Hi Hui,

On 12/6/09 2:18 AM, "Hui Deng" <[email protected]> wrote:

> It's quite clear same as you said here, there are binary codes and codec codes
> which need additioinal payment for updating, it's a existing scenario.
> 

I do not understand this response. I'm not a codec or a DSP expert, but I
don't see how when you change an application to use IPv6 socket from an IPv4
socket, the codec has to change. I assume the SDP protocol can handle both
the versions in media description. I'm sure, some RTP, SDP or media experts
in the list can comment on this.

> What I don't understand is that there is the problem quite clear need
> to be solved by someone,
> but other people don't want to solve those problem just because his
> solution doesn't support it, ,
> and then they strongly prevent other people from solveing the problem
> I don't think it is good way in IETF.
> 

No. You have to convince the WG, not me. You started the thread, I disagreed
with this use-case and I don't believe this is a valid requirement. But, to
take your stand for a second, even if this is real and some how we are not
appreciating that requirement, this should be one of those rare applications
that have to be retired. You don't change the whole host architecture for
these one of a kind rare applications and bring all the host change baggage.
In migration, there is a cost as well.

Regarding your comment that I agreed offline that it is difficult to change
legacy deployed applications. *Yes*. I'm talking about *deployed*
applications, not about future applications dealing with future scenarios.
Please give the context along with the comment. All you need is one line
requirement for your application developers to use both IPv4 and IPv6
sockets for the future applications that they write, that's all. Note, this
is not a legacy deployed application requirement, its about a future
application unable to use IPv6 transport, compiled for an IPv6-only
platform.

Lets allow others to comment. We made our points and we are not converging.


Regards
Sri  

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