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

Mukom Akong T. mukom.tamon at
Sun Jul 20 20:19:04 UTC 2014

On Mon, Jul 21, 2014 at 12:04 AM, Seun Ojedeji <seun.ojedeji at>
> - NAT affecting performance on bandwidth increase: I have not noticed this
> quite much

This isn't a valid scenario. It's merely a factor that feeds into the
second scenario. It goes something like this

a) A few NATed uses exist at a given bandwidth. Performance isn't great so
the users tend to do 'light' and essential stuff

b) More bandwidth is provisioned

c) Users suddenly become more sophisticated and find ways to use the extra
bandwidth (that's when they discover streaming video and audio)

d) Due to (c),   performance degrades. This is essentially your second

> - NAT affecting performance on concurrent user increase: This is quite
> valid and one of the downsides of a NATed network
> Cheers!
> sent from Google nexus 4
> kindly excuse brevity and typos.
> On 20 Jul 2014 20:56, "Mukom Akong T." <mukom.tamon at> wrote:
>> On Sun, Jul 20, 2014 at 9:00 PM, Stephen Wilcox <steve.wilcox at
>> > 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.
>> 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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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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