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Re: [802.3_B400G] 22 Mar Contributions Update

Hi Ali

 

All very important points.


Given this insight, what is your prediction for the year in which the 1st million 800GbE and 1st million 1.6TbE optical ports will ship?


Chris

 

From: Ali Ghiasi <aghiasi@xxxxxxxxx>
Sent: Monday, March 22, 2021 3:06 PM
To: Chris Cole <chris.cole@xxxxxxxxx>
Cc: STDS-802-3-B400G@xxxxxxxxxxxxxxxxx
Subject: [EXTERNAL]: Re: [802.3_B400G] 22 Mar Contributions Update

 

Hello Chris,

 

With availability of QSFP-DD800/OSFP and 802.3ck 100G/lane coupled with Ethernet Technology Consortium (ETC) 800G MAC the cost of providing 800 GbE practically speaking is free, but we all know the primary applications are 100/200/400 GbE breakouts.

 

As long the plumbing exist for 1600 GbE and adding 1600 GbE MAC/PCS/FEC is about free then 51.2 Tb switches may include 1600 GbE MAC where the real usage will be 200/400/800 GbE.

According to Mr. Rob Stone (https://www.ieee802.org/3/B400G/public/21_03/stone_b400g_01_210301.pdf [ieee802.org]), Facebook will be operating the fabric links at 400 GbE with 51.2 Tb switch generation.

 

In my opinion we are facing some serious headwinds:

               - the pluming for 1600 GbE may end up to be much more complex and costly

               - some of the proposed FEC implementations see Mr. Xinyuan Wang (https://www.ieee802.org/3/B400G/public/21_02/wang_b400g_01_210208.pdf [ieee802.org] ) could make it too costly for an ASIC implementing x256 or x512 lanes to incorporate and 1600 GbE end-end FEC These in effect likely will push out 1600 GbE availability and may not be included on 51.2Tb switches due to cost premium until there exist real 1600 GbE applications.  

 

Thanks,

Ali Ghiasi

 

 

 



On Mar 22, 2021, at 11:07 AM, Chris Cole <chris.cole@xxxxxxxxx> wrote:

 

Dear >400GbE Study Group Participants,

 

We ran out of time during my presentation slot to give everyone an opportunity to ask questions and make comments.


Cedric Lam had an important projection to share, which is that 800G duplex fiber modules will ship in 2022.

 

In his presentation, Ali Ghiasi pointed out that 800GbE standards work started in the Ethernet Technology Consortium (ETC) before the start of the >400GbE SG. Brad Booth, ETC Chair, and Rob Stone, ETC Technical WG Chair, informed me that this started in 2019. 

 

So my predictions are crumbling before the ink is dry on the presentation, and the 800GbE table entries need the below update.  

 

1st

802.3 Project

designation

>400GbE

>400GbE

GbE Rate

800

800

work start

2021

2019

published

2025

<image001.png>

2025

1st shipment

year

2023/24

2022

type

LR8

“LR8”

wavelength

8x100

8x100

I/O

8x100

8x100

form factor

OSFP

QSFP-DD

OSFP

 

As Brad cautioned us on the call, and Cedric did similarly after the call, predictions based on the past should be taken with a grain of salt as new trends and dependencies are rapidly developing. I will redouble my efforts and more carefully study the crystal color energy wheel to find a more reliable color. 

 

Chris

 

From: John D'Ambrosia <jdambrosia@xxxxxxxxx> 
Sent: Saturday, March 20, 2021 5:17 PM
To: STDS-802-3-B400G@xxxxxxxxxxxxxxxxx
Subject: [802.3_B400G] 22 Mar Contributions Update

 

All,

All meeting material for the 22 March meeting of the Mar 2021 Study Group Session have been uploaded -

 

Regards

 

John D’Ambrosia

Chair, IEEE 802.3 Beyond 400 Gb/s Ethernet Study Group

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