Hi,
This document states that there is no InfiniBand support in Standard Edition:
http://docs.oracle.com/cd/E11882_01/license.112/e47877/editions.htm#DBLIC116
But I'm able to start Standard Edition RAC 11.2.0.4 with either UDP over IB or RDS over IB as private interconnect.
So, what exactly does it mean that Standard Edition does not support IB?