On 2012-10-25, Simon Perreault <si...@nomis80.org> wrote: > Le 2012-10-25 00:20, Constantine A. Murenin a écrit : >> No dual-stacking is >> provided; in their slides from [0], T-Mobile USA claims that IPv6-only >> with NAT64/DNS64 is cheaper than dual-stack with NAT44. > > Yes. I forgot to mention another reason why the 3GPP folks like NAT64: > most 3GPP equipment vendors charge ISPs by the number of "PDP contexts".
AIUI the second context also affects battery use on mobile devices. > Currently deployed equipment can not do dual-stack PDP contexts. The dual-stack contexts were added in 3gpp rel-8 and improved in rel-9 (from 2008/2009), so I guess it might take another few years before equipment supporting this gets widely deployed and they get the time between crashes down to an acceptable amount ;)
