On Mon, Dec 7, 2009 at 8:19 AM, Behcet Sarikaya <[email protected]> wrote: > Hi Cameron, > > Pls see below. > > ----- Original Message ---- >> From: Cameron Byrne <[email protected]> >> To: Hui Deng <[email protected]> >> Cc: [email protected] >> Sent: Sat, December 5, 2009 3:37:21 PM >> Subject: Re: [Softwires] Host based translation: v4-v6 >> >> >> Bottom line, we touched about the core aspects and also one use-case that >> >> you say is the key motivation for your chosen approach, which the use-case >> >> itself is debatable and a clear solution exists as many folks pointed out, >> >> enable dual-stack on the server, or use IPv6. We also talked about the key >> >> resulting benefits in each of the solutions. As far I see it, when >> > As far as I can see, the technical argument about our motivation >> > hasn't been questioned any more. >> > And for solutions, you already agreed that you are no supporting that. >> > >> >> DS-lite/GI-DS-lite is applied to mobile architectures, we have all the >> >> required tools for migration. >> > I guess that this is only said by one people, every other people has >> > different opinion on this. >> >> Make that 2, i agree with Sri > > I think we have to be careful in reaching conclusions on this case. > > Alain wrote in his mail which I quote here: > > In our case, we have: > > * many millions of edge devices (similar to your UE) > * thousands of routers > * thousands of servers > > So your mileage with DS-Lite varies according to how much your network fits > into the above proportions. If you exactly have the above, DS-Lite fits you > best. >
Yep, that sound like mobile. > In mobile networks, this translates into operators asking all base stations > to be IPv6-enabled and support/use IPv6 in applications like backhauling. > Nope, that does not sound like 3GPP mobile. 3GPP architecture is completely based on tunneling. The only devices that need IPv6 addresses or IPv6 routing capability are the UEs and the GGSN, and we have support in those devices today. Backhaul and cell sites are in no way impacted by IPv6 deployments to the end user. GTP / IuPS / IuB can all be IPv4...they are just the outside of a tunnel that may contain IPv4 or IPv6 packets on the inside. In fact, i have IPv6 delivered to cell phones today across my production national network (beta testing IPv6 PDP and handsets), and the RAN teams are not impacted at all. > Otherwise base stations are Layer 2 devices so you don't get a lot of mileage > from DS-Lite. In fact it is very easy/straightforward to deploy DS-Lite in > mobile networks. > > There is nothing wrong with this conclusion, it is just a fact. > I am not sure what your conclusion is, given that your facts regarding base stations (do you mean BTS? NodeB?) and backhaul are not correct. I frankly don't think DS-lite works well for mobile, just like I don't think PNAT works well, both require modifications and complication to the UE. I prefer the GI-DS-lite or NAT64 deployments since they don't require modifications to the UE beyond the natural evolution to the final architecture, which is IPv6 UE. Regards, Cameron > Regards, > > Behcet > > > > _______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
