NMS LAB4

WEB based SNMP monitoring with MRTG

Basic SNMP config to router Allow SNMP only from server computer

MRTG

Free easy to use to monitor few router interfaces With many routers and switches some other tool

might be better (cacti etc)

MRTG Multi Router Traffic Grapher

Easy to use www-based router interface traffic grapher (Config creator creates ready interface monitoring config)

Can be used to graph other SNMP variables as well

Requirements

Server with: WWW-server (Apache installed on server

computer) Www-root c:\program files\apache

Perl (Active Perl installed on server computer) MRTG .zip package from

http://people.ee.ethz.ch/~oetiker/webtools/mrtg/pub/ (Check c:\downloads)

MRTG Usage Unzip mrtg to c:\temp\mrtg (If directory exist delete

it)

Use configmaker to create initial config from SNMP-device (perl configmaker in Windows) (Workdir to www-servers webroot/mrtg -folder (Remember to create folder)

Edit config (Check workdir and options)

Use MRTG to create graphs from config (perl mrtg config.conf

Use indexmaker to create nice index-page (perl indexmaker)

Needed options and commandline parameters are in mrtg:s documentation

MRTG ALLWAYS MONITORS TWO VALUES Normally traffic in / traffic out

MRTG conf (1 interface)### Interface 1 >> Descr: 'Cisco-PIX-Security-Appliance-'outside'-interface' | Name: 'outside' | Ip: '194.100.201.110' | Eth: '00-06-53-36-83-c9' ###

Target[192.168.254.254_1]: 1:communityhere@192.168.254.254:SetEnv[192.168.254.254_1]: MRTG_INT_IP="194.100.201.110" MRTG_INT_DESCR="Cisco-PIX-Security-Appliance-'outside'-interface"MaxBytes[192.168.254.254_1]: 12500000Title[192.168.254.254_1]: Traffic Analysis for EVTEK Internet connectionPageTop[192.168.254.254_1]: <H1>Traffic Analysis for EVTEK Internet connection</H1> <TABLE> <TR><TD>System:</TD> <TD>pix.evtek.fi in Espoo-konehuone</TD></TR> <TR><TD>Maintainer:</TD> <TD>heldepsk@evtek.fi</TD></TR> <TR><TD>Description:</TD><TD>Cisco-PIX-Security-Appliance-'outside'-interface </TD></TR> <TR><TD>ifType:</TD> <TD>ethernetCsmacd (6)</TD></TR> <TR><TD>ifName:</TD> <TD>outside</TD></TR> <TR><TD>Max Speed:</TD> <TD>100.0 Mbits/s</TD></TR> <TR><TD>Ip:</TD> <TD>XXX.XXX.XXX.XXX</TD></TR> </TABLE>

Unique identifierKey word

All this is needed to monitor 2

SNMP variables

Community

Router IP

MRTG

More information on web http://oss.oetiker.ch/mrtg/ http://oss.oetiker.ch/mrtg/doc/index.en.html