Re: [Idr] Robert Wilton's No Objection on draft-ietf-idr-capabilities-registry-change-08: (with COMMENT)

John Scudder <jgs@juniper.net> Mon, 04 May 2020 15:41 UTC

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From: John Scudder <jgs@juniper.net>
To: "Rob Wilton (rwilton)" <rwilton@cisco.com>
CC: Alvaro Retana <aretana.ietf@gmail.com>, Robert Wilton via Datatracker <noreply@ietf.org>, The IESG <iesg@ietf.org>, Hares Susan <shares@ndzh.com>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, "idr@ietf.org" <idr@ietf.org>, "draft-ietf-idr-capabilities-registry-change@ietf.org" <draft-ietf-idr-capabilities-registry-change@ietf.org>
Thread-Topic: Robert Wilton's No Objection on draft-ietf-idr-capabilities-registry-change-08: (with COMMENT)
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Date: Mon, 4 May 2020 15:40:30 +0000
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Subject: Re: [Idr] Robert Wilton's No Objection on draft-ietf-idr-capabilities-registry-change-08: (with COMMENT)
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I have no objection to re-adding a few sentences to that effect.

—John

On May 4, 2020, at 6:51 AM, Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>> wrote:

[External Email. Be cautious of content]


Hi Alvaro,

-----Original Message-----
From: Alvaro Retana <aretana.ietf@gmail.com<mailto:aretana.ietf@gmail.com>>
Sent: 04 May 2020 11:39
To: Robert Wilton via Datatracker <noreply@ietf.org<mailto:noreply@ietf.org>>; The IESG
<iesg@ietf.org<mailto:iesg@ietf.org>>; Rob Wilton (rwilton) <rwilton@cisco.com<mailto:rwilton@cisco.com>>
Cc: Susan Hares <shares@ndzh.com<mailto:shares@ndzh.com>>; idr-chairs@ietf.org<mailto:idr-chairs@ietf.org>; jgs@juniper.net<mailto:jgs@juniper.net>;
idr@ietf.org<mailto:idr@ietf.org>; draft-ietf-idr-capabilities-registry-change@ietf.org<mailto:draft-ietf-idr-capabilities-registry-change@ietf.org>
Subject: Re: Robert Wilton's No Objection on draft-ietf-idr-capabilities-
registry-change-08: (with COMMENT)

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
reclassified
to something non private, I presume that there are no BGP
implementations
using these capability codes that could be broken by this
reclassification.
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
why
it is okay to make this change.

There *are* implementations using the code points on that range.  The
WG has carefully surveyed implementations and is deprecating the known
values (Table 2).

Okay.  I think that it might be helpful for the document to state this, both for readers who do not have that background, or in future when that knowledge has been forgotten.

Regards,
Rob




Thanks!

Alvaro.