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Re: [babel] info-model: preparing -09 on github

Juliusz Chroboczek <jch@irif.fr> Wed, 14 August 2019 17:25 UTC

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Date: Wed, 14 Aug 2019 19:25:37 +0200
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From: Juliusz Chroboczek <jch@irif.fr>
To: "STARK, BARBARA H" <bs7652@att.com>
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Subject: Re: [babel] info-model: preparing -09 on github
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Thanks, Barbara.

> http://tools.ietf.org//rfcdiff?url1=https://www.ietf.org/id/draft-ietf-babel-information-model-08.txt&url2=https://bhstark2.github.io/babel-information-model/draft-ietf-babel-information-model.txt

I didn't see anything wrong.  (Nit: "an implementation attempting to
comply", I suggest "that purports to comply".  It sounds, like, really smart.)

> 1. link properties / metric-comp-algorithm / interface-metric-algorithm
> / split-horizon: I'm leaning away from any new objects for link property
> grouping.

I agree, pending further input.

> 2. babel-mac-key-value description to constrain it according to the
> babel-mac-key-algorithm allowed key length

Here's my current proposal (pending further input):

  This value is of a length suitable for the associated
  babel-mac-key-algorithm.  If algorithm is based on the HMAC
  construction, this value MUST be between 0 and the block size of the
  underlying hash inclusive (64 in the case of HMAC-SHA-256); if it is
  smaller, it is zero-extended before use as specified in Section 2 of RFC
  2104.  If the algorithm is Blake2s, then it MUST be between 0 and 32
  inclusive, and is used as described in Section 3.3 of RFC 7693.

-- Juliusz

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