Basically, you need to use your scheduler of choice (eg, cron) to run the rrd-archive perl script nightly. This makes an archived copy of the RRD files which is picked up on by Routers2; the archived copies are pruned according to options in the routers2.conf and/or MRTG cfg files.
Additional documentation on this is in the rrd-archive.txt file in the same directory, and of course in the Statistics: Posted by stevesh — Thu Jan 13, 2011 9:43 am
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