Re: Ipv6 help

27 Aug 2020


      On Thu, Aug 27, 2020 at 1:00 AM Brian Johnson <brian.johnson@netgeek.us>
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I hope I’m not adding to any confusion. I find this conversation to be
interesting and want it to be productive. I have not deployed 464XLAT and
am only aware of android phones having a proper client.
Platforms with CLAT include:

Android (since 4.3)

Apple iOS (2 versions, HEv2 and real xlat)

Cisco iOS (this is just their SIIT)

Windows 10 (scoped only work on LTE modems)

Linux and OpenWRT

FreeBSD


I have worked with so many CPE devices and know that most have solid
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deployments of the required CLAT client. I also predict this will not
change any time soon. I live in “actually works and is solid” world. Not in
“I wish this would work” world.
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On Aug 27, 2020, at 2:50 AM, Mark Andrews <marka@isc.org> wrote:
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On 27 Aug 2020, at 17:33, Brian Johnson <brian.johnson@netgeek.us>
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If an ISP provides dual-stack to the customer, then the customer only
uses IPv4 when required and then will only use NAT444 to compensate for a
lack of IPv4 address space when an IPv4 connection is required. What am I
missing?
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Lots of assumptions people are making about how equipment is configured
which is causing people to talk past each other.
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On Aug 27, 2020, at 1:20 AM, Mark Andrews <marka@isc.org> wrote:
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On 27 Aug 2020, at 15:58, Bjørn Mork <bjorn@mork.no> wrote:
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Brian Johnson <brian.johnson@netgeek.us> writes:
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> 1) It needs *much less* IPv4 addresses (in the NAT64) for the same
number of customers.
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I cannot see how this is even possible. If I use private space
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internally to the CGN, then the available external space is the same
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and the internal customers are the same and I can do the same over
sub
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ratio under both circumstance. Tell me how the math is different.
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Because NAT64 implies DNS64, which avoids NATing any dual stack
service.
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This makes a major difference today.
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Only if you don’t have a CLAT installed and for home users that is
suicide
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at there is too much IPv4 only equipment.
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What really pushes traffic to IPv6 is that hosts prefer IPv6 by
default.  This
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works as long as the clients see a dual stack network.
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And no NAT64 does not imply DNS64.  You can publish a ipv4only.arpa
zone with
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the mappings for the NAT64.  There are now also RA options for
publishing these
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mappings.  There are also DHCPv6 options.
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Mark
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Bjørn
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--
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Mark Andrews, ISC
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1 Seymour St., Dundas Valley, NSW 2117, Australia
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PHONE: +61 2 9871 4742              INTERNET: marka@isc.org
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--
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Mark Andrews, ISC
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1 Seymour St., Dundas Valley, NSW 2117, Australia
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PHONE: +61 2 9871 4742              INTERNET: marka@isc.org
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Re: Ipv6 help

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