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Re: [RRG] Long term clean-slate only for the RRG?
On 2008-06-28 09:59, Yakov Rekhter wrote:
>> NAT has a major OpEx hit but again the
>> mapping database proposals especially LISP-ALT is not really
>> introducing anything monumentally new.
> Wrt "NAT has a major OpEx hit", the (very wide) deployment of NATs
> should give you a hint that its benefits (significantly) outweight
> its cost. And what matters is not whether one claims that it is "a
> major OpEx hit", but that the experience showed that its benefits
> justify its cost. And yes, I know that some folks have a knee jerk
> reaction when they hear the word "NAT".
I think one of the undiscussed properties of NAT is that its OpEx
hit is disguised. We don't know how many help desk calls are a result
of undiagnosed NAT side-effects and we don't know how much end-user
time is wasted due to NAT state loss resulting in dropped sessions.
We do know that one help desk call wipes out a year's profit on
that subscriber, so I suspect that the hidden OpEx hit is quite
Unfortunately this doesn't change Yakov's argument, unless these
hidden costs can be measured and made explicit in customers' and
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