[bmwg] Re: [hackathon] IETF 126 Hackathon Project: In-Network Telemetry Aggregation using iOAM Aggregation Trace and Template Options

[[e-mail]]

Hi Alex,

Thanks for sharing.

Added ippm/bmwg, fwiw.

Cheers,
Med

De : Alexander Clemm <ludwig=[e-mail]>
Envoyé : mercredi 10 juin 2026 01:23
À : [e-mail]
Cc : 'Ramon Bister' <[e-mail]>; 'Severin Dellsperger' <[e-mail]>
Objet : [hackathon] IETF 126 Hackathon Project: In-Network Telemetry Aggregation using iOAM Aggregation Trace and Template Options


Hello IETF 126 Hackathon Team,

we just wanted to let you know that we have just added a new hackathon project to the hackathon Wiki.  The description follows below.

Please check it out and consider participating!  We also welcome your feedback – please don’t hesitate to contact us.

Kind regards
--- Alex Clemm and Ramon Bister

In-Network Telemetry Aggregation Using IOAM Aggregation Trace and Template Options

iOAM (in-situ Operations, Administration, Maintenance) has gained popularity as a mechanism to collect telemetry data from a network.  However, what is of interest for many use cases is not so much raw telemetry data records from nodes themselves, but aggregates of telemetry data across the nodes of the path traversed by a packet.  For example, aggregating packet dwell times can be indicative of end-to-end latency, identifying the interface with the deepest (maximum) queue depth along a path can expose bottlenecks, aggregating environmental indicators can help assess CO2-intensity of paths to optimize pollution-aware routing.

This hackathon project aims to demonstrate and extend a solution that allows to aggregate inband network telemetry data using new proposed extensions to iOAM for some of the mentioned use cases.  The starting point is a PoC for those new iOAM extensions implemented using P4 on BMv2 switches on Ubuntu.

In summary, our goal is to
- raise awareness and interest in the proposed solution
- add support for new use cases, incorporating new aggregations and possibly new instrumentation for data that can be aggregated
- provide a demo for existing and extended use cases

Depending on interest, there are other possibilities that could also be pursued, such as implementing a companion app to actively probe aggregate telemetry and/or to support an intent assurance use case for intent-based networking.

The following are the primary drafts related to this Hackathon Project:

- Aggregation Trace Option for In-Situ Operations, Administration, and Maintenance (OAM) (https://datatracker.ietf.org/doc/draft-cxx-ippm-ioamaggr/) defines a new option type that allows to aggregate IOAM data along a network path using aggregation functions such as sum, average, minimum, or maximum.

- In Situ Operations, Administration, and Maintenance (IOAM) Template Option (https://datatracker.ietf.org/doc/draft-mbci-ippm-ioam-template-option/) allows to define a fixed-length IOAM Option-Type that can be updated by transit nodes along a path, the contents of which is defined by a template.  It is possible to define templates to provide functionality equivalent to the Aggregation Trace Option, which supported as well.

A link to the repository of the PoC used as a starting point will be provided prior to the hackathon.
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