When the IPv4 server and path is working but the IPv6 server or IPv6
path is down, a dual-stack client application experiences significant
connection delay compared to an IPv4-only client. This is
undesirable because it causes the dual-stack client to have a worse
user experience. This document specifies requirements for algorithms
that reduce this delay, and provides an example algorithm.
Working Group Summary
v6ops considered this carefully, and tested various possible implementations of the solution.
The document appears to be of high quality per the numerous reviews received.
Joel Jaegli is shepherd