Dear Authors,

Can you check that these actions have been completed correctly? I also have a 
question about each of them.

ACTION 1:

The following entries have been added to the IPFIX Information Elements 
registry:

ElementID: 530
Name: pathDelayMeanDeltaMicroseconds
Abstract Data Type: unsigned32
Data Type Semantics: deltaCounter
Status: current 
Description: This Information Element identifies the mean path delay of all 
packets in the Flow, in microseconds, between an OAM header encapsulating node 
and the local node with the OAM domain (either an OAM header transit node or an 
OAM header decapsulating node), according to 
OWDelay_HybridType1_IP_RFC9951_Seconds_Mean in the IANA [Performance Metric] 
Registry.
Additional Information: OWDelay_HybridType1_IP_RFC9951_Seconds_Mean in the IANA 
[Performance Metric] registry.
Reference: [RFC-ietf-opsawg-ipfix-on-path-telemetry-23]
Revision: 0
Date: 2026-04-02

ElementID: 531
Name: pathDelayMinDeltaMicroseconds
Abstract Data Type: unsigned32
Data Type Semantics: deltaCounter
Status: current 
Description: This Information Element identifies the lowest path delay of all 
packets in the Flow, in microseconds, between an OAM header encapsulating node 
and the local node with the OAM domain (either an OAM header transit node or an 
OAM header decapsulating node), according to the 
OWDelay_HybridType1_IP_RFC9951_Seconds_Min in the IANA [Performance Metric] 
Registry.
Additional Information: OWDelay_HybridType1_IP_RFC9951_Seconds_Min in the IANA 
[Performance Metric] registry.
Reference: [RFC-ietf-opsawg-ipfix-on-path-telemetry-23]
Revision: 0
Date: 2026-04-02

ElementID: 532
Name: pathDelayMaxDeltaMicroseconds
Abstract Data Type: unsigned32
Data Type Semantics: deltaCounter
Status: current 
Description: This Information Element identifies the highest path delay of all 
packets in the Flow, in microseconds, between an OAM header encapsulating node 
and the local node with the OAM domain (either an OAM header transit node or an 
OAM header decapsulating node), according to 
OWDelay_HybridType1_IP_RFC9951_Seconds_Max in the IANA [Performance Metric] 
Registry.
Additional Information: OWDelay_HybridType1_IP_RFC9951_Seconds_Max in the IANA 
[Performance Metric] registry.
Reference: [RFC-ietf-opsawg-ipfix-on-path-telemetry-23]
Revision: 0
Date: 2026-04-02

ElementID: 533
Name: pathDelaySumDeltaMicroseconds
Abstract Data Type: unsigned64
Data Type Semantics: deltaCounter
Status: current 
Description: This Information Element identifies the sum of the path delay of 
all packets in the Flow, in microseconds, between an OAM header encapsulating 
node and the local node with the OAM domain (either an OAM header transit node 
or an OAM header decapsulating node), according to 
OWDelay_HybridType1_IP_RFC9951_Seconds_Sum in the IANA [Performance Metric] 
Registry.
Additional Information: OWDelay_HybridType1_IP_RFC9951_Seconds_Sum in the IANA 
[Performance Metric] registry.
Reference: [RFC-ietf-opsawg-ipfix-on-path-telemetry-23]
Revision: 0
Date: 2026-04-02

Note: we'll update the references to point to RFC 9511 once the final link is 
available.

QUESTION: 

Should we provide links to the individual performance metric registration 
templates as well as the registry?

Please see
https://www.iana.org/assignments/ipfix

ACTION 2:

The following entries have been added to the Performance Metrics registry:

Identifier: 27
Name: OWDelay_HybridType1_IP_RFC9951_Seconds_Mean
URI: 
https://www.iana.org/assignments/performance-metrics/OWDelay_HybridType1_IP_RFC9951_Seconds_Mean
Description: This metric assesses the mean of one-way delays of all 
successfully forwarded IP packets constituting a single Flow. The measurement 
of one-sway delay is based on a single Observation Point [RFC7011] somewhere in 
the network.
Reference: [RFC-ietf-opsawg-ipfix-on-path-telemetry-23]
Change Controller: IETF
Version: 1.0

Identifier: 28
Name: OWDelay_HybridType1_IP_RFC9951_Seconds_Min        
URI: 
https://www.iana.org/assignments/performance-metrics/OWDelay_HybridType1_IP_RFC9951_Seconds_Min
Description: This metric assesses the minimum of one-way delays of all 
successfully forwarded IP packets constituting a single Flow. The measurement 
of one-way delay is based on a single Observation Point [RFC7011] somewhere in 
the network.
Reference: [RFC-ietf-opsawg-ipfix-on-path-telemetry-23]
Change Controller: IETF
Version: 1.0

