Bob Hinden wrote: > My take is doing anything isn’t necessary. OK.
2) The second reason is that I think the reason for few IANA allocation requests in this registry is that it is likely that packets containing any new assignments will be blocked in firewalls and middle boxes. It’s hard to get a new protocol deployed. I am doubtful this will change anytime soon. I suspect we will never run out, unless the Internet changes significantly.
Your argument is not applicable to protocols used between routers, though there won't be so many such protocols standardized. Masataka Ohta