From: Alvaro Retana <aretana.ietf@gmail.com>
In-Reply-To: <158858523391.15266.770083759718373527@ietfa.amsl.com>
References: <158858523391.15266.770083759718373527@ietfa.amsl.com>
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Date: Mon, 4 May 2020 03:39:10 -0700
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To: Robert Wilton via Datatracker <noreply@ietf.org>, The IESG <iesg@ietf.org>,
 Robert Wilton <rwilton@cisco.com>
Cc: Susan Hares <shares@ndzh.com>, idr-chairs@ietf.org, jgs@juniper.net,
 idr@ietf.org, draft-ietf-idr-capabilities-registry-change@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/oT5KjP5KxnHVIixgYwqSxKqZcHE>
Subject: Re: [Idr] Robert Wilton's No Objection on
 draft-ietf-idr-capabilities-registry-change-08: (with COMMENT)
Precedence: list

On May 4, 2020 at 5:40:34 AM, Robert Wilton wrote:


Rob:

Hi!


> ----------------------------------------------------------------------
> COMMENT:
> ----------------------------------------------------------------------
>
> This document is straight forward and easy to read and understand. I had =
one
> minor comment.
>
> [RFC5492] designates the range of Capability Codes 128-255 as
> "Reserved for Private Use". Subsequent experience has shown this to
> be not only useless, but actively confusing to implementors.
>
> It might possibly be helpful to expand this paragraph slightly.
>
> Because what was once "Reserved for Private Use" is now being reclassifie=
d
> to something non private, I presume that there are no BGP implementations
> using these capability codes that could be broken by this reclassificatio=
n.
> Hence, on the assumption that these codes are not in fact being used for
> private use, it might be helpful to state that in order to help justify w=
hy
> it is okay to make this change.

There *are* implementations using the code points on that range. =C2=A0The
WG has carefully surveyed implementations and is deprecating the known
values (Table 2).


Thanks!

Alvaro.