Re: [v6ops] 464xlat case study (was reclassify 464XLAT as standard instead of info)

Alexandre Petrescu <alexandre.petrescu@gmail.com> Thu, 28 September 2017 09:47 UTC

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To: Fred Baker <fredbaker.ietf@gmail.com>
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From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
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Subject: Re: [v6ops] 464xlat case study (was reclassify 464XLAT as standard instead of info)
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Le 25/09/2017 à 21:06, Fred Baker a écrit :
> 
> 
>> On Sep 25, 2017, at 9:08 AM, Alexandre Petrescu 
>> <alexandre.petrescu@gmail.com> wrote:
>> 
>> Excuse me, what do you mean by IPv4 private address exhaustion?
> 
> Several companies, notably Microsoft and Comcast in the v6ops 
> context, and said that they were running out not only of public
> space but, within their networks, private space.

In one company I looked at they didnt run out of public IPv4 space, yet
they preferred to extend their internal network by adding private IPv4
space - reasons invoked relate some times the security of NAT, other
times to other reasons.

Running out of private space is probably not a reason that a reasonable
sysadmin could invoke.  One can not run out of private space.  But one
can mis-design a network - yes.

Alex

  In the CGN context, this
> (in part, there were other considerations) resulted in us requesting 
> an additional RFC 1918-like prefix for the space between a presumed 
> NAT'd private address space and a CGN.
>