Re: [Idr] I-D Action: draft-ietf-idr-shutdown-01.txt

"Jakob Heitz (jheitz)" <jheitz@cisco.com> Wed, 30 November 2016 21:56 UTC

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From: "Jakob Heitz (jheitz)" <jheitz@cisco.com>
To: "John G. Scudder" <jgs@juniper.net>
Thread-Topic: [Idr] I-D Action: draft-ietf-idr-shutdown-01.txt
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Date: Wed, 30 Nov 2016 21:56:16 +0000
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References: <148052490104.3081.2049626653192295584.idtracker@ietfa.amsl.com> <20161130204903.GH10210@Vurt.local> <CC754B0F-B1FE-4C27-B39A-89BF58313CE9@pfrc.org> <828EC50E-0659-46F1-90E2-BD883A75A706@juniper.net> <8FCE845A-5DB6-4630-9F68-949C4B8D3D8F@pfrc.org> <b98866b0eac34bd4a2c7942334bdba90@XCH-ALN-014.cisco.com> <D96D2E63-F747-4096-B4A7-F67758112A50@juniper.net>
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Subject: Re: [Idr] I-D Action: draft-ietf-idr-shutdown-01.txt
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I also agree with Jeff not to object and not to push for it.

Thanks,
Jakob.


> -----Original Message-----
> From: John G. Scudder [mailto:jgs@juniper.net]
> Sent: Wednesday, November 30, 2016 1:52 PM
> To: Jakob Heitz (jheitz) <jheitz@cisco.com>
> Cc: Jeffrey Haas <jhaas@pfrc.org>rg>; idr@ietf.org
> Subject: Re: [Idr] I-D Action: draft-ietf-idr-shutdown-01.txt
> 
> On Nov 30, 2016, at 4:34 PM, Jakob Heitz (jheitz) <jheitz@cisco.com> wrote:
> > I agree with Jeff.
> > The potential to add future stuff to this field is quite limited,
> > given that the field already exists and may have been used for other
> > purposes. A text field is about as much as you could get away with
> > under those circumstances. Please don't anyone say CRC.
> 
> SHA-3 HMAC, duh. :-)
> 
> What I dislike about leaving the string length out is that you're still going to have to police the overall data
> length to make sure it doesn't exceed 127 and decide what to do with any trailing data if it does. In effect, you've
> bitten off an implicit length field anyway by accepting the length restriction. Whether or not you think further
> extensibility matters is almost beside the point, but if it's available for "free" then I don't see a downside.
> 
> If the string's length were not limited to 127 then it would be a different story, but Job has made a principled
> argument for restricting the length.
> 
> --John