>Pardon my ignorance. Is there a concrete case of this in some access
>
>network standard?
>
>(I heard some rumors thereabout)
I have heard rumors as well that were in favor of using DHCPv6 for address
allocation also in some cellular accesses.
By my understanding this is not yet so concrete problem that some other SDO or
product would have actually hit this (but those are often driving with rather
short lights).
However, the standards allow /128 allocation but I see lack of description how
an advanced host should behave in such a situation. Also by my understanding
(DS)MIP6, without NEMO, is allocating by default /128 HoA?
The problem could hypothetically occur e.g. when a host is providing IPv6
connectivity for Bluetooth PAN network by using cellular access as WAN (and
gets /64 from there), but moves into WLAN coverage (and possibly out of
cellular coverage at the same time) and starts to use the WLAN access as WAN
but gets only /128 from WLAN...
In case MIP6 and of just single HoA being available, the host perhaps should
use the care-of address (if /64) for providing network connectivity for the
local network instead of home address.
Best regards,
Teemu
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