In-situ Flow Information Telemetry (IFIT) Node Capability Advertisement
draft-wang-lsr-ifit-node-capability-advertisement-00
Link State Routing Working Group Y. Wang
Internet-Draft T. Zhou
Intended status: Standards Track M. Liu
Expires: September 24, 2020 Huawei
R. Pang
China Unicom
March 23, 2020
In-situ Flow Information Telemetry (IFIT) Node Capability Advertisement
draft-wang-lsr-ifit-node-capability-advertisement-00
Abstract
For advertising In-situ Flow Information Telemetry (IFIT) node
capabilities within the entire routing domain, this document extends
a new optional TLV to the OSPF RI Opaque LSA, a new optional sub-TLV
to the IS-IS Router CAPABILITY TLV, and a new Node Attribute TLV that
is encoded in the BGP-LS attribute with Node NLRIs to carry IFIT node
capabilities information. Such advertisement allows entities (e.g. a
centralized controller) to determine whether a particular IFIT
functionality can be supported in a given network.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 24, 2020.
Wang, et al. Expires September 24, 2020 [Page 1]
Internet-Dradraft-wang-lsr-ifit-node-capability-advertisemen March 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. IFIT Node Capability Advertisement . . . . . . . . . . . . . 3
3.1. IFIT Node Capability Information . . . . . . . . . . . . 3
3.2. OSPF Extension IFIT Node Capability TLV . . . . . . . . . 5
3.3. IS-IS Extension IFIT Node Capability Sub-TLV . . . . . . 6
3.4. BGP-LS Extension IFIT Node Capability TLV . . . . . . . . 6
4. Application . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
6. Security Considerations . . . . . . . . . . . . . . . . . . . 9
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 9
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.1. Normative References . . . . . . . . . . . . . . . . . . 9
8.2. Informative References . . . . . . . . . . . . . . . . . 9
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction
IFIT provides a complete framework architecture and a reflection-loop
working solution for on-path flow telemetry
[I-D.song-opsawg-ifit-framework]. At present, there are a family of
emerging on-path flow telemetry techniques, including In-situ OAM
(IOAM) [I-D.ietf-ippm-ioam-data], Postcard-Based Telemetry (PBT)
[I-D.song-ippm-postcard-based-telemetry], IOAM Direct Export (DEX)
[I-D.ioamteam-ippm-ioam-direct-export], Enhanced Alternate Marking
(EAM) [I-D.zhou-ippm-enhanced-alternate-marking], etc. IFIT is a
solution focusing on network domains. The "network domain" consists
of a set of network devices or entities within a single Atonomous
System (AS). The part of the network which employs IFIT is referred
to as the IFIT domain. One network domain may consist of multiple
IFIT domains. An IFIT domain may cross multiple network domains.
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