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Re: [Idr] [GROW] draft-snijders-idr-shutdown-00: Drop a line in the peer's syslog at shutdown

Job Snijders <job@instituut.net> Fri, 18 November 2016 08:46 UTC

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From: Job Snijders <job@instituut.net>
Date: Fri, 18 Nov 2016 08:45:56 +0000
Message-ID: <CACWOCC8ENYuX2LeJKWP0tmMoCPJ4J-qxJjOXiHHLaP8Fqe4USg@mail.gmail.com>
To: bruno.decraene@orange.com
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Cc: "idr@ietf.org" <idr@ietf.org>, "grow@ietf.org" <grow@ietf.org>
Subject: Re: [Idr] [GROW] draft-snijders-idr-shutdown-00: Drop a line in the peer's syslog at shutdown
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Hi Bruno,

John Scudder was kind enough to provide extensive argumentation offlist on
why something along these lines should be done. We'll work on a proposal.
The length indicator is a neat idea, thanks for sharing.

Job

On Fri, 18 Nov 2016 at 17:32, <bruno.decraene@orange.com> wrote:

>
>
> > From: Job Snijders [mailto:job@instituut.net]  > Sent: Friday, November
> 18, 2016 1:46 AM
> >
>  > On Thu, Nov 17, 2016 at 04:28:50PM +0000, bruno.decraene@orange.com
> wrote:
>  > > I support the draft.
>  > > I also support Jeff's idea to re-use existing sub-code(s).
>  >
>  > Thanks for your support. Based on the feedback received so far the next
>  > version of this draft will recycle Cease subcode 2.
>  >
>  > > 1 possible comment: the length of the "Shutdown Communication" field
>  > > seems implied from the length of the data field, rather than being
>  > > explicitly indicated.
>  >
>  > The text is explicit about the length:
>  >
>  >     "followed by a freeform UTF-8 encoded string with a REQUIRED maximum
>  >     length of 128 octets. "
>  >
>  > and further:
>  >
>  >     "This document tries to minimize the effects of visual spoofing by
>  >     allowing UNICODE only where local script is expected and needed, and
>  >     by limiting the length of the Shutdown Communication."
>  >
>  > > If so, it seems that we are closing the possibility to advertise
>  > > additional data/usage, in some future. What about adding a TLV format?
>  >
>  > I object to using a TLV. Don't forget this is already at a TLV level:
>  > Cease NOTIFICATION. If one would want to define a TLV inside this TLV, a
>  > new Cease subcode can be requested from IANA.
>
> What if someone needs to advertise additional info to an existing cease
> subcode? cf Jeff's email regarding the pain of changing subcodes.
> So let's forget about the TLV. What about just adding the length of the
> string? This would still allow adding fields after the string, while having
> a negligible/null cost?
>
> Kind regards,
> -- Bruno
>
>  > Kind regards,
>  >
>  > Job
>
>
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