Re: NAT64 in RA, draft-ietf-6man-ra-pref64

[Jen Linkova <[e-mail]>]

Hi Michael,

On Tue, May 28, 2019 at 1:57 AM Michael Richardson
<[e-mail]> wrote:
> The document says:
>
>    In a network that provides both IPv4 and NAT64, it may be desirable
>    for certain IPv4 addresses not to be translated.  An example might be
>    private address ranges that are local to the network and should not
>    be reached through the NAT64.  This type of configuration cannot be
>    conveyed to hosts using this option, or through other NAT64 prefix
>    provisioning mechanisms such as [RFC7050] or [RFC7225].  This problem
>    does not apply in IPv6-only networks, because in such networks, the
>    host does not have an IPv4 address and cannot reach any IPv4
>    destinations without the NAT64.
>
> And I guess I disagree with this in a subtle way, which Section 7
> (multihoming) tries to deal with.   Maybe you could write:
>
>    In a provisioning domain that provides both IPv4 and NAT64, it may be desirable
>    for certain IPv4 addresses not to be translated.  An example might be
>    private address ranges that are local to the provisioning domain and should not
>    be reached through the NAT64.  This type of configuration cannot be
>    conveyed to hosts using this option, or through other NAT64 prefix
>    provisioning mechanisms such as [RFC7050] or [RFC7225].  This problem
>    does not apply to hosts that are provisioned in IPv6-only networks,
>    because in such networks, the host does not have an IPv4 address and
>    cannot reach any IPv4 destinations without the NAT64.
>    Section 7 deals with the multihoming sitution more.

Thanks for the suggestion! I guess you are right, the "dual-stack +
NAT64" scenario is scoped to a PVD.
I'll update the section.

> The slides had some optional stuff which I think is gone from the document.

Quote the opposite, it has not been added there yet - we wanted to
discuss the options during the IETF104 and I'm incorporating
the feedback to the -01 version right now.

-- 
SY, Jen Linkova aka Furry