Identifier: 29
Name: OWDelay_HybridType1_IP_RFC9951_Seconds_Max
URI: 
https://www.iana.org/assignments/performance-metrics/OWDelay_HybridType1_IP_RFC9951_Seconds_Max
Description: This metric assesses the maximum of one-way delays of all 
successfully forwarded IP packets constituting a single Flow. The measurement 
of one-way delay is based on a single Observation Point [RFC7011] somewhere in 
the network.
Reference: [RFC-ietf-opsawg-ipfix-on-path-telemetry-23]
Change Controller: IETF
Version: 1.0

Identifier: 30
Name: OWDelay_HybridType1_IP_RFC9951_Seconds_Sum
URI: 
https://www.iana.org/assignments/performance-metrics/OWDelay_HybridType1_IP_RFC9951_Seconds_Sum
Description: This metric assesses the maximum of one-way delays of all 
successfully forwarded IP packets constituting a single Flow. The measurement 
of one-way delay is based on a single Observation Point [RFC7011] somewhere in 
the network.
Reference: [RFC-ietf-opsawg-ipfix-on-path-telemetry-23]
Change Controller: IETF
Version: 1.0

QUESTION: 

For each registration template, I've removed the IDs, Names, URIs, and 
Descriptions associated with the other three registrations. I haven't done this 
for the "Reference Definition" field, though, because I'm not sure whether the 
three lines that precede Section 4.4.2.1 would need to be left in place, 
edited, or removed. What do you want us to do with this text?

==

For all output types:

OWDelay_HybridType1_IP:  The one-way delay of one IP packet is a
   Singleton.

For each <statistic> Singleton, one of the following subsections
applies.

==

Please see
https://www.iana.org/assignments/performance-metrics

thanks,
Amanda

On Tue Mar 31 05:54:08 2026, [email protected] wrote:
> Hi IANA,
> 
> Re:
> > After discussion with the authors, we will hold off on performing the
> > IANA actions for this document until the RFC number is assigned.
> 
> 
> The number 9951 has been assigned to this document. It is currently in
> AUTH48 state.
> 
> The files are here:
>   https://www.rfc-editor.org/authors/rfc9951.txt
>   https://www.rfc-editor.org/authors/rfc9951.html
>   https://www.rfc-editor.org/authors/rfc9951.pdf
>   https://www.rfc-editor.org/authors/rfc9951-diff.html (all changes
> from the approved I-D)
>   https://www.rfc-editor.org/authors/rfc9951-rfcdiff.html (side by
> side diff)
> 
> Thank you.
> 
> Alice Russo
> RFC Production Center
> 
> > On Oct 15, 2025, at 5:09 PM, Sabrina Tanamal via RT <drafts-
> > [email protected]> wrote:
> >
> > RFC Editor,
> >
> > After discussion with the authors, we will hold off on performing the
> > IANA actions for this document until the RFC number is assigned. The
> > Performance Metric registrations in Sections 4 and 6.1 will need to
> > reference [RFC-to-be], so we plan to add these entries to the
> > registries once the RFC reference is available.
> >
> > Similarly, the IPFIX registrations in Section 6.2 include references
> > to the Performance Metric registrations, so we will also defer those
> > actions until the RFC number is available.
> >
> > For your reference, we have reserved the following values so that you
> > may proceed with publication of the document:
> >
> > Performance Metric Values:
> >
> > 27 OWDelay_HybridType1_IP_RFC[RFC-to-be]_Seconds_Mean
> > 28 OWDelay_HybridType1_IP_RFC[RFC-to-be]_Seconds_Min
> > 29 OWDelay_HybridType1_IP_RFC[RFC-to-be]_Seconds_Max
> > 30 OWDelay_HybridType1_IP_RFC[RFC-to-be]_Seconds_Sum
> >
> > IPFIX:
> >
> > 530 pathDelayMeanDeltaMicroseconds
> > 531 pathDelayMinDeltaMicroseconds
> > 532 pathDelayMaxDeltaMicroseconds
> > 533 pathDelaySumDeltaMicroseconds
> >
> > Please let us know if you have any questions or need any additional
> > information. Please reply to this message to acknowledge receipt.
> >
> > Best regards,
> >
> > Sabrina Tanamal
> > IANA Operations Manager
> >

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