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An Extension for Application-Layer Traffic Optimization (ALTO): Path Vector

Approval announcement
Draft of message to be sent after approval:


From: The IESG <>
To: IETF-Announce <>
Cc: The IESG <>,,,,,,
Subject: Document Action: 'An ALTO Extension: Path Vector' to Experimental RFC (draft-ietf-alto-path-vector-25.txt)

The IESG has approved the following document:
- 'An ALTO Extension: Path Vector'
  (draft-ietf-alto-path-vector-25.txt) as Experimental RFC

This document is the product of the Application-Layer Traffic Optimization
Working Group.

The IESG contact persons are Zaheduzzaman Sarker and Martin Duke.

A URL of this Internet Draft is:

Ballot Text

Technical Summary

This proposal enriches the data provided by ALTO to improve the client's understanding of the network topology, which can help identify shared bottlenecks.

Working Group Summary

There were no significant controversies.

Document Quality

The document has received several detailed reviews, and there are  handful of early implementations of the protocol and an active effort to implement the final version. As with the rest of ALTO, there are no firm plans for wide deployment in the internet. 

Notably, none of the directorate reviews were complete at the conclusion of Last Call.


The document shepherd is Vijay K. Gurbani, and the responsible area director is
Martin Duke.

There are no new IANA registries.

RFC Editor Note