Re: [v6ops] I-D Action: draft-ietf-v6ops-ipv6rtr-reqs-02.txt

[Tore Anderson <[e-mail]>]

* Mark Andrews <[e-mail]>

> > On 5 Mar 2018, at 5:54 pm, Lorenzo Colitti <[e-mail]> wrote:
> > 
> > DNS servers don't differ between cell towers. The thing that
> > differs is the /64 assigned to the device.
> > 
> > The phone announces its address in that /64 as the DNS server. When
> > the phone's /64 prefix changes, the old address is no longer valid
> > and potentially belongs to another customer of the network. But
> > with stateless DHCPv6, there's no way for the phone to tell clients
> > not to use it any more.  
> 
> So you are tearing down the network too fast in the phone.  The point
> to “deprecating” the prefix is to keep stuff like this working for a
> while using the deprecated addresses.  If the stateless DHCPv6 is
> adverting resources with TTLs longer than the RA timers then you as a
> developer of the phone have build a broken product.

You're forgetting that the network could be torn down for all sorts of
reasons outside the phone's control, like driving through a tunnel.
When you emerge from the tunnel 10 seconds later, the phone might
receive a new /64.

Tore