Re: XGS-PON & "Dedicated" Service

[Karsten Thomann via NANOG <nanog () nanog org>]

Hi,

It depends on the configuration of the bandwidth how dedicated it is, leaving the shared PON architecture aside.

There are three different types of bandwidth on a PON
Committed: always reserved, can't be used by other customers, like fixed TDM bandwidth
Assured: your bandwidth is still guaranteed, but can be used by others if not needed by your connection
Best-effort: you get what is left by the other two.

You should ask how much of your bandwidth is committed and or assured as it can be a combination of all three in the 
worst case.
Like 50% of your circuit speed is committed, the next 25% assured and the last 25% best effort.

So the best would be to get an answer about what they are really delivering.

Karsten
⁣ ​

Am 25. Okt. 2023, 01:56, um 01:56, "Neader, Brent" <brent.neader () druryhotels com> schrieb:
> Hello!
>
> Interested in getting the larger community's thought on this.
>
> The primary question being does XGS-PON have a place in providing a
> dedicated enterprise level service (at least sold as one) in the
> marketplace?  Delivered via a residential (per the data sheet
> description) CPE, Nokia XS-010X-Q for a 1gb/1gb dedicated symmetrical
> service.
>
> Background, ive dealt with 30+ providers over the last 18 years,
> primarily last mile based.  Typically we seek out an
> Enterprise/Dedicated service, with an SLA, typically delivered via
> DWDM, CWDM, or AE, or equivalent.  We have also had a site or two
> delivered via a PON variant, typically with less of an SLA, typically
> maybe half to quarter of the price of a dedicated service.  Price & SLA
> sets the expectation of the service, CPE provided, underlying
> technology, etc.
>
> Dealing with a large over-builder right now who has an "elite"
> enterprise product (highest of 3 tiers) advertised as the following.
>
>
> -        100% dedicated bandwidth so you never have to compete for
> speed
>
>
> -        Mission Critical Reliability with 99.999% guaranteed uptime
>
>
> -        Financially backed SLA with the most stringent performance
> objectives
>
>
> -        Enterprise-level customer service and technical support
>
> Now I understand with XGS, you can have various QOS in place (WRR/SP,
> etc), but inherently there are still shared splits involved, that just
> aren't a thing in other truly dedicated technologies.  Expectations
> were set with the provider's sales team around what was to be delivered
> and how it was to be delivered that seemingly haven't been met by the
> product and service team.
>
> That aside, from an SP perspective, is it capable to wrap enough layers
> around service to be "dedicated" even when delivered via a conflicting
> underlying technology?  Or could that be considered disingenuous for
> those that want to know and understand the difference?  Im hoping the
> service itself and support team make up for the difference, but
> obviously a little concerned.
>
> Thanks!