Re: I-D Action: draft-mishra-6man-variable-slaac-01.txt

[JORDI PALET MARTINEZ <[e-mail]>]

We drafted this text knowing that according to standards, a smartphone can use several PDP context, and each one obtain a /64, but that the standards (already in 3G release 10, I think around 2011) also support DHCPv6-PD, so it is expected that if it is not a smartphone, but a router, it will support a shorter prefix (/48, /56, etc.).

I think Cameron confirmed that in a previous email in this thread.

The problem seems to be that either vendors didn't implemented it, or operators didn't deployed it.

Also, Alex insisted that chipset vendors don't support it. I don't think this is the case, I recall having used DHCPv6-PD with an LTE router long time ago.

I'm sure we have in the list folks from Apple, Broadcom, Qualcomm, maybe ARM, or somebody in the list can reach them, to ensure if this is a chipset problem, which I don't think is the case.

It looks to me it is more a problem of the rest of the mobile network equipment, just not implementing it by default.


El 8/11/20 22:44, "ipv6 en nombre de Brian E Carpenter" <[e-mail] en nombre de [e-mail]> escribió:

    On 09-Nov-20 09:14, JORDI PALET MARTINEZ wrote:
    > This is wrong. As one of the authors of that document, I can ensure that it covers both aspects, size and persistence and it also covers mobile. See:
    > 
    >  
    > 
    > 4.2.4. Considerations for Cellular Operators
    > 
    > There is a clear exception to the rule described above when assigning prefixes in a cellular network. In this case, a /64 will need to be provided for each PDP context for cellular phones, whereas for LTE modems/routers, i.e. in the case of broadband by means of cellular access, it will still be necessary to choose a /48 or /56 in accordance with the aforementioned considerations.
    > 

    Can you be more explicit? Are you saying that this problem is in fact solved for 5G modems? If so, and 4G is soon to be legacy, why are we even having this discussion?

    Regards
         Brian


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