Subject: Re: [v6ops] NAT64 in RA, draft-ietf-6man-ra-pref64

From: JORDI PALET MARTINEZ <[email-masked]>
Date: Wed, 03 Jul 2019 12:37:59 +0200

Hi all,

El 2/7/19 2:30, "ipv6 en nombre de Fred Baker" <[email-masked] en nombre de [email-masked]> escribió:

    On Jun 30, 2019, at 8:06 PM, Jen Linkova <[email-masked]> wrote:
    > First I think we need to clarify what  'IPv6-only' means.
    
    To my mind, that is mostly complex because people make it complex, or because we allow them to.

-> I tried to fix this some time ago, but my draft expired. I've updated it now and just posted it:

https://datatracker.ietf.org/doc/draft-palet-v6ops-ipv6-only/?include_text=1

-> by the way, I'm actually not sure if this is in scope of 6man or v6ops ... I tend to think v6ops, but just in case !
    
    Imagine I have two hosts, each of which can only communicate using IPv6. They only have IPv6 addresses, and they possibly only have IPv6 stacks, but they don't have anything else. If they can communicate in a domain, from their perspective it is a domain that will support end to end IPv6 communication. If they have to do something in addition, the domain doesn't work for IPv6-only hosts.
    
    Now, it could be that the communications are translated to IPv4, X.25, or SNA in between. Yup, could happen. But we can communicate end to end using only IPv6, right?
    
    And, oh yes, someone using IPv4 (or X.25, or SNA) could go through a translator and communicate with an IPv6-only host in such a domain. It's IPv6-only up to that translator.
    
    The question boils down to - imagine I had only IPv6 to work with. Could we communicate? An IPv6-only host, or IPv6-only network, could communicate with that restriction. Everything else is noise - and if I have to deal with noise, it's not IPv6-only.
    --------------------------------------------------------------------------------
    The fact that there is a highway to hell and a stairway to heaven is an interesting comment on projected traffic volume...
    
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