RE: 3gpp-analysis-05: miscellaneous non-critical issues

[<juha.wiljakka@nokia.com>]

Hi, Karim and Pekka!

I think we are pretty close resolving also this issue...  Minor comments (JW) below:

-----Original Message-----
From: ext Pekka Savola [mailto:pekkas@netcore.fi]
Sent: 22 September, 2003 18:55

>  > ==> I fail to see why public (global) IP addresses are a 
>  > requirement here? 
>  > Can't one with a private address also access IPv4 services, 
>  > possibly with
>  > some difficulties, yes, but still in principle..
>  > 
>  >  JW: Maybe public/global addresses need not be mentioned here. I just
>  > wrote it because the ideal case would be to have 
>  > public/global addresses.
>  > I could add a sentence clarifying that if UEs need to be 
>  > contacted (e.g. 
>  > thinking peer-to-peer services), public/global addresses 
>  > would be needed /
>  > preferred.
> 
> The meaning I infer is that if the v4 address is not public and you need
> to talk v4 hosts outside your private domain then you go through one or
> more NATs. NAT is considered an "additional translator" above.

Right.. I didn't think of NAT as an additional translator.  In any case, a 
clarification will be needed.

 JW: That is a good point, because NAT *is* a translator (NAT-PT is not the 
only evil translator :), I will modify text according to this comment and also 
mention the peer-to-peer / node reachability case I already commented 
above.

>  > ==> I think this is in conflict with the text already 
>  > written earlier in
>  > this section.  I suggest:
>  > 
>  >     As a general guideline, native IPv6 communication
>  >     is preferred to IPv4 communication going through IPv4 NATs
>  >     to the same dual stack peer node.
>  > 
>  >  JW: I don't have any complaints.
> 
> This changes the meaning of the text so I don't agree.
> It is meant to say that using IPv6 is preferred (to IPv4
> through NATs), be it native connectivity or tunneled.

Yep, that's intentional.  However, the only change of substance here is 
that the "tunneled IPv6 from the UE" has been pretty much killed from the 
document already.

So, I think my text is better.  One could of course just say "As a general 
guideline, IPv6 communication ....", i.e., kill "native" by making it a 
bit more general while not pointing out the not-so-relevant details.

 JW: 
      => can we agree on Pekka's suggestion and just remove
      "native" from Pekka's text?

Cheers,
	-Juha-