I suppose it is one of things that actually distinguishes the IE2000 from the AB-Rockwell Stratix 5700 (When you Compare prices and you see IE2000 Support REP and Profnet/MRP, but Stratix 5700 replaces MRP with DLR).
Oh and you get Free SMARTNet from Rockwell >:}
Hopefully the next generation of Stratix switches will just be identical to the Cisco line.