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Re: [babel] info-model: link properties

"STARK, BARBARA H" <bs7652@att.com> Wed, 10 July 2019 18:12 UTC

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From: "STARK, BARBARA H" <bs7652@att.com>
To: 'Juliusz Chroboczek' <jch@irif.fr>
CC: 'Babel at IETF' <babel@ietf.org>
Thread-Topic: [babel] info-model: link properties
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Date: Wed, 10 Jul 2019 18:12:36 +0000
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Subject: Re: [babel] info-model: link properties
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> I was under the impression that we had decided that the classification of link
> types in wired/wireless/tunnel is an internal implementation detail of
> babeld, and that what we wanted to export were the underlying properties,
> which are:
> 
>   - link cost estimator (ETX or 2-out-of-3);
>   - use split-horizon (boolean);
>   - use RTT (boolean).
> 
> wired means 2-out-of-3, split-horizon, no RTT.
> wireless means ETX, no split-horizon, no RTT.
> tunnel means 2-out-of-3, split-horizon, RTT.
> 
> It is clear to me that the interface type abstration is useful for the user, who
> doesn't want to deal with technical details such as whether the split-horizon
> optimisation is allowable on a given link type, but it's difficult to export from
> the management interface.

I recently posted an update to the information-model draft, but missed including the appropriate updates to the Link Properties registry descriptions in IANA considerations. What I intend to do in the next revision is use Juliusz' proposed descriptions (above) for wired, wireless, and tunnel. What should I put for "other"?  Or should I have an "other"? 
Barbara

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