Hi everyone,
after a good week of diving into that topic, I wanted to make sure I’m on the right track.
So: is this correctly understood?
DS-Lite uses an IPv6 tunnel to connect CPE that requires IPv4 communication to the ISP.
There’s no address translation on the CPE ingress point.
Address translation will take place on the ISP egress point, directly from IPv4 private address space into IPv6.
(e.g. packets from device 172.20.1.24 and device 172.22.3.54 that arrive on the router and want to reach locally unknown addresses will be sent through the tunnel without altered sender address and be CG-NATed on the ISP end.)
The necessity of the IPv4s on the tunnel itself (192.0.0.0/29) arises from local routing, but there shall be no translation from the local private networks to 192.0.0.0 before transmission to the ISP.
Right? 