[mrtg] How to graph a burstable pipe?

Scott Baker bakers at canbytel.com
Fri Jan 28 01:37:19 CET 2011

I have a pipe that's 600Mb/s but burstable up to 1Gb/s. Currently I have 
the graph set with maxbytes = 600Mb/s but if I go beyond that MRTG 
ignores the extra. If I the maxbytes to 1Gb/s the percentages are all 
based on a full 1Gb/s.

Ideally I'd like to graph with a soft limit of 600Mb/s and a hard upper 
limit of 1Gb/s. I'd like the percentage utilization to reflect the soft 
limit, perhaps even draw a vertical line on the graph at the soft limit. 
I'd like the graph to say that when I hit 700Mb/s that we're at 117% of 

Most of the decisions are based on the percentage of utilization so the 
more I can do to make that accurate the better. Any way I can do this 
with MRTG? I couldn't find anything super obvious in the documentation.

Scott Baker - Canby Telcom
System Administrator - RHCE - 503.266.8253

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