Hey Rene,
In your last diagram in this lesson, suppose we have many private AS behind R2 which needs to go to the Internet, in this case how will R2 handle those sessions ? We all know that in similar situation in IPv4 world we have PAT which maps the private IP with one Public IP using unique port number how does R2 handle this situation? Appreciate if you shed some light on this.
Best,
Sahil