800G Specification [pdf]

#1

Post by doener » Tue, Apr 07, 2020, 9:00 AM UTC

800G Specification [pdf]
ethernettechnologyconsortium.org

Re: 800G Specification [pdf]

#2

Post by segfaultbuserr » Wed, Apr 08, 2020, 11:49 PM UTC

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

Re: 800G Specification [pdf]

#3

Post by nullc » Thu, Apr 09, 2020, 12:00 AM UTC

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.

Re: 800G Specification [pdf]

#4

Post by francoisLabonte » Thu, Apr 09, 2020, 8:12 PM UTC

nullc wrote: post #3

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.

Re: 800G Specification [pdf]

#5

Post by nullc » Fri, Apr 10, 2020, 2:28 AM UTC

francoisLabonte wrote: post #4

nullc wrote: post #3

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 de…

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!