[ay]

If you have NAT64, DNS64 and use “IPv6-mostly” option 108 on DHCP, then CLAT will be activated on supporting devices automatically - and then you can turn the dhcpv4 off when you see no leases on it :-)

By now there is a fair amount of material, eg:

https://indico.cern.ch/event/1274792/contributions/5444353/a...

[eqvinox]

Nit: you still need DHCPv4 to send 108 ;)

But also CLAT should turn on if a PREF64 is known and no IPv4 is available, regardless of 108.

[ay]

True :) the nice thing with 108 is that it is supposed to be “seamless” - that is, you will see (by the absence of leases) that “it’s finally time” to remove it. And the legacy old devices will still continue to work till then.