ALTO Extension: Path Vector
draft-ietf-alto-path-vector-11
ALTO K. Gao
Internet-Draft Sichuan University
Intended status: Standards Track Y. Lee
Expires: 15 January 2021
S. Randriamasy
Nokia Bell Labs
Y.R. Yang
Yale University
J. Zhang
Tongji University
14 July 2020
ALTO Extension: Path Vector
draft-ietf-alto-path-vector-11
Abstract
This document is an extension to the base Application-Layer Traffic
Optimization protocol [RFC7285]. The current ALTO Cost Services only
allow applications to obtain cost values on an end-to-end path
defined by its source and destination. The present extension
provides abstracted information on particular network components or
elements traversed by a path between its source and destination.
Examples of such abstracted components are networks, data centers or
links. This is useful for applications whose performance is impacted
by particular network components they traverse or by their
properties. Applications having the choice among several connection
paths may use this information to select paths accordingly and
improve their performance. In particular, they may infer that
several paths share common links and prevent traffic bottlenecks by
avoiding such paths. This document introduces a new cost type called
Path Vector. A Path Vector is an array of entities that each
identifies an abstracted representation of a network part and that
are called Abstract Network Element (ANE). Each ANE is defined by a
set of properties. ANE properties are conveyed by an ALTO
information resource called "Property Map", that can be packed
together with the Path Vectors in a multipart response. They can
also be obtained via a separate ALTO request to a Property Map. An
ALTO Property Map is an extension to the ALTO protocol, that is
specified in another document entitled "Unified Properties for the
ALTO Protocol" [I-D.ietf-alto-unified-props-new].
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Gao, et al. Expires 15 January 2021 [Page 1]
Internet-Draft ALTO-PV July 2020
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This Internet-Draft will expire on 15 January 2021.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 4
2. Requirements Languages . . . . . . . . . . . . . . . . . . . 6
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 6
4. Problem Statement . . . . . . . . . . . . . . . . . . . . . . 7
4.1. Design Requirements . . . . . . . . . . . . . . . . . . . 7
4.2. Recent Use Cases . . . . . . . . . . . . . . . . . . . . 9
4.2.1. Large-scale Data Analytics . . . . . . . . . . . . . 9
4.2.2. Context-aware Data Transfer . . . . . . . . . . . . . 10
4.2.3. CDN and Service Edge . . . . . . . . . . . . . . . . 10
5. Path Vector Extension: Overview . . . . . . . . . . . . . . . 10
5.1. Abstract Network Element . . . . . . . . . . . . . . . . 11
5.1.1. ANE Domain . . . . . . . . . . . . . . . . . . . . . 11
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