first meeting

where we are going

_________________________________________
Network caping - Steve Evanchik

dorm machine klepto.woodstock.clarkson.edu
vs
science center machine sokocalo.sc.clarkson.edu

on each
traceroute www.rit.edu 
and 
ping www.rit.edu  (shows packet loss on dorm net)

on dorm machine - same round trip but dropped packets

1) CAPING
unlimited download but outgoing is capped for
  dorms and public labs  

the way caping works is router drops packets from you
to keep you under the cap


caping done for all of dormnet - not per machine

caping upstream still interferers with TCP session
- slows it down - because acks get dropped

Tomorrow CIS wil have information session
  factual presentation in 10 minutes


2) trouble with applied theory


3) 100 Mbit vs Gigabit

on townshouses and woodstock are on 100 Mbit Ethernet

everyone else gigabit ethernet




priorities

private offices/labs

public labs ( don't want people doing "ping atttacks" on NASA
FBI was already heer for that once

dormnet - lowest priority - don't want students hosting
NAPSTER or porn servers


COSI lab is on dormnet

ITL lab?
_________________________________________________________________

did a traceroute of Clarkson's outgoing connection

through applied theory



also dynamic dns is broken

if request a host name can't  get it posted to the 
dynamic DNS

if you had if a hostname on a lease acquired before it
got broken you can keep it - alreayd posted to
dynamic DNS server- but no new ones

not NApster, Nutella


________________________________________________________________

MRTG

Multi Router Traffic Grapher

C and Perl, OPen source

graph data gathered through SNMP

SNMP - ismple network management protocol

machine exports certain things called MIBs (Managment Information Base)

Ex.   MIB for interfaces on this machine or CPU type or amount of memory

MRTG uses an SNMP library to talk to various pieces of hardware

of course if can't get to something at all hard to see what is wrong

only for NT/2000 or Linux, need Perl

then need a piece of hardware to monitor - something exporting a MIB

to monitor something
know its hostname or IP address plus its SNMP port (if non standard)
also need to know ID of the resource you want to monitor
then need an account/password for the SNMP community on that device 
a standard read only account is public


at command prompt 
perl cfgmaker public@hill.gw.clarkson.edu --global "Workdir:C:\labbuild\www\mrtg" --output mrtg.cfg

public@hill.gw.clarkson.edu  = waht I want to monitor
Workdir = where everything (graphs etc) gets generated
--global - put it the global section of the configuraiton file

--output mrtg.conf
 name of file to put configuraiton in

once generate configuration file then run MRTG with the mrtg.cfg
"perl mrtg mrtg.cfg"

SNMP 

machines of course don't have to enable SNMP - but default
is to have a read-only account public and most people
don't disable


MRTG can also be used to monitor your own machine stuff but not
export it by SNMP

can do MRTG and querty your own SNMP port
but can also just use MRTG without any SNMP 

Clarkson's real MRTG generated pages
noc.clarkson.edu/
can get campus summary, dorm net, individiual machine

see cap go up!

_____________________________________________________________
trial of HP Open View - real product is $30K

other product like that
Tivoli NetView
________________________________________________________________


Let everyone do an ETHEREAL CAPTURE

and go around and answer questions

_______________________________________________________________


SUGGESTION FOR NETWORK CLUB ACTIVITEIS

- coherent arguements about how to upgrade
	Clarkson;e networks

- monitor each switch and router and assemble whole picture
  with MRTG  - explain strange traffic patterns all over campus

- network local high schools/businesses

- tour machine rooms/network closets

- Charles Cameron visit - local NOC

- Fluke Network Analyzer and Multimeter






__________________________________________


more meetings tentative schedule

Tueasdy, 11-5-01
    4-6 HW lab, Fluke and Multimeter
    6:30  more howtos

Tuesday, 12-04-01
    4-6 Management lab 	(MRTG on routers in this lab)
	  HP open view
          cheops
	  web interface on router
    6:30 more howtos