Re: [v6ops] Fwd: New Version Notification for draft-linkova-v6ops-ipmaclimi-00.txt

Jen Linkova <furry13@gmail.com> Wed, 09 November 2022 01:10 UTC

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From: Jen Linkova <furry13@gmail.com>
Date: Wed, 09 Nov 2022 12:10:27 +1100
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To: Ole Troan <otroan@employees.org>
Cc: Nick Hilliard <nick@foobar.org>, V6 Ops List <v6ops@ietf.org>
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Subject: Re: [v6ops] Fwd: New Version Notification for draft-linkova-v6ops-ipmaclimi-00.txt
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On Wed, Nov 9, 2022 at 6:10 AM Ole Troan <otroan@employees.org> wrote:
> > What I'm struggling to understand from this thread is: what's the
> > device supposed to do if it needs N addresses and the network only
> > agrees to provide N-1?
> > Shall the application fail? How is it better than the situation we have now?
> > Or do we want NAT66?
>
> I don’t think a host/application can assume that the network is willing to assign it an arbitrary number of addresses. Or any more than a single non-link-local address.
>
> With SLAAC we don’t have a mechanism for the host to request that it needs addresses, nor do we have a mechanism to signal from the network that it doesn’t get it.

OK, let's imagine we have a protocol X to do this.
Now my ChromeOS device requests X addresses for all namespaces.
The network is saying: "Sorry, can't do this, only X-1 addresses are available".
The only options I see are:
- a given application/namespace fails, causing a user-visible outage.
- NAT66.

-- 
SY, Jen Linkova aka Furry