A few GPON questions...

Tue Dec 11 19:12:00 UTC 2018

I wish this was an option.... There isn't any budget for ripping out this
system and we are already contractually obliged to deploy GPON in another
building that will be coming online in 2-3 years. We've severed the
contract beyond that already.

That being said.... We have ~580 ONTs (remember, we are deploying fiber to
the user, not to the MDF. There is no network closet.) To deploy a Cisco
compact switch or something similar would cost ~1,000/ea plus $200 minimum
for third party optics, then to add a large enough fiber distribution
switch for that many ports would be astronomically expensive.     It was a
poor desicion that will have to be maintained for the next ~25 years until
the next remodel thanks to our previous non technical administration
listening to the sales people over the previous network administration
team.

On Tue, Dec 11, 2018 at 8:32 AM Ben Cannon <ben at 6by7.net> wrote:

> Rip it out and run 9/125 SMF fiber home runs. Use BiDi SFPs to re-use your
> existing (likely SMF thankfully) cable plant.  My opinion.
>
> -Ben. AS15206
>
> On Dec 6, 2018, at 7:18 PM, Nick Bogle <nick at bogle.se> wrote:
>
> Hello fellow NANOG members :)
>
> Let me start with a little bit of background, my day job is a Network
> Engineer for a local university where we have primarily a Cisco environment
> from phones to switching to routing, etc. Before my time, we hired a
> contractor to design a GPON LAN system for a new building as a cost saving
> measure (though I am not sure how successful that was).
>
> Either way, the contractor is about to hand the system off to us, and we
> have gone through the training and such, and I feel confident in my ability
> to manage the system, but we have a few questions that the manufacturer of
> our equipment and our contractor didn't really want to answer. We are
> currently using a Dasan Zhone MXK-F1419 with several different downstream
> ONT models (all Zhone).
>
> -We would like to consider use of 3rd party GPON B+ Optics on the
> linecards to add redundancy to the splitter (as the cost of 1st party are
> too high). Does anyone have experience with 3rd party
> vendors/compatibility/stability issues? We were told they theoretically
> should work and just throw a log event, but it hasn't been tested. If so,
> what vendors would you recommend? So far all we've really seen are Ubiquiti
> and Fiberstore optics.
>
> -As GPON is a standard itself, I'm aware interoperability between OLT and
> ONT vendors is heavily limited.. Does anyone have any experience using say,
> Zhone ONT's with a different model OLT, or Zhone ONT's with a different
> model OLT? I've heard word that Zhone ONT's may be able to work with Nokia
> OLT's but it's technically not supported.
>
> -We've already experienced some pretty big stability issues (have replaced
> 1 line card 5 times..), our contractor is saying it's just because we were
> a pretty early adopter of this line and that they've fixed it and fixed
> internal policies to add additional QA and testing before shipping to
> customers. Does anyone have any experience with working with Zhone and
> their overall stability of components?
>
> - Any other thoughts/gotchas/advice for deploying a GPON environment in a
> corporate LAN? (or about deploying a Zhone solution) It's pretty service
> provider oriented, and is incredible noticeable in the CLI.
>
> Feel free to contact me offlist if you have any pertinent info that you
> don't want on the list.
>
> Thanks,
>
> Nick Bogle
> nick at bogle.se
>
>
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