Another LTE network turns up as IPv4-only

Mikael Abrahamsson swmike at swm.pp.se
Thu Oct 11 08:41:46 UTC 2012


On Thu, 11 Oct 2012, Matthew Kaufman wrote:

> 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.

Why would there be an address change in a handover? That is definitely not 
expected behaviour.

> But the stream would almost certainly be coming to a newly assigned IP 
> address?

Why do you believe that address changes in handover? It's an integral part 
of 3GPP standard that your existing bearer is used for handover, so your 
address shouldn't change. If it changes then it means the handover didn't 
work as designed, probably due to some radio related problem. If the 
address changed, then it means the bearer was torn down and a new bearer 
was initiated. This is definitely not expected behaviour. We have plenty 
of customers with bearers that are up for tens of days in a row.

> 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.

If a user is accessing a stream from an IPv6 enabled CDN that stream 
shouldn't be reset just because a handover happened.

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se



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