Frame-Relay & MRTG

[StarTAC]

hey guys...

i am providing a frame relay service, and i want to be able to use MRTG to monitor my client links, but i don't want to poll the customer router.. i want to poll a sub-interface on my router at the NOC...

however, in my current.. i am only providing a single IP to my client, which is what i want to maintain.... i use the "frame relay map ip x.x.x.x DLCI" command on my serial interface.... creating sub-interfaces would mean providing point to point IP addresses... for forwarding packets from my network...

i have somewhat figured a way of still keeping my single IP addressing scheme, but at the same time using sub-interfaces, but i need your confirmation...

i maintain my numbered serial interface, but create un-numbered sub-interfaces, each with a rule that says "frame relay map ip x.x.x.x DLCI"... then i overload that un-numbered sub-interface to the main serial interface....

on the client end, i configure routine frame relay setup and commands, and make his default route the IP address of my main serial interface...

this way, i give the client one IP address, but maintain sub-interfaces for my MRTG queries...

will this work...?..

all help appreciated...