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IGP Extensions for In-situ Flow Information Telemetry (IFIT) Capability Advertisement

Document Type Expired Internet-Draft (individual)
Authors Yali Wang , Tianran Zhou , Fengwei Qin , Huanan Chen , Ran Pang
Last updated 2021-01-29 (Latest revision 2020-07-28)
Replaces draft-wang-lsr-ifit-node-capability-advertisement
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Intended RFC status (None)
Expired & archived
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IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at:


This document extends Node and Link Attribute TLVs to Interior Gateway Protocols (IGP) to advertise supported In-situ Flow Information Telemetry (IFIT) capabilities at node and/or link granularity. An ingress router cannot insert IFIT-Data-Fields for packets going into a path unless an egress router has indicated via signaling that it has the capability to process IFIT-Data-Fields. In addition, such advertisements would be useful for ingress routers to gather each router's IFIT capability for achieving the computation of Traffic Engineering (TE) paths or loose TE paths that be able to fulfill the visibility of on-path OAM data.


Yali Wang
Tianran Zhou
Fengwei Qin
Huanan Chen
Ran Pang

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)