Need some help plotting specialized interfaces

[Bombe]

I have a VPN concentrator that I'd like to plot some specific users on. When they log in a virtual interface is spawned with their userid name as the interface name. The problem is the interface index number changes.

I can see them in the interface query, but If I plot the interface, whoever has that index number shows up in the plot. I'd like to query by interface name rather than index number.

Is this possible just using standard queries? Would I need to write some form of custom script? Has anyone done this previously and would be willing to share how?

[gandalf]

Please copy the XML file. Then change the index so it points to interface description instead of interface index. Find some more help at the first link of my signature (when scrolling down some chapters to SNMP DATA Query stuff)
Reinhard