CGNAT Solutions

Brandon Martin lists.nanog at
Thu Apr 30 02:16:04 UTC 2020

On 4/29/20 10:12 PM, William Herrin wrote:
>> What allows them to work with v6 in such an efficient manner?
> A piece of client software is installed on every phone that presents
> an IPv4 address to the phone and then translates packets to IPv6 for
> relay over the network. This works because T-Mobile has considerable
> control over the phone.

FWIW, this software component (the CLAT) can also be on the CPE edge 
router which many ISPs either control outright these days or at least 
can influence.
Brandon Martin

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