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Re: [babel] [Babel-users] MAC rekeying in babeld and information model

Juliusz Chroboczek <jch@irif.fr> Sun, 19 January 2020 13:14 UTC

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Date: Sun, 19 Jan 2020 14:14:29 +0100
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From: Juliusz Chroboczek <jch@irif.fr>
To: "STARK, BARBARA H" <bs7652@att.com>
Cc: 'Toke Høiland-Jørgensen' <toke@toke.dk>, "'babel-users@lists.alioth.debian.org'" <babel-users@lists.alioth.debian.org>, "'babel@ietf.org'" <babel@ietf.org>
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Subject: Re: [babel] [Babel-users] MAC rekeying in babeld and information model
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> Since that revision has Boolean (true/false) parameters of
> babel-key-use-sign and babel-key-use-verify (but not key-use with values
> of sign/verify/both), I did want to be sure we were talking about the
> right model revision.

The second part of my inquiry -- how does the information model enable
incremental deployment?  Section 5 of draft-ietf-babel-mac.

Toke, it would be helpful if we could understand what key-use is intended
for.  My personal opinion right now is that we should:

  - remove key-use from the draft;

  - add a per-interface configuration "allow-unauthentified", which, if set,
    causes all packets received on that interface to be accepted, whether
    signed, unsigned, or incorrectly signed.

Incremental deployment is an important feature, and I think that we need
to make really sure that the information model allows it.

-- Juliusz

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