Status of Infiniband network layer?

Hi folks;
  How functional is the current version of the Infiniband network layer? 
I recall some discussion about instabilities due to variations in vendor
implementations about a year ago, but I don't recall hearing anything
since.  We have enough Infiniband machines in house at this point that
it's become very relevant to us.

Thanks,
-Joel
 [email protected]


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