[c-nsp] Typical broadband aggregation rates

[Arie Vayner]

Justin,

>From my experience there is a limit to how much bandwidth (on average) a
reasonable subscriber would use, even if you increase their bandwidth.
For the reasonable user it does not really matter if you have 512K, 1.5M or
5M as the application would be the same - some browsing, some P2P, some
email etc.
This of course changes when you deal with heavy P2P users or business
services.

Actually what may create a big impact on the bandwidth usage are new
applications like IPTV/You Tube or some new thing we haven't heard of yet.
Unless you are going to offer these services on your own, you can only guess
what would be the effect of some future app on your network (and add some
slack to be able to absorb it...)

An exception to what I am writing could be the case when you upgrade a 384K
user to 1.5M - there may be some increase in bandwidth usage, as 384K is a
bit low, and they may start enjoying their new bandwidth by using new
applications (or just use them more as it becomes more comfortable).

Arie

On 5/11/07, Justin Shore <justin at justinshore.com> wrote:
>
> What do most ISPs consider to be an acceptable (or feasible yet
> desirable) aggregation rate, particularly with broadband offerings?  I'm
> calculating this right now for our ISP.  Our current ADSL offering is
> very low due to carrier backhaul limitations (384/128) but we plan on
> raising this to a more reasonable level in the next few months as we
> roll out ADSL2+.  Our cable offering is 1.5/256.  We're contemplating
> 2-5Mbps for base packages with both types of service.
>
> What I'm trying to do is calculate the cost of providing a single
> average user with bandwidth for capacity and sales planning.  By my
> calculation we are at roughly 32:1 when only putting the broadband users
> into the equation.  I'm sure we should somehow factor in the 5% of the
> userbase that chews up 95% of the bandwidth.  Our dialup userbase, while
> nearly 1000 strong, doesn't consume enough to be of much concern at all.
>   Our leased line customers I'll probably count as 1:1.  Do many of you
> aggregate leased line customers (assuming an SLA doesn't prohibit it)?
>
> Would anyone mind sharing what your agg rates and general speed
> offerings are or what you want to strive for?  Tips or guidance for how
> to make this calculation more accurate would be appreciated too.  I
> don't see a Cisco SRND for Service Providers?  Does anyone know of any
> other resources?
>
> Thanks
>   Justin
>
>
>
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