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Re: [Int-area] SMF and intarea-ipv4-id-update

by Joe Touch :: Rate this Message:

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Hi, Teco,

On 3/30/2011 4:29 AM, Teco Boot wrote:
> Sorry for x-posting. But there is a conflict in:
> http://tools.ietf.org/html/draft-ietf-manet-smf
> http://tools.ietf.org/html/draft-ietf-intarea-ipv4-id-update
>
> SMF has a duplicate packet detection function based on the IPv4
> ID field. So text in ietf-intarea-ipv4-id-update section 4
> is not correct, in that there would be no deployments for such.

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
that purpose.

Joe
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