On Jan 15, 2010, at 7:53 PM, Jim Burwell wrote: > Sorry for late response here... > > On 1/14/2010 15:20, Cameron Byrne wrote: >> On Thu, Jan 14, 2010 at 3:00 PM, Jim Burwell <j...@jsbc.cc> wrote: >> >>> On 1/14/2010 11:10, Cameron Byrne wrote: >>> >>>> Folks, >>>> >>>> My question to the community is: assuming a network based IPv6 to IP4 >>>> translator is in place (like NAT64 / DNS64), are IPv6-only Internet >>>> services viable as a product today? In particular, would it be >>>> appropriate for a 3G /smartphone or wireless broadband focused on at >>>> casual (web and email) Internet users? Keep in mind, these users have >>>> NAT44 today. >>>> >>>> >>> You may also want to read up on Dual Stack Lite (DS-Lite) >>> <http://tools.ietf.org/html/draft-ietf-softwire-dual-stack-lite-02>, >>> >> I have looked at DS-lite very carefully. First, DS-Lite fits better >> for cable operators since they have CPE and can have a DS-lite >> function in the CPE that they control, and that in turn allows them to >> provide IPv4, IPv6, and dual-stack to the end-host that they do not >> control. DS-Lite does not fit as well for a mobile phones since it >> would require a major change to the phone's OS. Second, DS-Lite >> requires tunneling as well as translation, so it is one more piece of >> overhead in addition to NAT64 solution. For me, i believe it is less >> complex to manage a single stack IPv6 host with NAT64 translation than >> a dual stack host, tunneling infrastructure, as well as NAT44 CGN, >> which is what DS-lite requires. They both achieve the same result, >> but I believe in the mobile space there is a quicker time to market as >> well as more progress toward the end-goal of IPv6-only using NAT64 >> than DS-lite. >> > I guess the choice here is between standing up and managing a NAT64 CGN > + special DNS64 DNS server infrastructure, or a DS-Lite CGN + DS-Lite > tunneling infrastructure (you'd be able to keep existing "vanilla" DNS > servers). > > As I understand DS-Lite, an IPv6-capable device is a DS-Lite capable device without any modification. The DS-Lite Gateway does all the heavy lifting to provide IPv4 services and do the NAT64 translation between the IPv6-only end-user device (phone) and the IPv4 internet.
Owen
