[AusNOG] curious about lessons learned from your fiber rollouts?

[John Mann]

Dave,

[ Possibly dated information from the 2000's rollout of VERNet and AARNet ]

For <100 km (say) links, thick fibre builds and CWDM optics (one service
per pair, or passive muxes)
beats DWDM on skinny fibre.
In a pinch, circulators can be used to get the same set of frequencies
going both ways on a single core.
Watch fibre cleanliness and splices, may need attenuators on short CWDM
hops.

Try and play in the wholesale fibre market, not the retail market.
Build a thick fibre run somewhere, and pair-swap with someone to get access
somewhere else.
Leasing conduit, fibres or wavelengths is OK for short-term sites,
otherwise higher long-term costs!

Try co-operative multi-fibre build to save costs / increase coverage
https://www.aarnet.edu.au/fibre-optic-sharing-in-regional-australia-to-create-opportunities
But be careful about who owns/controls the resulting infrastructure; get an
IRU :-(

For fibre resilience, build hierarchical dual-attached rings. (Neil Clarke
VERNnet design)
CoreA <-> Hub1 <-> Hub2 <-> CoreB ; Hub1 <-> Site1 <-> Site2 ... <-> Hub2
  add more hub rings from the core; and more site rings from each hub pair.
Also helps differentiate between a broken link vs. no power at a remote
site.

And finally, look out for environmental factors like mice eating fibre
termination epoxy.
https://users.monash.edu.au/~ralphk/murine-network-engineer-03062009.jpg
from Ralph Klimek https://users.monash.edu.au/~ralphk/more3.html

Thanks,
    John

On Thu, 30 Mar 2023 at 02:49, Dave Taht <dave.taht at gmail.com> wrote:

> I am doing an AMA friday, in part about the $70B dollar USA NTIA
> broadband and BEAD programs, which are largely targetted at improving
> rural access to the internet. The target audience is one with which I
> am mostly unfamiliar, the directors of the 50 US states administering
> these programs.
>
> I am very interested about what y'all have learned about how to roll
> out fiber and fixed wireless right, in your country, so far, and what
> could be done better, in mine.
>
> Please let me know what you think here, (links to studies would be
> great, too)
>
> and/or come heckle!
>
> --
> AMA March 31: https://www.broadband.io/c/broadband-grant-events/dave-taht
> Dave Täht CEO, TekLibre, LLC
> _______________________________________________
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> AusNOG at lists.ausnog.net
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>
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