Re: [PWE3] Last Call: 'IANA Allocations for pseudo Wire Edge to Edge Emulation (PWE3)' to BCP

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The IESG wrote:

The IESG has received a request from the Pseudo Wire Emulation Edge to Edge WG
to consider the following document:

- 'IANA Allocations for pseudo Wire Edge to Edge Emulation (PWE3) '
   <draft-ietf-pwe3-iana-allocation-12.txt> as a BCP


This draft reserves a number of ranges not be allocated by IANA,
for example in Pseudowire type (2.1. Pseudowire Type) it says:

"PW Type values 1025 through 4096, and 32768 are reserved for future
use, and are not to be allocated by IANA." (32768 was a typo and
should have been 32767).

It has been suggested that we should change this to:

"PW Type values 1025 through 4096, and 32767 are allocated through
the IETF Consensus Process"

Similarly for other ranges in the draft in which similar "not to
be allocated by IANA" text is used.

The rational is as follows. There is no TECHNICAL reason not
to use these values - they do not for example clash with other
protocols - the PWE3 WG was simply reserving them for the future
with a significant barrier to their allocation.

With the existing text, if we did ever need them we would need
to issue an instruction to IANA to release them, but would also
have to check that no one had done anything on the basis that
they were not to be issued by IANA.

By making them available through the IETF Consensus Process,
we retain them as a range that we can use in the future,
but set a barrier to use, such that they will be issued only if
the IETF considers the proposed use to be valid.

I believe that the proposed change executes the intent of the
PWE3 WG, but is administratively simpler.

- Stewart

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