Re: Last Mile Design

[Grant Taylor via NANOG <nanog () 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.

Intriguing.

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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