800G Specification [pdf]

ethernettechnologyconsortium.org

24 pointsdoener4 comments

I feel like at some point they should make the bit-striping/deskew load spreading standardized and then stop proliferating more speed levels that are "the last speed, but striped across twice the number of lanes".

Particularly since the striping is happening above the FEC level.

Flex Ethernet is that attempt to standardize the lane stripping at whatever speed. Unfortunately that effort has grown to incorporate a kitchen sink worth of other features like groups and shaping... Which raises the hardware implementation cost and lowers the adoption rate.

https://www.oiforum.com/wp-content/uploads/2019/01/OIF-FLEXE...

At the 100G/200G/400G/800G specs are highly repetitive and the only points of debate are the type of FEC required given the high speed signals, signal loss for cost effective board/cable/optics and how parallel the FEC will be (tradeoff of hardware implementation cost and added latency). FEC has been 2 engines in parallel since 400G.

It's interesting that there isn't a no FEC or a reduced FEC (for reduced latency) anymore in this latest standard.

Thanks for the citation!

Better title: 800 Gb/s Ethernet Specification (from page 6)

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