Excluding network interfaces from RRD graphs?

Shire-folk:

In Hobbit 4.2, the bandwidth for my system interfaces is now being tracked and graphed! Yes! But some of my servers have a bit list of interfaces that I do not want to track (wrsmd<nn>)...

So, is there a way to exclude network interfaces from the list, like you can exclude disks from the disk graphs?

And, is there a way to tag each interface with something descriptive, such as "eri0=Backup". Etc.

I didn't see any of this in the docs, or in the configuration files...but it could still be there...

GLH