[mrtg] provisioning question for a new MRTG server

Diana Eichert deeiche at freeshell.org
Wed Jun 5 21:59:15 MEST 2002

I've been running several MRTG servers against several hundred Cisco network devices 
for a number of years, monitoring selected ports on Catalyst due to the sheer 
number of ports on the Cats.  We have almost eliminated all hubs in our network 

Management has recently gotten behind the use of modeling tools to plan for 
future network upgrades.  One of these tools can use real MRTG data to build the 
model.  They'd like to monitor all the Catalyst ports, over 10,000 right now, so 
when an enduser group comes in requesting a faster connection we will have longterm 
historical data to assist in planning.  Now we're looking at monitoring a much 
greater number of ports.

I've looked for documentation on sizing MRTG w/RRDTOOL on the web but haven't come 
up with anything, so far.  I believe that the largest limitation is disk IO because 
you have to read in, then write out each rrd file.

Opinions based on real experience is appreciated.  Pointers to URLs where this has 
discussed before is welcome also.


diana eichert

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