[Idr] Re: I-D Action: draft-wang-idr-dpf-00.txt

[Jeffrey Haas <[e-mail]>]

Robert,

> On Dec 5, 2025, at 11:21 AM, Robert Raszuk <[e-mail]> wrote:
> 
> Just want to respond to one point made: 
> 
> > With your current proposal you have created a physical partitioning not logical one.
> 
> I agree with that assessment. For the case of BGP fabrics, and likely similar overlapping cases for IGP signaled fabrics, this is likely the desired property. 
> 
> I think history taught us that hard partitioning the IP fabric is to say it softly suboptimal choice of any solution. 
> 
> And with IGPs you always run your base topology across all links and nodes. 

None of these things, DPF, or any of our "routes with color" fundamentally change the problem: This is just a form of multi-topology distribution.  IGPs will suffer from the same considerations.

The conversation then reverts to the forwarding paradigms your mechanism supports, and what the operator is willing to deploy.

I'll agree with you that "all or nothing" proposals usually end up being wasteful, even if effective.  This inevitably pushes us to where the conversation is currently at across multiple WGs: How do we do better about congestion under such circumstances?

May we live in interesting times.

I believe we've exhausted the original point about overlaps with IGP technology for the moment, and will be excluding LSR in future responses.

-- Jeff