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routers2 makes a number of assumptions about the .rrd files, specifically in the type and length of RRAs and the names of the DSs. This is because it expects the RRD to have been created by MRTG.
You could use routers2 to graph data collected by other applications (we do this here) but you would need a dummy .cfg file for the RRD (so that routers2 can know how to display it) and it would have to conform to MRTG standards.
The new prediction RRAs available in RRDTool 1.2 are very interesting, and I'm going to be looking at adding them to standard routers2. However they are not added to a MRTG-created RRD by default, and you'd need to modify your RRD files to add this feature.
If you're a perl scripter, then the functions you should look at are make_graph (which does the parameters common to all graphs, such as time period), rtr_params (which does the parameters for a single target graph), and usr_params (which does the parameters for userdefined combination graphs). calc_percentile does the 95th percentile and total calculations, if required.
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Steve Shipway
UNIX Systems, ITSS, University of Auckland, NZ
Woe unto them that rise up early in the morning... -- Isaiah 5:11
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