SMF is experimental. When we talk about deployments of duplicate
detection, we're focused on standards-based systems.
Note that ipv4-id-update is standards-track.
> That said, SMF deployment with IPv4 DPD on IP-ID would be limited.
> What to do?
IMO, recommend H-DPD and change the discussion to explain why the ID
shouldn't be used for DPD (the text is basically already there - it
mentions the idea, but then explains that it's not likely to work anyway).
Use of the IP ID for this purpose is problematic for a variety of
reasons, which is why ipv4-id-update deprecates use of that field for