I wrote:
Just a procedural question. Though rfc2026 says: A specification for which significant implementation and successful operational experience has been obtained may be elevated to the Internet Standard level. An Internet Standard (which may simply be referred to as a Standard) is characterized by a high degree of technical maturity and by a generally held belief that the specified protocol or service provides significant benefit to the Internet community. does rfc1981bis qualify?
But, no response yet.
It seems to me that rfc1981 operationally failed
For example, see my presentation at APNIC32 How Path MTU Discovery Doesn't work https://meetings.apnic.net/__data/assets/file/0018/38214/pathMTU.pdf as a proof accepted by operational community that rfc1981 style PMTUD has been, is and will continue to be failing. Masataka Ohta