Re: [v6ops] Implementation Status of PREF64

[Philip Homburg <[e-mail]>]

In your letter dated Tue, 12 Oct 2021 10:45:39 +0200 you wrote:
>Now, "something which will aggregate to a /64 in total, for an arbitrary
>number of devices" - like, a /96, given 4 billion addresses each to up to
>4 billion devices - would definitely be something nice to have.
>
>But I assume that this is not going to work, as I hear that this is 
>not (only) for "things happening inside the device" but also "tethering",
>which would require a /64 then.  Which, incidentially, is a use case
>not desired in Enterprise context.

I don't see why tethering would require a /64. If the downstream devices
supports DHCPv6 IA_NA then it would work just fine.

Actually, for tethering with DHCPv6 IA_NA, you don't need PD. You can just
relay the request from the downstream device. (Whether actually relay,
or generate a new request). Obviously PD would help if ND state in the
first hop router is an issue. 

It is only when the downstream device insists on SLAAC that you would need
a /64.