CGNAT Solutions

Ca By cb.list6 at
Thu Apr 30 04:14:10 UTC 2020

On Wed, Apr 29, 2020 at 7:17 PM Brandon Martin <lists.nanog at>

> 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

Correct, and T-Mobile uses this 464xlat approach for their home broadband
product as well

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