Ron, One point of clarification, in your *against* list, you include: On 11/28/11 2:25 PM, "Ronald Bonica" <rbonica@xxxxxxxxxxx> wrote: >- Some applications will break. These applications share the >characteristic of assuming that an interface is globally reachable if it >is numbered by an non-RFC 1918 address. To date, the only application >that has been identified as breaking is 6to4, but others may be >identified in the future. Since this address space is between the CPE router and CGN device, and is therefore not globally routable, the same application(s) (e.g. 6to4) will break if public or 'squat' space are used instead of shared CGN space. Such applications rely on the home router detecting that there is private, non-globally routable space (i.e. RFC1918) on the WAN and disabling such an application. While that same detection code will always fail for public address space and squat space since the exact range is not defined, there is the possibility of fixing the detection code in home routers if we do define shared CGN space for that purpose. Chris _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf