RE: 100G over 100 km of dark fiber

[Brian Turnbow via NANOG <nanog () nanog org>]

Hi jared 

as others have pointed out there are lots of options


inphi offers these
https://www.inphi.com/products/colorz/


or use a box like packetlight, here is a Arista solution brief 
https://www.arista.com/assets/data/pdf/Whitepapers/Arista_Packetlight_100G_Extension_Solution.pdf
and if you serch for openline systems there are a few that do smaller systems 2/4/8 ports that are available
FS even offers this
https://www.fs.com/de-en/specials/100g-fmx-transport-platform-103.html
more expensive than optics  but an alternative and you can stay in low 5 figures.

cisco has the ncs55a2 with these
https://www.cisco.com/c/en/us/products/collateral/routers/network-convergence-system-5500-series/datasheet-c78-743732.html
that costs like a gazzilion dollars but your company may have great discounts...


HTH

Brian


> -----Original Message-----
> From: NANOG <nanog-bounces+b.turnbow=twt.it () nanog org> On Behalf Of
> Jared Brown
> Sent: Friday, October 30, 2020 3:19 PM
> To: nanog () nanog org
> Subject: 100G over 100 km of dark fiber
>
> Hello NANOG!
>
> I need to push 100G over 100 km of dark fiber. Since there are no 100G
> pluggable optics with this reach (~25 dB), I have been offered coherent
> transport systems to solve my problem. This is all good and well, except total
> system costs start from high five figures.
>
> So, my question is, do I have any other options?
>
> I can't help noticing that you can break out a 100G QSFP into four 25G QSFPs.
> 25G DWDM systems are relatively inexpensive (low five figures), but can you
> make 25G DWDM go 100 km?
>
> I only need the one 100G, so I don't really need a highly scalable DWDM
> system. I can't put anything midspan, or if I could it would cost more than just
> going with a coherent system.
>
>
> Jared