Re: [Int-area] [ih] Fwd: Existing use of IP protocol 114 (any 0-hop protocol)

There's also the matter of whether allocating 114 for this doc would
establish a precedent.

On Fri, 20 Sep 2019 at 20:24, Brian E Carpenter <brian.e.carpenter@gmail.com>
wrote:

> On 21-Sep-19 14:11, Joe Touch wrote:
> > FWIW, there are many registries with such “dead” entries.
>
> 114 is a bit special. By definition, all our normal traffic monitoring
> techniques will *never* see protocol 114 unless by chance they are
> installed on a layer 2 segment where it is in use. So even if no traces
> anywhere include it for ten years, we still can't assert that it is out of
> use. It seems harder to prove than most negatives :-).
>
> > RFC6335 talks about the issue in trying to recover such entries.
> >
> > In general, it recommends that even if they are recovered, at best they
> would be marked as “RESERVED” until other values have been assigned and the
> space requires reuse of those dead entries.
> >
> > So the net effect is:
> > a) the list will never actually reflect what is deployed (as Bob notes
> below)
> > b) garbage-collecting will at best mark some subset as dead
> > c) but the available entries won’t be reused until we run out anyway
> >
> > Given the number of remaining entries, the task of garbage collection
> seems of little value.
>
> Until the day when it seems urgent...
>
>     Brian
>
> >
> > Joe
> >
> >> On Sep 20, 2019, at 1:31 PM, Bob Hinden <bob.hinden@gmail.com> wrote:
> >>
> >> Andy,
> >>
> >>> On Sep 20, 2019, at 10:37 AM, Andrew G. Malis <agmalis@gmail.com>
> wrote:
> >>>
> >>> Behcet,
> >>>
> >>> That was a historical list. The current assignments are in
> https://www.iana.org/assignments/protocol-numbers/protocol-numbers.xhtml
> . If you want to go garbage collecting, that's the place to start.
> >>
> >> It's difficult to tell which are no longer used.  For example, I was
> recently asked about the Reliable Data Protocol, it’s IANA assignment:
> >>
> >> 27   RDP     Reliable Data Protocol          [RFC908][Bob_Hinden]
> >>
> >> I assumed it was no longer used.   Later by happenstance, I learned it
> is specified by ETSI as mandatory to implement in eSIMs.  I had no idea.
> >>
> >> Bob
> >>
> >>
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> >
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> >
>
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