Re: [v6ops] I-D Action: draft-ietf-v6ops-mobile-device-profile-08.txt

[Ross Chandler <[e-mail]>]

On 13 Aug 2014, at 13:59, <[e-mail]> <[e-mail]> wrote:

> Re-,
>  
> I updated my local copy with this NEW text:
>  
>    C_REC#12:  The cellular host must be able to be configured to limit
>               PDP type(s) for a given APN.  The default mode is to allow
>               all supported PDP types.  Note, C_REC#3 discusses the
>               default behavior for requesting PDP-Context type(s).
>  
>                  This feature is useful to drive the behavior of the UE
>                  to be aligned with: (1) service-specific constraints
>                  such as the use of IPv6-only for VoLTE (Voice over
>                  LTE), (2) network conditions with regards to the
>                  support of specific PDP types (e.g., IPv4v6 PDP-Context
>                  is not supported), (3) IPv4 sunset objectives, (4)
>                  subscription data, etc.
>  
> Please let me know if this is OK or more text is needed.

Hi Med,

That looks good. 

I understand the existing C_REC#12 remains in the document and the two are listed together.

BR 
Ross






> De : Ross Chandler [mailto:[e-mail]] 
> Envoyé : mercredi 13 août 2014 13:28
> À : BOUCADAIR Mohamed IMT/OLN
> Cc : IPv6 Ops WG
> Objet : Re: [v6ops] I-D Action: draft-ietf-v6ops-mobile-device-profile-08.txt
>  
>  
> Hi Med,
>  
> I agree it would be more appropriate to have it as a generalised recommendation, with the text explaining the situation where it might be considered useful to have it.
>  
> The reason I worded it like that was modelled on C_REC#12 which has an opening sentence explaining why it is needed, rather than just stating the requirement and having the explanation in the text. I suggested that it be placed after C_REC#12 in recognition that it is a similar type of recommendation.
>  
> Generalised this C_REC might also be useful when it comes to sunseting requests for IPv4 from UEs in 3GPP networks.
>  
> BR
> Ross
>  
>  
>  
> On 13 Aug 2014, at 11:53, <[e-mail]> <[e-mail]> wrote:
> 
> 
> Hi Ross,
>  
> Thank you for the support.
>  
> As for your proposed REC, wouldn’t be appropriate to generalize the recommendation? e.g.:
>  
>    C_REC#x:   The cellular host must be able to be configured to limit
>               PDP type(s) for a given APN.  The default mode is to allow
>               all supported PDP types.  Note, C_REC#3 discusses the
>               default behavior for requesting PDP-Context type(s).
>  
> If needed, the text can call out why this is needed (v4v6 not supported, subscriber profile, service-specific constraints (e.g., VoLTE), etc.
>  
> BTW, C_REC#12 already hints that PDP types can be limited. I’m particularly referring to this sentence:
>  
> “Note, distinct PDP type(s) can
>               be configured for home and roaming cases.”
>  
> Cheers,
> Med
>  
> De : v6ops [mailto:[e-mail]] De la part de Ross Chandler
> Envoyé : mardi 12 août 2014 16:41
> À : IPv6 Ops WG
> Objet : Re: [v6ops] I-D Action: draft-ietf-v6ops-mobile-device-profile-08.txt
>  
>  
> On 11 Aug 2014, at 14:21, [e-mail] wrote:
>  
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> This draft is a work item of the IPv6 Operations Working Group of the IETF.
> 
>        Title           : An Internet Protocol Version 6 (IPv6) Profile for 3GPP Mobile Devices
>        Authors         : David Binet
>                          Mohamed Boucadair
>                          Ales Vizdal
>                          Cameron Byrne
>                          Gang Chen
>           Filename        : draft-ietf-v6ops-mobile-device-profile-08.txt
>           Pages           : 18
>           Date            : 2014-08-11
>  
>  
> Hi All,
>  
> I support this useful draft.
>  
> An item I’d like to see added to the “Connectivity Recommendations” list after C_REC#12 is.
>  
>    C_REC#??:  Because of the potential for separate parallel IPv4 and 
>               IPv6 PDP/PDN connections when the network or subscriber 
>               profile does not support IPv4v6 PDP-Contexts, the cellular
>                     host must be able to be configured to exclude this type
>               from the available options.
>  
> For example if the list was just IPv4 or IPv6 (with 464XLAT implied) then the cellular host 
> would only ever attempt to set-up a single stack connection. 
>  
> I note that with:
>               Android the options are IPv4, IPv6 and IPv4/IPv6.
>               Windows Phone 8.1 the options are IPv4, IPv6, IPv4v6 and IPv4v6XLAT
>  
>  
> Best regards,
> Ross