freebsd-ports/net/pathchar/files

Pathchar finds bandwidth, delay, average queue and loss rate
of hops between source and destination.

This tool, written by Van Jacobson (author of traceroute), is
alpha quality. Source code is not available.

Command line arguments
	-a:
	-A:
	-d:
	-D: filename for debug output
	-f: initial hop #
	-F: probefilter
	-i: intersampletime
	-l: max ttl
	-L: locality
	-m: maxsize maximum packet size in bytes
	(if absent, pathchar determines path MTU)
	-M: minsize default: smallest possible
	(want large differential between max and min size,
	o/w a node w/queue will impact later nodes )
	-n: don't dns-resolve
	-p: port @@?
	-q: #queries, default 32
	-Q: bytes,
	if (-), packet size increment per query, defaults to 92.
	if (+), number of sizes, defaults to 32
	-s: lsrr?
	-S: fit spacing
	-t: tos
	-v: verbose mode
	-V: verbose?
	-w: seconds wait time

"Please report problems to pathchar@ee.lbl.gov.  But please
don't ask questions -- if it doesn't make sense, wait for the
beta release.  Thanks.  Have fun."

http://www.caida.org/Pathchar/