Re: Ipv6 help

[JORDI PALET MARTINEZ via NANOG <nanog () nanog org>]

It was a way to say.

Because you use IPv4 pools in the CGN. Then when detected by some services such as PSN, they are black-listed. You use 
other pools, they become black listed again, and so on.

This is not the case with NAT64/464XLAT.

So yeah, it works but the cost of purchasing CGN is actually becoming higher and you will need sooner or later, to buy 
more IPv4 addresses once all them are black-listed.

I've not heard about anyone that has been able to convince Sony to clean their addresses from the PSN CGN black-list.
 
 

El 26/8/20 9:07, "Mark Andrews" <marka () isc org> escribió:

    How doesn’t it work?  As long as IPv6 is *on* NAT444 + dual stack has the same properties (or better, less PMTUD 
issues) as turning on 464XLAT in the CPE.  Traffic shifts to IPv6 due to hosts preferring IPv6.   You can still disable 
sending RA’s in either scenario.

    Mark

    > On 26 Aug 2020, at 16:51, JORDI PALET MARTINEZ via NANOG <nanog () nanog org> wrote:
    > 
    > No, this doesn't work
    > 
    > The point your're missing (when I talked before about putting all the costs to make a good calculation of each 
case and then replacing CPEs become actually cheaper) is that you need more IPv4 addresses in CGN than in NAT64 and 
further to that, in CGN, your IPv4 pools sooner or later become blocked by PSN (unless you don't have gammers among 
your customers).
    > 
    > El 25/8/20 22:42, "NANOG en nombre de Brian Johnson" <nanog-bounces+jordi.palet=consulintel.es () nanog org en 
nombre de brian.johnson () netgeek us> escribió:
    > 
    >    I usually solve this problem by designing for NAT444 and dual-stack. This solves both problems and allows for 
users to migrate as they are able/need to. If you try and force the change, you will loose users.
    > 
    > 
    >> On Aug 25, 2020, at 3:15 PM, Brandon Martin <lists.nanog () monmotha net> wrote:
    >> 
    >> On 8/25/20 3:38 PM, JORDI PALET MARTINEZ via NANOG wrote:
    >>> This is very common in many countries and not related to IPv6, but because many operators have special configs 
or features in the CPEs they provide.
    >> 
    >> I really, really hate to force users to use my network edge router (I provide the ONT, though, and I provide an 
edge router that works and most users do take it), but it can be tough to ensure users have something that supports all 
the right modern features and can be configured via standard means.
    >> 
    >> It would be nice if the consumer router industry could get its collective act together and at least come up with 
some easy-ish to understand feature support table that customers can match up with their service provider's list of 
needs.  The status quo of a list of devices that work right (which is of course often staggeringly short if you're 
doing any of these modern transition mechanisms) that needs constant updating and may not be easily available is not 
ideal.
    >> 
    >> Heck just having a real, complete list of supported features on the model support page on their website would be 
an improvement...
    >> -- 
    >> Brandon Martin
    > 
    > 
    > 
    > 
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    -- 
    Mark Andrews, ISC
    1 Seymour St., Dundas Valley, NSW 2117, Australia
    PHONE: +61 2 9871 4742              INTERNET: marka () isc org




**********************************************
IPv4 is over
Are you ready for the new Internet ?
http://www.theipv6company.com
The IPv6 Company

This electronic message contains information which may be privileged or confidential. The information is intended to be 
for the exclusive use of the individual(s) named above and further non-explicilty authorized disclosure, copying, 
distribution or use of the contents of this information, even if partially, including attached files, is strictly 
prohibited and will be considered a criminal offense. If you are not the intended recipient be aware that any 
disclosure, copying, distribution or use of the contents of this information, even if partially, including attached 
files, is strictly prohibited, will be considered a criminal offense, so you must reply to the original sender to 
inform about this communication and delete it.