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

Mukom Akong T. mukom.tamon at
Sun Jul 20 18:52:54 UTC 2014

On Sun, Jul 20, 2014 at 9:00 PM, Stephen Wilcox <steve.wilcox at>

>> 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.

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. |  twitter: @perfexcellent
“When you work, you are the FLUTE through whose lungs the whispering of the
hours turns to MUSIC" - Kahlil Gibran
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