multiple prefixes

Doug Barton dougb at
Tue Feb 12 19:22:45 CET 2013

On 02/12/2013 04:18 AM, Tore Anderson wrote:
> * Doug Barton
>> NPTv6 for free,
> Free, really?
> Which vendor gives away free NPTv6 translators?
> Who pays for the additional line cards and optics necessary to connect
> them to the rest of my network?
> Who pays for the man-hours required to rack them, configure them, set up
> monitoring of them, and document them?
> Who pays for the electricity the translators use?

... all costs in the margins since you're going to need networking gear 
to connect those internal hosts anyway.

> Who pays for the man-hours required to develop workarounds or
> alternative solutions for all the «applications that are adversely
> affected by NPTv6 Translation» (in the words of RFC 6296)?

... which also points out the existing, tried-and-true solutions that 
already exist for IPv4.

>> or hassle + $cost for IPv6 PI (if it's even available)
> The hassle of obtaining IPv6 PI in the RIPE region is to once fill out a
> ripe-467 request form, possibly in collaboration with your provider
> (a.k.a. sponsoring LIR), and waiting a day or two for the NCC to make
> the assignment.
> The NCC's cost is €50/year. Even if your sponsoring LIR decides to add a
> whopping 100% profit margin, my guess is that the NPTv6 translators are
> going to cost you more than that in electricity alone.
> PI suffers from none of the application issues NPTv6 have (this also
> applies for PA). You won't have to renumber if you change providers, and
> you have a clean upgrade path to multihoming and/or participation in the
> DFZ if you so choose.

David Barak already answered this more eloquently than I could.


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