Re: [Softwires] Thoughts on new I-D?: Gateway Initiated Dual-stack lite Deployment

[Christian Vogt <christian.vogt at ericsson.com>]

Sri -

To clarify:  In addition to saying that an operator COULD decouple the
NAT from the gateway, it would be good to identify the scenarios where
the NAT MUST be decoupled from the gateway.  It is these and only these
scenarios that motivate your proposal.

But then again, there is at least one motivating scenario:  higher
efficiency of IPv4 address sharing in networks with multiple gateways.

- Christian



On Nov 5, 2009, Sri Gundavelli wrote:

> Hi Christian,
>
> Thanks for the review. We can surely add some text on the placement  
> of the
> CGN. Based on the topology and network design considerations,  
> operators may
> choose to place the CGN in the PDN gateway, or at the edge of the IPv4
> network with the fixed and mobile networks within the CGN scope. As  
> you
> pointed out, the collocation of the both the functions on the PDN, do
> require management of the shared address space. However, the spec  
> does not
> mandate the placement of the CGN function, as that is a typical  
> deployment
> and network topology consideration and its up to the operator. We  
> can surely
> add some text on this aspect.
>
> Regards
> Sri