RE: FW: 3gpp scenario 2

[Pekka Savola <pekkas@netcore.fi>]

On Thu, 19 Dec 2002, Karim El-Malki (EAB) wrote:
>  > Sure, but my thought is that dual-stack v4/v6 backbones 
>  > already exist, and
>  > are definitely on the rise.  It's not like 3GPP networks are 
>  > deploying
>  > today or tomorrow.
> 
> I think the issue was that 3GPP core networks have already been deployed
> and are running IPv4.

.. but v6 part of it isn't deployed today or tomorrow.  Prudent folks
would be preparing for enabling of IPv6 today -- so that when finally
viable 3GPP solutions are available, their network is already upgraded,
router software tested etc.

>  > Often setting up the infrastructure required to
>  > install something like BGP/IGP tunneling is greater than the pain of 
>  > configured tunneling or dual-stack backbone.
> 
> When an operator introduces v6 islands over an existing v4 backbone
> it doesn't have to modify the existing network. Both configured
> tunnelling and EGP/IGP would be the same from this point of view.

.. at the expense of possibly having to upgrade latest and greatest 
software in the islands to support these mechanisms.

> In certain cases upgrading the whole backbone at once is worse.

Who says the backbone must be upgraded at once?  Usually things like these
are done over a longer period, e.g. 6-12 months.

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords