> On Feb 22, 2021, at 6:44 AM, na...@jima.us wrote:
>
> While I don't doubt the accuracy of Lee's presentation at the time, at least
> two base factors have changed since then:
>
> - Greater deployment of IPv6 content (necessitating less CGN capacity per
> user)
This is only true if the ISP in question is implementing IPv6 along side their
CGN deployment and only if they get a significant uptake of IPv6 capability by
their end users.
> - Increased price of Legacy IP space on the secondary market (changing the
> formula) -- strictly speaking, this presentation was still in "primary
> market" era for LACNIC/ARIN/AFRINIC
While that’s true, even at current prices, IPv4 addresses are cheaper to buy
and/or lease than CGN.
> IPv6 migration is not generally aided by CGNAT, but CGNAT deployment is
> generally aided by IPv6 deployment; to reiterate the earlier point, any ISPs
> deploying CGNAT without first deploying IPv6 are burning cash.
Yep.
I still think that implementing CGN is a good way to burn cash vs. the
alternatives, but YMMV.
Owen
>
> - Jima
>
> From: NANOG On Behalf Of Owen DeLong
> Sent: Sunday, February 21, 2021 16:59
> To: Steve Saner
> Cc: nanog@nanog.org
> Subject: Re: CGNAT
>
>
> On Feb 18, 2021, at 8:38 AM, Steve Saner wrote:
>
>> We are starting to look at CGNAT solutions. The primary motivation at the
>> moment is to extend current IPv4 resources, but IPv6 migration is also a
>> factor.
>
> IPv6 Migration is generally not aided by CGNAT.
>
> In general, the economics today still work out to make purchasing or leasing
> addresses more favorable than CGNAT.
>
> It’s a bit dated by now, but still very relevant, see Lee Howard’s excellent
> research presented at the 2012 Rocky
> mountain v6 task force meeting:
>
> https://www.rmv6tf.org/wp-content/uploads/2012/11/TCO-of-CGN1.pdf
>
> Owen
>
>
> We've been in touch with A10. Just wondering if there are some alternative
> vendors that anyone would recommend. We'd probably be looking at a solution
> to support 5k to 15k customers and bandwidth up to around 30-40 gig as a
> starting point. A solution that is as transparent to user experience as
> possible is a priority.
>
> Thanks
>
> --
> Steve Saner
> ideatek HUMAN AT OUR VERY FIBER
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