[e2e] pchar-1.3 available
Bruce A. Mah
bmah at cisco.com
Thu Jan 25 10:08:05 PST 2001
I'm most pleased to announce the release of pchar-1.3, a utility for
characterizing the individual links along a path between two network
pchar has been tested on various versions of FreeBSD, NetBSD, OpenBSD,
Linux, Solaris, OSF/1, and IRIX, with the primary development on
FreeBSD and Solaris. pchar is written is C++, primarily using recent
versions of gcc, but with some testing also on the SparcWorks C++
compiler. pchar supports IPv4 and, where applicable, IPv6.
Recent additions to pchar include: New analysis algorithms based on
the least median of squares linear fit method, new probe types (ICMP
and ICMPv6), the ability to set the outgoing interface of probes, and
a new "tiny traceroute" mode. A number of bugs have been fixed as
well; most notably, IPv6 probes will now return (more) correct values
for the last hop of a path. The CHANGES file included in the pchar
distribution provides more details.
The file format used for tracefiles has changed, unfortunately in an
incompatable way. Files from pchar-1.2 and earlier are incompatible
with pchar-1.3 and vice versa. Conversion between file formats is a
possibility, but has not been implemented yet.
More information, as well as downloadable source code, can be found at:
Questions and comments are welcome, and can be emailed to
<bmah at cisco.com> or <bmah at acm.org>.
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