Last Mile Design
baldur.norddahl at gmail.com
Sat Feb 9 20:13:17 UTC 2019
GPON is 2.4 Gbps downstream and 1.2 Gbps upstream. Residential users are
download heavy and more than 1:2. However there is a big difference between
average, peak and micro burst. The conclusion is not simple.
We typically have 60+ users on each port. We sell 1000/1000 internet. And
yet we only get good ratings for the speed.
I find that many, that are sceptical about the shared bandwidth of GPON,
forget that a typical POP might only be fed by a 10 Gbps uplink. Usually
this has much lower bandwidth per user than the GPON link.
lør. 9. feb. 2019 20.52 skrev Grant Taylor via NANOG <nanog at nanog.org>:
> On 2/9/19 12:12 PM, Miles Fidelman wrote:
> > With early PON designs, upstream bandwidth was horrible. Not
> > particularly useful if you're doing things like remote backup, or video
> > chatting, or running a server (business grade service). GPON does better
> > on upstream bandwidth, but it's still asymmetric.
> I would have not considered my municipal GPON to be asymmetric. Well,
> not as such. Routinely, when I do speed tests I get better upstream
> speeds than I do downstream speeds. (More below.)
> > If you're marketing to business customers, or home office professionals,
> > of families with multiple users that consume upstream bandwidth, AE
> > gives you a lot of room for upside growth (assuming you provision the
> > right kinds of fiber).
> Are you referring to the dedicated bandwidth between the CPU and the AE
> equipment? Or the fact that bandwidth feeding the GPON and all
> subscribers is aggregate?
> I have attributed the asymmetry in my speed tests to be that most people
> on my GPON are predominantly downloading, thus consuming aggregate
> download bandwidth. Conversely, few are uploading more than requests,
> thus using relatively little of the aggregate upload bandwidth.
> Do I see asymmetry? Yes. Is it truly asymmetric? I don't think so. I
> think is just based on consumption of aggregate bandwidth.
> I have no idea if this is normal for GPON or not. Hence one of the
> reasons that I'm finding this thread enlightening.
> Grant. . . .
> unix || die
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