100G-LR1 (DR/FR)

Mon Apr 3 20:54:55 UTC 2023

I have been using the  QSFP-100G-CWDM4 2k optics for within rack/DC for a couple of years now. They are about the same price as SR optics but allow the use of simple duplex single mode patches without blasting 10K optics at each other over a 2M patch. Never had one fail or any compatibility issues. 

-----Original Message-----
From: NANOG <nanog-bounces+tony=wicks.co.nz at nanog.org> On Behalf Of Mark Tinka
Sent: Monday, April 3, 2023 11:04 PM
To: nanog at nanog.org
Subject: Re: 100G-LR1 (DR/FR)

On 4/3/23 02:14, David Siegel wrote:

> At this point, I'd be happy to see others happily deploy a 
> single-lambda optic of almost any variety!  Since deploying 400G in a 
> clients network (but 100G still being the preferred connection 
> choice), any inquiry with respect to LR1, FR1 or DR+ is met with "no 
> thanks, LR4 please."
>
> If asked, I'd recommend FR1.  They're available at a great 
> price-point, and 2km reach is adequate for most applications.

Agreed.

Pricing between LR4, FR and DR is not too far apart.

The only optic that is substantially cheaper than all of them is the SR4.

So in my mind, FR is the most ideal, although I'd still use SR4 for in-rack, multi-mode cabling.

Mark.