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Re: [Idr] [BULK] Benjamin Kaduk's Discuss on draft-ietf-idr-flow-spec-v6-19: (with DISCUSS and COMMENT)

John Scudder <jgs@juniper.net> Mon, 16 November 2020 20:17 UTC

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From: John Scudder <jgs@juniper.net>
To: Jeffrey Haas <jhaas@pfrc.org>
CC: Christoph Loibl <c@tix.at>, Benjamin Kaduk <kaduk@mit.edu>, "idr@ietf. org" <idr@ietf.org>, "draft-ietf-idr-flow-spec-v6@ietf.org" <draft-ietf-idr-flow-spec-v6@ietf.org>, Robert Raszuk <robert@raszuk.net>, "idr-chairs@ietf.org" <idr-chairs@ietf.org>, The IESG <iesg@ietf.org>, Erik Kline <ek.ietf@gmail.com>
Thread-Topic: [BULK] [Idr] Benjamin Kaduk's Discuss on draft-ietf-idr-flow-spec-v6-19: (with DISCUSS and COMMENT)
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Date: Mon, 16 Nov 2020 20:17:28 +0000
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Subject: Re: [Idr] [BULK] Benjamin Kaduk's Discuss on draft-ietf-idr-flow-spec-v6-19: (with DISCUSS and COMMENT)
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Hi All,

> On Nov 16, 2020, at 4:42 AM, Jeffrey Haas <jhaas@pfrc.org> wrote:
> 
> [External Email. Be cautious of content]
> 
> 
> On Mon, Nov 16, 2020 at 10:12:18AM +0100, Christoph Loibl wrote:
>> While I (personally) would prefer something like Juniper’s implementation. rfc5575bis's consensus was the approach that we suggest an encoding length for each FS component. The current approach in flow-spec-v6 does not break this concept and is consistent also with the base FS document. As Jeffrey mentioned it is also compatible with the “use as less bits as possible” encoding approach. Thanks for the comment Jeffrey.
> 
> Remind me, is there procedure handling improper values for the length of the
> component semantics?
> 
> E.g. ports can only be 2 bytes of value.
> 
> I have a feeling this is in the base procedures of "this can't match, so
> it's not a problem" but I'm not finding it right now.

FYI I’ve started a discussion with the 5575bis authors just to be sure there isn’t some text we need to tighten up there, since it’s not published yet.

Thanks,

—John

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