Application Layer Traffic Optimization (ALTO) Cross-Domain Server Discovery
draft-ietf-alto-xdom-disc-01

Document Type Expired Internet-Draft (alto WG)
Last updated 2018-01-04 (latest revision 2017-07-03)
Replaces draft-kiesel-alto-xdom-disc
Stream IETF
Intended RFC status (None)
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Expired & archived
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Stream WG state WG Document
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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This Internet-Draft is no longer active.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
https://www.ietf.org/archive/id/draft-ietf-alto-xdom-disc-01.txt

Abstract

The goal of Application-Layer Traffic Optimization (ALTO) is to provide guidance to applications that have to select one or several hosts from a set of candidates capable of providing a desired resource. ALTO is realized by a client-server protocol. Before an ALTO client can ask for guidance it needs to discover one or more ALTO servers that can provide suitable guidance. In some deployment scenarios, in particular if the information about the network topology is partitioned and distributed over several ALTO servers, it may be needed to discover an ALTO server outside of the own network domain, in order to get appropriate guidance. This document details applicable scenarios, itemizes requirements, and specifies a procedure for ALTO cross-domain server discovery. Technically, the algorithm specified in this document takes one IP address or prefix and a U-NAPTR Service Parameter (i.e., "ALTO: http" or "ALTO:https") as parameters. It performs DNS lookups (for NAPTR resource records in the in-addr.arpa. or ip6.arpa. tree) and returns one or more URI(s) of information resources related to that IP address or prefix.

Authors

Sebastian Kiesel (ietf-alto@skiesel.de)
Martin Stiemerling (mls.ietf@gmail.com)

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