Re: [AVTCORE] WG last call on draft-ietf-avtcore-6222bis-01

[Magnus Westerlund <[e-mail]>]

On 2013-03-26 16:51, Ali C. Begen (abegen) wrote:

>>>>
>>>> The main point I try to get across is that which interface you use for
>>>> the initial connection varies between different communication
>>>> establishments. If your goal is to have a long term persistent
>>>> identifier then you need to store the first one used in the context of
>>>> an application and use that, rather than take the interface you used
>>>> for
>>>> the SIP dialog, or similar, used to establish this particular RTP
>>>> session(s).
>>>
>>> The text is not saying to use MAC for long-term persistent CNAME. It
>>> says
>>> to use it for *short-term* persistency. Sorry, I am not getting where
>>> there is unclarity.
>>
>> I think what Magnus is saying is that one person's long term is another
>> person's short term, and the text needs to explain this situation.  How
>> about this:
>>
>>    For the duration of an RTP session, different interfaces
>>    might be used.  For example, a single RTP session might be
>>    established on a WiFi interface and a mobility event moves
>>    that session to a 3G interface.  When such an interface change
>>    occurs, the same CNAME MUST be retained.
> 
> Regardless of what method you use to produce a CNAME or how many
> interfaces you have or whether you roam from one to another during an RTP
> session, you must keep the same CNAME anyway. I think we wanted to say
> this thru "In either case, the procedure is performed once per
> initialization of the software." But your clarification is helpful, I
> agree.
> 

Exactly, this what was I was after. The main point is the need to
continue using the same CNAME during the whole communication session
that include any set of RTP sessions.

I will leave it the authors hands to do what you think are the best word
smithing to improve this.

Cheers

Magnus Westerlund

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