Re: [v6ops] Implementation Status of PREF64

[Owen DeLong <[e-mail]>]

> On Sep 28, 2021, at 1:49 PM, Philip Homburg <[e-mail]> wrote:
> 
>>> The net effect is that new flows use the new prefix right away, but the old
>>> prefix can be used for 2 hours longer. So timers are limited to 2 hours.
>> 
>> Indeed, this can be done with SLAAC.
> 
> I responded to Owen, who was arguing that DHCP is better suited to deal
> with flash renumbering than SLAAC.

Not necessarily better, but equally well suited at least.

> The impression I got was that the main reason to refuse to implement
> DHCPv6 IA_NA on Android is to always have a sufficiently large number
> of addresses available. With SLAAC you just pick what you want from a
> /64. Which DHCPv6 you might be limited to one address.
> 
> The argument strikes me as odd, because a router or a switch can limit a 
> device to just a few (or one) IP address. And I have encoutered such
> devices often enough to know that it is not just a theoretical concept.

If that’s the reason, it’s very silly. With DHCP, the android should act
as a DHCP Relay for it’s hotspot clients. With SLAAC, the whole handset
as a bridge that decrements hop count thing strikes me as odd in the
extreme to begin with.

Owen