[mrtg] Use of MRTG+RRD for LAN traffic analysis with one second interval

Prasad Kularatne kularatn at sg.ibm.com
Tue Oct 11 11:09:58 MEST 2005

Hi folks,
I am an IT Specialist working in IBM Sri Lanka.

I am currently doing a research to find out the sensitivity of Database 
and Web traffic to iSCSI traffic in a LAN environment. 

I do need a traffic analysis and graphing tool to peep through the TCP 
traffic behavior on my Cisco switch.

I am planning to use MRTG+RRD tool for this purpose.

The documentation I went through clearly indicates that MRTG along can 
only give me bandwidth utilization statistics in 5 minutes intervals and 
also Florin's "MRTG Implementation Manual" also indicates that even with 
RRD I can obtain only that granularity.

But some of my collegues were claiming that MRTG+RRD can allow me to do 
the traffic analysis with one second intervals.

Therefore I thought of resolving this with the person who wrote the tools. 

Can any one of you let me know whether the combination of the above tools 
allow me to capture and graph traffic statistics at one second intervals. 

As per Toby it required hacking the MRTG code. Have anyone of you done 

Very much appreciate your feedback. Thanks.

Good Luck!

K K I P Kularatne
IT Specialist
Team Leader - SSPS
Integrated Technology Services
IBM Sri Lanka
Phone: 94 11 2493546
Fax: 94 11 2434594
Internet Mail: kularatn at sg.ibm.com

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