A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Application-Layer Traffic Optimization WG of
the IETF.
Title : ALTO Extension: Path Vector
Authors : Kai Gao
Young Lee
Sabine Randriamasy
Yang Richard Yang
Jingxuan Jensen Zhang
Filename : draft-ietf-alto-path-vector-12.txt
Pages : 46
Date : 2020-11-02
Abstract:
This document is an extension to the base Application-Layer Traffic
Optimization protocol [RFC7285]. While the current ALTO Cost
Services only allow applications to obtain numerical/ordinal cost
values on an end-to-end path defined by its source and destination,
the present extension enables the provision of abstracted information
on particular Abstract Network Elements on the path. These Abstract
Network Elements, or simply Elements, are components of the network
which handle data packets, and their properties may have an impact on
the end-to-end performance of the applications' traffic. Examples of
such Elements include physical devices such as routers, cables and
interfaces, and aggregations of devices such as subnetworks and data
centers. Such information is useful for applications whose
performance is impacted by particular Abstract Network Elements 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 Abstract Network Element (ANE). Each ANE is
associated with 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].
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-alto-path-vector/
There is also an HTML version available at:
https://www.ietf.org/archive/id/draft-ietf-alto-path-vector-12.html
A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-alto-path-vector-12
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