ALTO Deployment Considerations

The information below is for an old version of the document
Document Type Expired Internet-Draft (alto WG)
Last updated 2012-09-03 (latest revision 2012-03-02)
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state WG Document
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Many Internet applications are used to access resources, such as pieces of information or server processes, which are available in several equivalent replicas on different hosts. This includes, but is not limited to, peer-to-peer file sharing applications. The goal of Application-Layer Traffic Optimization (ALTO) is to provide guidance to these applications, which have to select one or several hosts from a set of candidates, that are able to provide a desired resource. The protocol is under specification in the ALTO working group. This memo discusses deployment related issues of ALTO for peer-to-peer and CDNs, some preliminary security considerations, and also initial guidance for application designers using ALTO.


Martin Stiemerling (
Sebastian Kiesel (
Stefano Previdi (

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