Re: [Gen-art] Gen-ART review of draft-ietf-isis-rfc6326bis-01

[Donald Eastlake <[e-mail]>]

Hi Alexey,

Thanks for your review, see below:

On Mon, Jan 20, 2014 at 6:12 AM, Alexey Melnikov
<[e-mail]> wrote:
> I am the assigned Gen-ART reviewer for this draft. For background on
> Gen-ART, please see the FAQ at
> <http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq>.
>
> Please resolve these comments along with any other Last Call
> comments you may receive.
>
> Document: draft-ietf-isis-rfc6326bis-01
> Reviewer: Alexey Melnikov
> Review Date: 2014-01-20
> IETF LC End Date: 2014-01-22
> IESG Telechat date: 2014-01-23
>
>
> Summary: This draft is nearly ready for publication as a standard track RFC.
>
> Major issues: None
>
> Minor issues:
>
> o  Label: This carries the fine-grained label identifier for all
>       subsequent MAC addresses in this sub-TLV, or the value zero if no
>       label is specified.
>
> I fully admit ignorance of the topic, but what is exactly
> "fine-grained label" and where is the exact format defined? If it is
> defined later in the document, can you please add a forward
> reference. If it is defined in another document, can you please add
> a reference to that.

Fine grained labels are specified in draft-ietf-trill-fine-labeling-07,
which is an approved standard track draft in the RFC Editor's
queue. Adding a reference to it here would be good.

> In Sections 2.2.4 and 2.3.1:
>
> What are the requirements on backward compatibility between different
> versions of TRILL. Are TLVs formats supported for a version N also valid for
> version N+M? If you have any implied assumptions, please state them in the
> document.

There are no explicit requirements. Incremental changes and
improvements are generally handed with capability bits or the
presence/absence of data strucutres in control messages. A version
change would probably indicate a pretty major modification but, since
these version numbers are within IS-IS TLVs, I would say that
implicitly the intent is to stay with the IS-IS PDU structure for the
control plane.

Thanks,
Donald
=============================
 Donald E. Eastlake 3rd   [phone] (cell)
 155 Beaver Street, Milford, MA 01757 USA
 [e-mail]

> Nits/editorial comments: None