MRTG: Basic Traffic Measurement AfNOG / Rabat 2008.05.30 Mark Tinka Michuki Mwangi.

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Presentation transcript:

MRTG: Basic Traffic Measurement AfNOG / Rabat Mark Tinka Michuki Mwangi

AfNOG NFSEN 2 My Border Links

AfNOG NFSEN 3 Measure Hosts by Using Switch

AfNOG NFSEN 4 Some Internals & a Service Not an Interface This is a Service The Exim Spool

AfNOG NFSEN 5 How Did we do This?

AfNOG NFSEN 6 MRTG Config File # cat /usr/local/etc/mrtg/mrtg.cfg WorkDir: /usr/local/www/share/rg WriteExpires: Yes #RunAsDaemon: Yes Interval: 5 Options[_]: growright, bits, unknaszero Timezone[_]: GMT WithPeak[_]: wmy

AfNOG NFSEN 7 Target[psg1.1]: RouterUptime[psg1.1]: MaxBytes[psg1.1]: Title[psg1.1]: 0.1 psg1 sprint transit serial PageTop[psg1.1]: [psg1.1] psg1 sprint transit System: psg1 - Juniper M5 Maintainer: Randy Bush Interface: t1-0/1/2.0 IP: Max Speed: 155Mb/sec (OC3c) One Devices Config

AfNOG NFSEN 8 Target[psg.e]: `ssh -i $MRTGmrtg-scr do-exim-mrtg` Options[psg.e]: growright, unknaszero, gauge MaxBytes[psg.e]: Title[psg.e]: psg.psg.com mail queue PageTop[psg.e]: [psg.e] psg.psg.com mail queue System: psg.psg.com - Exim Maintainer: Randy Bush Application: Exim MTA Input: spool Kb/10 Ouput: messages Custom Measure, Not an Interface

AfNOG NFSEN 9 psg.com:/usr/local/bin# cat do-exim-mrtg #!/bin/sh # input = size of spool # /bin/expr \ `/usr/bin/du -s /var/spool/exim/input \ | /usr/bin/awk '{print $1}'` / 10 # output = number of messages in queue # /usr/local/sbin/exim -bpc # pseudo-uptime # /bin/ps -auxww \ | /usr/bin/grep exim \ | /usr/bin/head -1 \ | /usr/bin/awk '{print $9}' echo

AfNOG NFSEN 10 How to Get Config Data Automatically ! MRTG comes with a program to fetch data from SNMP-speaker and produce layout ready for /usr/local/etc/mrtg/mrtg.cfg #

AfNOG NFSEN 11 Target[switch1_1]: SetEnv[switch1_1]: IP=" " DESCR="Ethert-Port-on-unit-1,-port:1" MaxBytes[switch1_1]: Title[switch1_1]: Traffic Analysis for 1 -- PageTop[switch1_1]: Traffic Analysis for 1 -- System: in Westin 18-C2 - Seattle WA US Maintainer: Randy Bush Description: EtherNet-Port-on-unit-1,-port:1 ifType: ethernetCsmacd (6) ifName: Port1 Max Speed: MBytes/s Ip: (switch1.psg.com)

AfNOG NFSEN 12 Making the Web Page You have mrtg.cfg You have MRTG running every 5 mins You want to make the web page # indexmaker mrtg.cfg > \ /usr/local/www/data/mrtg.html And that’s it!