5G roadblock: labor

Fri Jan 3 22:17:13 UTC 2020

On Fri, Jan 3, 2020 at 2:11 PM Ca By <cb.list6 at gmail.com> wrote:
> You are not using ipv4 today.
>
> The scenario you describe, using facetime (iOS) on T-Mobile US, you are not using ipv4 on the device.  T-Mobile does not assign ipv4 addresses to iOS or Android devices in default scenarios, has not for years.
>
> If the far end of your facetime call is v4-only, you may need nat64 in the cloud.... but otherwise no v4 in the flow, and no v4 on the device.

AFAIK, that's not correct. T-Mobile does provide IPv4 *on the device*
but translates it to IPv6 (464xlat) before the packets leave the
device for the network.

Regards,
Bill Herrin

-- 
William Herrin
bill at herrin.us
https://bill.herrin.us/