On Thu, Dec 1, 2011 at 10:40, Alexandru Petrescu <
alexandru.petre...@gmail.com> wrote:
> Le 01/12/2011 18:24, Tao Sun a écrit :
>
> Hi Jouni, Thanks for the clarification. That is ture GGSN/PGW is not
>> mandate to do relay. "May" instead of "shall" is used to describe
>> GGSN/PGW's action. The only mandate is to use RA to obtain /64
>> prefix.
>>
>
> And that mandate is not sufficient when the UE is actually a Router
> ("mobile hotspot", "tethering"). For these cases, DHCPv6-PD is
> suggested by 3GPP specs. Thus, the 3GPP specs assume that a UE-Router
> (new term for this conversation) runs both RA _and_ DHCP. But 3GPP
> specs overlook the fact that an UE-Router would't use RA to
> auto-configure an address (stateless autoconf is only for Hosts).
That's not true - RFC 6204 says that an IPv6 CE router can use autoconf to
create an address. I think it's reasonable to say that if you were to
implement tethering using DHCPv6 PD, you would follow RFC 6204.
> Hence 3GPP specs could consider that _only_ DHCP should should be used
> by DHCPv6. In this sense, the above only mandate ("use RA to obtain
> /64 prefix") could be dropped altogether.
>
See what I mean? We're already talking about not using RAs at all any more,
and we don't even have a DHCPv6 route option yet...
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