Re: IPv4 flag day

[Vincent Bernat via NANOG <nanog () lists nanog org>]

On 2026-06-17 08:48, jordi.palet--- via NANOG wrote:

> T-Mobile for example, got CPEs with CLAT that provide broadband via 3G/4G/5G, but in general I don’t see other big 
> players pushing the vendors for that. We really must change that if we want to move on. Why we want competition if we 
> don’t ask them to support the standards? or we just believe the CPE is a disposable cost and because that, we spend 
> more CapEx and OpEx in other parts of the network because the lack of vision when asking for CPEs?

In France, new broadband deployments are done with custom CPEs 
supporting CLAT. Free is using MAP-E. Bouygues is using MAP-T. SFR 
should also start using MAP-T, but this is unclear (for me) if they are 
moving beyond the tests. And Orange started deploying DS-Lite.

On the mobile front, I don't know exactly, but I suppose many are doing 
464XLAT, which is what is supported on both iOS and Android. There is 
one exception that is still doing NAT44, but the function can be 
colocated with the UPF and does not need to be very distributed.
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