I installed Marco's A3818 PCIe card.  Didn't seem to work.  I got communication errors talking to link 2.  The
communication problems didn't happen right away, but happened once the run started.

I swapped the fibres going to port 2 and port 3 on the A3818.  The problem stayed with port 2.  So I conclude
that this A3818 module is no good.