Re: Another LTE network turns up as IPv4-only

[Matthew Kaufman <matthew () matthew at>]

On 10/11/2012 8:44 AM, Mikael Abrahamsson wrote:
> 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.

If your SSH sessions could survive a change in address assignment (which 
often happens in a handover), they could survive a change in address 
family assignment as well.

Unfortunately, TCP - upon which ssh is built - uses the routing 
identifiers as the host identifiers, and so this doesn't work.

> The important reason to upgrade is to get higher speeds, not to get 
> access to new L3 tech.
>
> > 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.

But the stream would almost certainly be coming to a newly assigned IP 
address (and once you're doing that, who cares if the family changes too?)

> Consistent behaviour (apart from speed) on all networks is really 
> important for me, and I'd imagine it is for most users as well.

The *only* inconsistency would be when you're accessing the IPv6-only 
part of the Internet, of which there's currently none that consumers 
care about.

Matthew Kaufman