BGP-LS Extensions for In-situ Flow Information Telemetry (IFIT) Capability Advertisement
draft-wang-idr-bgpls-extensions-ifit-00
Inter-Domain Routing Working Group Y. Wang
Internet-Draft T. Zhou
Intended status: Standards Track M. Liu
Expires: January 14, 2021 Huawei
R. Pang
China Unicom
H. Chen
China Telecom
July 13, 2020
BGP-LS Extensions for In-situ Flow Information Telemetry (IFIT)
Capability Advertisement
draft-wang-idr-bgpls-extensions-ifit-00
Abstract
This document extends Node and Link Attribute TLVs to Border Gateway
Protocol-Link State (BGP-LS) 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 entities (e.g.
Path Computation Element (PCE)) to gather each router's IFIT
capability for achieving the computation of end-to-end Traffic
Engineering (TE) paths that be able to fulfill the visibility of on-
path OAM data.
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
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and may be updated, replaced, or obsoleted by other documents at any
Wang, et al. Expires January 14, 2021 [Page 1]
Internet-Draft draft-wang-idr-bgpls-extensions-ifit-00 July 2020
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 January 14, 2021.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. IFIT Capability . . . . . . . . . . . . . . . . . . . . . . . 4
4. Signaling IFIT Capability Using BGP-LS . . . . . . . . . . . 5
4.1. Node IFIT TLV . . . . . . . . . . . . . . . . . . . . . . 5
4.2. Link IFIT TLV . . . . . . . . . . . . . . . . . . . . . . 6
5. Application . . . . . . . . . . . . . . . . . . . . . . . . . 7
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7
7. Security Considerations . . . . . . . . . . . . . . . . . . . 7
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 7
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 8
9.1. Normative References . . . . . . . . . . . . . . . . . . 8
9.2. Informative References . . . . . . . . . . . . . . . . . 8
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 8
1. Introduction
IFIT provides a high-level framework and a reflection-loop solution
for on-path telemetry [I-D.song-opsawg-ifit-framework]. At present,
there is a family of emerging on-path telemetry techniques, including
In-situ OAM (IOAM) [I-D.ietf-ippm-ioam-data], IOAM Direct Export
(DEX) [I-D.ietf-ippm-ioam-direct-export], Enhanced Alternate Marking
(EAM) [I-D.ietf-6man-ipv6-alt-mark], etc.
IFIT is a solution focusing on network domains. The "network domain"
consists of a set of network devices or entities within a single
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