Re: [netmod] Quirky YANG

[tom petch <[e-mail]>]

----- Original Message -----
From: "Juergen Schoenwaelder" <[e-mail]>
Sent: Wednesday, October 03, 2018 5:43 PM

> Well, make sure you send your comments to softwire since they have to
> sort this out.

Indeed.

The subtext to my query was that if this had had aYANG doctor review,
which I assumed it would have had by now, then there was something I was
misunderstanding about YANG identities and features, but perhaps it is
my understanding of when YANG doctor reviews take place that I was
missing:-)

Tom Petch




>
> /js
>
> On Wed, Oct 03, 2018 at 04:11:13PM +0000, tom petch wrote:
> > I wonder if anyone else on this list has looked at
> >  https://datatracker.ietf.org/doc/draft-ietf-softwire-yang/
> > currently in IETF Last Call.
> >
> > It provides management for three tunnel types, Lw4o6, MAP-E and
MAP-T
> > betweeen CPE and Border Relay.  It defines a CPE module, a BR module
and
> > a module of common definitions.
> >
> > It does not provide identities for the three tunnel types; rather,
where
> > it augments "/if:interfaces/if:interface" it specifies
> >     when "if:type = 'ianaift:tunnel'";
> > which to me says that a MAP-E (e.g.) specific object will get added
to
> > each and every tunnel of whatever type, which seems excessive.
> >
> > Second, it defines four features, softwire-ce:algorithm (i.e.
> > MAP-E/MAP-T) and softwire-ce:binding (i.e. Lw4o6) in the CPE module
and
> > then again softwire-br:algorithm and softwire-br:binding in the BR
> > module.  It is unclear to me, from the I-D, whether support is for
MAP-T
> > and MAP-E; or either MAP-T or MAP-E - I find the I-D ambiguous on
that
> > point - but I would have expected there to be either two - Lw4o6 and
> > MAP-ET - or three - Lw4o6, MAP-E and MAP-T features, not four; and
for
> > the features to be defined, along with tunnel identities, in the
common
> > module.
> >
> > Odd, IMHO.
> >
> > Tom Petch
> >
> > _______________________________________________
> > netmod mailing list
> > [e-mail]
> > https://www.ietf.org/mailman/listinfo/netmod
>
> --
> Juergen Schoenwaelder           Jacobs University Bremen gGmbH
> Phone: [phone]         Campus Ring 1 | 28759 Bremen | Germany
> Fax:   [phone]         <https://www.jacobs-university.de/>