Re: Service providers that NAT their whole network?

A number of IETF documents(*) state that there are some service providers that place a NAT box in front of their entire network, so all their customers get private addresses rather than public address. It is often stated that these are primarily cable-based providers.

I am trying to get a handle on how common this practice is. No one that I have asked seems to know any provider that does this, and a search of a few FAQs plus about an hour of Googling hasn't turned up anything definite (but maybe I am using the wrong keywords ...).

We nat a portion of our residentail users -- not all of our network. As I recall our current nat pools are comprised of a /21 --sjk