reliably measures the TCP handshake round trip time
       using the stats(3) statistics framework.

       Both IPv4 and IPv6 are supported.  If the host argument is  a  hostname
       containing  several  A  and  AAAA  records, one line per	record will be
       printed.

       The options are as follows:

       -f      Stop after the first address of each family

       For each	address	measured, a line is printed with  3  columns:  address
       family  (4  or  6),  the	numerical address and the measured RTT in mil-
       liseconds.

       When an error occurs for	one  of	 the  measurement,  the	 -errno(2)  is
       printed in place	of the RTT.

       If  at  least  one  entry  returns an error, the	command	exits with the
       value of	the last encountered error.

SEE ALSO
       stats(3)

FreeBSD	ports 15.0		 June 20, 2019			     TCPRTT(8)

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<https://man.freebsd.org/cgi/man.cgi?query=tcprtt&sektion=8&manpath=FreeBSD+Ports+15.0>

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