* Mikael Abrahamsson
On Thu, 11 Oct 2012, Tore Anderson wrote:
That some features are available only on the most advanced access technology is perfectly reasonable and to be expected, IMHO. If not, what's the point of upgrading at all?
Uh, whut? I expect my ssh sessions to survive a 4G->3G handover, and if they happen to go over IPv6, I want them to survive.
In my experience, long-lived sessions are unreliable when you're on the move anyway. Go into an elevator? Sessions drop. Subway heads into a tunnel? Sessions drop. Get in range of a known WiFi network? Sessions drop. If you want to make an app for mobile, you better be able to recover. So for me, this is hardly a concern. Still, I'll grant you that you that you and I might have different priorities here. I think this is a really poor excuse for not supporting IPv6 and IPv4v6 in any case. Unless I'm gravely misinformed on how 3GPP mobile networks work, there is absolutely no reason why you cannot on LTE simultaneously support IPv4, IPv6, and IPv4v6. That the LTE network additionally supports IPv6/IPv4v6 does not *in any way* prevent you from sticking to IPv4 in all cases and enjoying the exact same session mobility between 2G/3G/4G as you can if the LTE network only supports IPv4. The session mobility problem will not go away completely by upgrading the 2G/3G part of the network, too. As I understand it, there's no shortage of devices on the market that only supports IPv6 on LTE, but not on 3G. Apple's iPhones and iPads, for example. So while it won't be the network's fault, it doesn't really matter - from the end users's point of view, the exact same thing will happen. Besides, the LTE network is being touted as a potential replacement for wired broadband. In that use case, the end user isn't likely to be mobile at all - presumably he'll have some CPE sitting in his window sill within LTE coverage 100% of the time. So no session mobility issues, and all the potential to be provisioned with IPv6 access. But no.
The important reason to upgrade is to get higher speeds, not to get access to new L3 tech.
Missed opportunity if you ask me. We could have had both.
I lose my YouTube streams when I get handed over from 3G to 2G, too, for example. I can live with that. I much prefer it to YouTube not working 3G as well, even though that might very well be considered a more "consistent" user experience.
I don't agree with you at all. I don't believe I would lose the stream when doing that handoff in our network, it might buffer some more (because EDGE is slower than HSDPA), but you wouldn't lose the stream.
I'm not watching a YouTube stream to see a still frame with a "buffering..." animation on top, so if I roam into 2G while watching something, I'll be putting my phone away anyway. Whether or not I actually lose the TCP connection is besides the point, the application is useless anyway. -- Tore Anderson Redpill Linpro AS - http://www.redpill-linpro.com