Planning for Protocol Adoption and Subsequent Transitions
RFC 8170

Received changes through RFC Editor sync (created alias RFC 8170, changed abstract to 'Over the many years since the introduction of the Internet Protocol, we have seen a number of transitions throughout the protocol stack, such as deploying a new protocol, or updating or replacing an existing protocol.  Many protocols and technologies were not designed to enable smooth transition to alternatives or to easily deploy extensions; thus, some transitions, such as the introduction of IPv6, have been difficult.  This document attempts to summarize some basic principles to enable future transitions, and it also summarizes what makes for a good transition plan.', changed standardization level to Informational, changed state to RFC, added RFC published event at 2017-05-17, changed IAB state to Published RFC)