On Thu, Feb 23, 2017 at 12:44 PM, Brian E Carpenter <brian.e.carpenter@xxxxxxxxx> wrote:
I'm sorry, I'm wondering which word in my recent message that said
"I'm not aware of any generally available running code that will
be changed in even one instruction by the final text - that is indeed
a requirement for advancement to Internet Standard."
is hard to understand.
Help he understand, then. There is widely-deployed code that assumes that the interface ID is 64 and does not work on anything other than 64 bit prefix lengths. Currently that code is correct on all unicast space. If you change RFC 4291, won't that code be incorrect?