nanog mailing list archives

Re: New minimum speed for US broadband connections


From: Baldur Norddahl <baldur.norddahl () gmail com>
Date: Fri, 4 Jun 2021 00:03:53 +0200

On Thu, Jun 3, 2021 at 11:46 PM Mike Hammett <nanog () ics-il net> wrote:

2.4 gigabit per channel, but only 1.2 gigabit from a given access point.

Most often, WISPs choose down\up ratios between 85/15 and 66/34 and then
sell plans appropriately. If we're now required to have a symmetric 100
megs, you'll be robbing even more of the downstream for the upstream. Why
would you do that? So that you're relatively capable of providing what
you're selling. The alternative is gross oversubscription.


66/34 is 2:1 or exactly the same as GPON (2.4 down, 1.2 up). We sell 1000
symmetrical on that GPON and the customers are happy. You would have much
less oversubscription with 100/100 on a 1.2 Gbps wireless with 66:34
down/up ratio, than we are doing with GPON and 1000/1000. We are also doing
128 customers on a single OLT port.

Remember that a single customer only adds a few Mbps peak to your bandwidth
usage.

Regards,

Baldur

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