[alto] Lars Eggert's No Objection on draft-ietf-alto-cost-mode-03: (with COMMENT)

[Lars Eggert via Datatracker <[e-mail]>]

Lars Eggert has entered the following ballot position for
draft-ietf-alto-cost-mode-03: No Objection

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COMMENT:
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# GEN AD review of draft-ietf-alto-cost-mode-03

CC @larseggert

Thanks to Roni Even for the General Area Review Team (Gen-ART) review
(https://mailarchive.ietf.org/arch/msg/gen-art/xlaIzXHKY1NzjJRJpuXpzKwP4rc).

## Comments

### Section 1, paragraph 4
```
     Additional cost modes are required for specific ALTO deployment cases
     (e.g., [I-D.ietf-alto-path-vector]).  In order to allow for such use
     cases, this document relaxes the constraint imposed by the base ALTO
     specification on allowed cost modes (Section 3) and creates a new
     ALTO registry to track new cost modes (Section 4).
```
I second Rob's DISCUSS, i.e., it's not clear at all that current ALTO
implementations will handle this protocol parameter now taking on
values other than "numerical" or "ordinal" without explicit
negotiation.

I will let Rob hold the DISCUSS, but will monitor the discussion to
see if this issue will be addressed.

## Notes

This review is in the ["IETF Comments" Markdown format][ICMF], You can use the
[`ietf-comments` tool][ICT] to automatically convert this review into
individual GitHub issues. Review generated by the [`ietf-reviewtool`][IRT].

[ICMF]: https://github.com/mnot/ietf-comments/blob/main/format.md
[ICT]: https://github.com/mnot/ietf-comments
[IRT]: https://github.com/larseggert/ietf-reviewtool