DAPL 2.0 support was added in Intel MPI Library 3.2. I would suggest you updgrade by visiting the Intel Registration Center. Here are instructions on how to do that with a valid license. The latest version available is Intel MPI Library 3.2 Update 2.
Or, your other option is to simply select the OpenIB driver that implements DAPL 1.2, and not the one using DAPL 2.0. Do you have any entries in your dat.conf which include either "u1.2" or "dapl.1.2"? If yes, you can go ahead and use those instead via the
I_MPI_DEVICE env variable (as described in Dmitry's post).
Let us know how this helps.