How to relate rrdfile name with router interface name?

[joe_hznm]

I want to get interface traffic data from rrd files updated by cacti. But, I don't know how to determine the rrd file name which stores data of special interface.

Is there a way to do it?

Joe

[gandalf]

This can only be done by following the structure of the mysql tables; there's no supported interface to that. As a start, check http://www.cacti.net/downloads/docs/sql/ for table docs
Reinhard