Hi Serge,
Here are the answers:
1. it is for copper cables up to 2m in length and fiber optics up to 30m in length. Beyond that we have of course a superset of more capabilities (FEC and LLR) that being used as needed.
2. Today we have InfiniBand switches with 36-ports at the ASIC level, than can be used to build an unlimited size of a cluster. The newest switch, Switch-IB 2 is the world first smart switch that can manage and execute MPI collective operation on the switch ASIC. We will announce future solutions once they will become available.
Regards,
Gilad