On 27/02/2014, at 12:13 pm, Neil Fenemor <neil@underground.geek.nz> wrote:

As an ISP'll end up with collisions with their customers if RFC1918 space is used for their intermediary/ISP portion of NAT444, a new /10 (specifically 100.64.0.0/10) was allocated for this use. RFC6598 details the allocation, and the use cases for it.

Is there anyone here who has had to choose between CGN and dual-stack lite and is willing to say why they made the choice they did. I�m familiar with the various possible issues and I�m interested in hearing about what people�s actual issues have been.