[802.3_NGECDC] Fwd: [802.3_NGECDC] Draft - Beyond 400 GbE CFI Consensus Deck

[Chris Cole <chris.cole@xxxxxxxxxxx>]

Hi Ali,

 

Yes, it is a fascinating report; dispels many deeply held beliefs. 😊

 

WDM is any optic that has two or more wavelengths per fiber, on any wavelength grid.

 

Gray is any optic that has only one wavelength per fiber.

 

Chris

 

From: Ali Ghiasi <ali@xxxxxxxxxxxxxxxxx>
Sent: Wednesday, September 23, 2020 2:37 PM
To: Chris Cole <chris.cole@xxxxxxxxxxx>
Cc: STDS-802-3-NGECDC@xxxxxxxxxxxxxxxxx
Subject: Fwd: [802.3_NGECDC] Draft - Beyond 400 GbE CFI Consensus Deck

 

Hello Chris,

 

Interesting report!

 

What is the definition of Gray and WDM?  I assume LC must be counting CWDM4, 4WDM10, FR4, and LANWDM as WDM.

 

Thanks,
Ali Ghiasi

Begin forwarded message:

 

From: Chris Cole <chris.cole@xxxxxxxxxxx>

Subject: Re: [802.3_NGECDC] Draft - Beyond 400 GbE CFI Consensus Deck

Date: September 23, 2020 at 1:34:18 PM PDT

To: STDS-802-3-NGECDC@xxxxxxxxxxxxxxxxx

Reply-To: Chris Cole <chris.cole@xxxxxxxxxxx>

 

Our friends at Light-Counting just published their latest optics vendor survey report. As always it’s a treasure trove of wonderful data, and it’s irresistible to play with.

 

A problem in the way we look at volumes is focus on counting boxes, rather than underlying technology, for example the graph on page 57 of the below referenced CFI deck. Another example is just counting modules, whose limitations were illustrated by the recent discussion of break-out on this reflector. 

 

Our Logic colleagues have figured how to get a true picture of switches. In describing an ASIC, not only is the total bandwidth of the BGA package listed, but also the number and speed of the of SerDes and MAC cores. Since we get some of our best technical ideas from the Logic guys (ex. KR4 and KP4 FECs), why not learn from their approach here.

 

The underlying technology in optics are the wavelengths, so why not count those as well. In the below table, their volume is aggregated across all Ethernet codes for the first half of this year. There are multiple interesting observations that arise from this perspective.

 

Those that have access to the LC report will find even more interesting observations in wavelength cost data averaged across all codes.

 

Chris

 

 

		Vendor Survey, Q1 + Q2 2020 Ethernet Data,  9/17/20
λ Type		10G λ	25G λ	50G λ	100G λ
Fiber	Color	Volume	Volume	Volume	Volume
SMF	Gray	5,139,912	1,693,126	28,325	596,158
	WDM	1,871,800	11,065,264	418,384	16,004
	All	7,011,712	12,758,390	446,709	612,162
MMF	Gray	8,927,088	8,713,686	787,200	-
	WDM	1,224,000	1,040,000	-	-
	All	10,151,088	9,753,686	787,200	-

 

 

From: John D'Ambrosia <jdambrosia@xxxxxxxxx> 
Sent: Sunday, September 20, 2020 5:58 PM
To: STDS-802-3-NGECDC@xxxxxxxxxxxxxxxxx
Subject:  [802.3_NGECDC] Draft - Beyond 400 GbE CFI Consensus Deck

 

All,

I have uploaded the latest version of the draft CFI Consensus Deck.  Please see  https://www.ieee802.org/3/ad_hoc/ngrates/public/calls/20_0928/dambrosia_nea_01_200928.pdf.

 

This is not the version intended for presentation at the 9/28 meeting.  I will update the latest version as further modifications are made.  Please note I have also updated the supporters list.  If you emailed me your support, please check the list and confirm I have added you correctly.

 

Regards,

 

John D’Ambrosia

Champion, Beyond 400 GbE CFI Consensus

Chair, IEEE 802.3 NEA Ad hoc

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