The high speed port parameters provide configuration and status for the CAUI physical coding sub-layer used by 40G, 50G, 100G, 200G and 400G ports.
The data is broken down into a number of lower-speed lanes. For 40G there are 4 lanes of 10 Gbps each. For 100G there are 20 lanes of 5 Gbps each. Within each lane the data is broken down into 66-bit code-words.
During transport the lanes may be swapped and skewed with respect to each other. To deal with this each lane contains marker words with a virtual lane index. The parameters are index with a physical lane index which corresponds to a fixed numbering of the underlying fibers or wavelengths.
The lanes can also be put into PRBS mode where they transmit a bit pattern used for diagnosing fiber-level problems, and the receiving side can lock to these patterns.
Errors can be injected both at the CAUI level and at the bit level.
The high speed port parameter names all have the form PP_xxx and require a module index and a port index, and most also require a physical lane index.