Hi Joe,

The current text in intarea-ipv4-id-update is "no current deployments 
are known". I read this as a statement in general. Then, it is not correct.
I am fine with discouragement of usage of systems that use IP_ID for DPD,
but such systems are around.

Teco


Op 30 mrt 2011, om 13:46 heeft Joe Touch het volgende geschreven:

> 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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