Multiple QPs for a single IPoIB Interface

Are there any problems with using multiple QPs for a single IPoIB 
"interface"?  I would like to use send queues for a single IPoIB "link", 
and the only way I can think to do this is to use multiple QPs.  On 
inbound, I would likely use one of the QPs for all traffic, although I 
guess I could theoretically use a different QP by changing the QPN on the 
ARP reply or Neighbor Advertisement.  The IPoIB specs talk about using a 
single QPN for the IPoIB link, but I really can't think of any reason why 
using multiple QPs wouldn't work.

Roy