Weekend Learning: InfiniBand interfaces

Are you running InfiniBand devices with your Oracle infrastructure?  Do you want to know a bit more about it, and problems that can arise?  Of course you do!  Look no further than My Oracle Support note "InfiniBand IPoIB Interfaces Down and IBSTAT Reports HCA Ports in INITIALIZING State" via document ID 1950483.1 which sounds a LOT like an issue we had with InfiniBand interfaces a few months ago, so I wonder if this is based off of our case!  Have you ever used the ibstat command?  Do you monitor /var/log/messages for potential issues?