Multi-Lane layer of OpenFibre (ECSS-E-ST-50-11C clause 5.6) for 1 to 4 lanes: lane manager with unidirectional and
hot redundant lanes (ML-1), row distributor (ML-2), column codec with data scrambling and the data frame CRC-16 per
lane (ML-3, ML-4), lane alignment (ML-5) and row concentrator (ML-6). With one lane it is the Multi-Lane bypass of
ECSS 5.6.3.
Multi-lane link testbench (2 and 4 lanes, tb/vunit_config.py): traffic generator at row level, monitors of the received rows and of the words on the lanes