I agree with Alex that there is no need to duplicate what is already in the 
registry.  Moreover, given that all of the HTTP IEs were simply requested, I 
was thinking this document might not be needed.  But, when I get to the 
security considerations it got me thinking that there are several privacy 
issues at play here with things like SNI (and the existing httpUserAgent).

Therefore, Alex's point about use cases is a good one, including documenting 
what will be doing the exporting.   I can't see how routers would be capturing 
most (if not all) of these IEs since the overhead would be massive.  So, where 
do you envision these IEs being captured?

Joe
________________________________
From: Alex Huang Feng <[email protected]>
Sent: Wednesday, March 18, 2026 3:17 AM
To: [email protected] 
<[email protected]>
Cc: opsawg <[email protected]>
Subject: [OPSAWG]draft-gao-opsawg-ipfix-term-and-app

Dear authors,

As I commented during the WG meeting, many of the proposed IEs exist already in 
the IANA registry. But checking now, the IEs in the document already use the 
ones from the registry. I think it is confusing to re-state them in the 
document.

Also, please consider add a few explicit examples of the generated IPFIX 
messages showing how these new IEs solve your use cases. Similar to what we did 
in 
https://datatracker.ietf.org/doc/html/draft-ietf-opsawg-ipfix-on-path-telemetry-23#name-ipfix-encoding-examples

Regards,
Alex
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