Bandwidth Usage on Statistics tab wrong

[cryptic]

I am finding some serious discrepancies in how ISPConfig is reporting total bandwidth usage for a server per month and my total bandwidth is reported in Cacti per month.

This is for ISPConfig 2.2.27.

For example, on one server, under Reseller > $Name > Statistics tab, ISPconfig is reporting 27,695 MB total usage for March 2011. My Total Bandwidth graph in Cacti is showing 81,940 MB for March 2011.

I assume Cacti is the most accurate as it's measuring bandwidth form the network card on the server. However, I'm confused by the massive differences in the totals.

[till]

Thats normal, as cactoy measures the bandwidth on the network interface while ispconfig uses the logfiles of the apache, ftp and email daemons.