[rpd] Re: Factors affecting in-region utilization - way forward?

[Kofi ansa akufo]

On Jul 20, 2014 11:56 PM, "Mukom Akong T." <mukom.tamon at gmail.com> wrote:
>
>
> On Sun, Jul 20, 2014 at 9:00 PM, Stephen Wilcox <steve.wilcox at ixreach.com>
wrote:
>>>
>>>
>>> What is interesting is that NAT has the potential to slow
>>> down your performance, as you scale up bandwidth.
>>
>>
>> Is there data on this (I am not doubting you just that I haven't heard
this being stated before)
>
>
>
> Not sure about data but I have experienced this and have heard lots of
others share similar experience.  The Internet suddenly becomes slow and
unusable Checks on how much traffic is being pulled down indicated the
bandwidth pipe is still largely unfilled. Reboot router, Internet becomes
fast and then gradually slows down.

I do agree the abuse of NAT - in this case on a campus network can hog
network resources (huge translation tables lookup etc).

So are we saying the cause is Service Providers are not willing to issue
enough IPs to such institutions that is why such campus networks exist?

Or people handling such networks may not be aware of alternatives of
getting their own PI space from AFRINIC?

As to upstreams charging for announcement of prefixes I guess its their
business policy?
>
>
> We also faced this big time on a very large university network. We
inherited it with multiple layers of NAT, 4Mbps satellite bandwidth and
hundreds of sophisticated end-users. As user-base grew and their
'sophistication' (think Youtube video streaming not just checking email and
browsing web pages) grew, we ran smack into this problem.
>
> a) Every system has a constraint (Systems Thinking 101).
> b) When you fix the constraint, another one pops up ... probably in a
different part of the system.
>
> In Africa, I think bandwidth used to be THE constraint in many countries.
As that's been solved in some places, the constraint has now shifted to
number of ports available for doing NAPT.
>
>
>
>
> --
>
> Mukom Akong T.
>
> http://about.me/perfexcellence |  twitter: @perfexcellent
>
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