Subject: ANNOUNCE: FlowScan-1.003 released
From: Dave Plonka (plonka@doit.wisc.edu)
Date: Fri Sep 15 2000 - 13:50:21 CDT
FlowScan users,
[Please see the "Changes in FlowScan-1.003" listed below.
The INSTALL document contains info on upgrading from 1.002.]
I'm pleased to announce the release of FlowScan-1.003. FlowScan
is a tool to monitor and graph flow information from Cisco
routers in "near" real-time.
Amonst many other things, FlowScan optionally measures and
graphs traffic for applications such as Napster. A sample of
what FlowScan can do is at:
http://wwwstats.net.wisc.edu
Changes in FlowScan-1.003
* Updated INSTALL documentation and bug fixes to installation
process based on trouble spots identified by various users.
* Added the identification and measurement of PASV-mode ftp data
traffic to CampusIO report. This is now combined with the
"normal" ftp-data traffic and is labeled "FTP DATA" in the
graphs.
* Updated Napster config for CampusIO report so that Napster
traffic will continue to be measured even though Napster.com
has moved to another service-provider network/subnet.
* Added the ability for CampusIO report to identify outbound flows
by ifIndex number rather than just next-hop IP address. This
is applicable for institutions that simply default route
outbound traffic to an "ip unnumbered" interface on the
border router.
* Bug fix so that flowscan properly handles transition from
Daylight Savings Time in fall, when the same hour of day
will occur twice for most American users. This also includes
a fix so that FlowScan understands the timezone info that is
put in the raw flow file names by cflowd when patched with
my current cflowd patch and updates the RRD files
accordingly.
* Fixed compatibility of CampusIO and SubNetIO reports with the
current Boulder perl modules from CPAN.
* Bug fix to the graphs.mf Makefile for CampusIO report to support
current rrdtool graph argument syntax.
* Bug fix so that CampusIO report will not try to identify Napster
flows if the user has not configured it to do so.
* Bug fix to CampusIO report so that it counts multicast traffic
properly.
* Bug fix to CampusIO report so that it will create RRD files
regardless of whether or not traffic was seen for the give
service. Previously the graphs Makefile would fail in
environments where some kinds of traffic didn't exists, such
as ftp-data or NNTP.
* Added the ability to preserver NapUser, NapUserMaybe, and
ftpPASV flows to raw flow files in a directory of their own
to facilitate research and debugging.
Availability
FlowScan is licensed under the GNU General Public License, and
is available to you at:
http://net.doit.wisc.edu/~plonka/FlowScan/
Mailing Lists
There are two mailing lists having to do with FlowScan:
* flowscan
a general mailing list for FlowScan users.
* flowscan-announce
a low-volume, restricted post mailing list to keep FlowScan
users informed of news regarding FlowScan.
The lists' respective archives are available at:
http://net.doit.wisc.edu/~plonka/list/flowscan
and:
http://net.doit.wisc.edu/~plonka/list/flowscan-announce
Announcements will be "cross-posted" to both lists, so there's
no need to join both.
These lists are hosted by the Division of Information
Technology's Network Engineering Technology group at the
University of Wisconsin - Madison. To subscribe to either of
them, send email to:
majordomo@net.doit.wisc.edu
containing either:
subscribe flowscan
*or*:
subscribe flowscan-announce
You should receive an automatic response that will request that
you verify your request to become a member of the list, to which
you must reply with the authentication information there-in.
Then, in response to your reply, you should receive a welcome
message. If you have any questions about the administrative
policies of this list's manager, please contact:
owner-flowscan@net.doit.wisc.edu
*or*:
owner-flowscan-announce@net.doit.wisc.edu
Napster
If you're interested in Napster specifically, note the graph
labeled "Well Known Services Mb/s" here:
http://wwwstats.net.wisc.edu
or, directly, here:
http://wwwstats.net.wisc.edu/CampusIO/services_Mbps.gif
I have written a general document about the Napster portion of
the measurement at:
http://net.doit.wisc.edu/data/Napster/
Some related research on Napster flows is at:
http://net.doit.wisc.edu/data/flow/size/
Thanks
I'd like to thank the FlowScan beta testers (since September
1999), early users, and participants in the FlowScan mailing
list for their efforts and feedback.
Also, thanks to Daniel McRobb, Tobi Oetiker, and CAIDA for
providing the main tools upon which FlowScan is built, namely
"cflowd" and "RRDTOOL".
Copyright and Disclaimer
Note that this document is provided `as is'. The information
in it is not warranted to be correct. Use it at your own
risk.
Copyright (c) 2000 Dave Plonka <plonka@doit.wisc.edu>.
All rights reserved.
This document may be reproduced and distributed in its
entirety (including this authorship, copyright, and
permission notice), provided that no charge is made for the
document itself.
--
plonka@doit.wisc.edu http://net.doit.wisc.edu/~plonka ARS:N9HZF Madison, WI
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