[v6ops] I-D Action: draft-ietf-v6ops-ipv6-roaming-analysis-02.txt

[Ross Chandler <[e-mail]>]

Subject line change as this has turned more appropriate to the roaming-analysis draft.

On 5 Aug 2014, at 18:42, Tore Anderson <[e-mail]> wrote:

>> The APN roaming protocol setting for “telenor.mobil” listed at that
>> URL says it is IPv6.
>> 
>> Is that really their setting? AFAIK the Android UE or more
>> accurately the RIL it calls doesn’t fallback to IPv4 when IPv6 is
>> explicitly requested.
> 
> Yes, that's their setting. No need for fallback when IPv6 works, right?
> 
> To be honest I've never quite understood what all the fuss is about
> regarding IPv6 and 3GPP roaming. My personal experience, having been a
> customer of Tele 2 Norway (formerly Network Norway) using their IPv6
> pilot for about two years, then moving to Telenor about six months ago,
> is that IPv6 roaming Just Works.
> 
> I've not visited every country in the world, but I have been around a
> bit, and I've made a point out of trying to establish an IPv6 data
> bearer to every single PLMN I can register with. So far I've had 100%
> success, including on Cameron's network... Thus enabling IPv6 roaming
> doesn't seem like a scary proposition to me. I'm guessing perhaps
> Telenor came to the same conclusion.

According to the manual my SGSN-MMEs have an “AllowIPv6ForAllVisitors” parameter that has to be set true to allow IPv6 PDP/PDN connections be set-up be visitors.

Out of the box the SGSN-MME had userplane IPv6 enabled for home users. It needed the DAF flag to be set (to allow dual-stack in a single bearer).

Proposal for  addition to the draft - it should mention “IPv6 Roaming friendly operator” settings (user plane IPv6 allowed, DAF=1 if possible) on how to make your network friendly for visitors. 

Ross