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Re: [mpls] MPLS label and LSE data models

Jeffrey Haas <jhaas@pfrc.org> Mon, 10 July 2017 20:11 UTC

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Date: Mon, 10 Jul 2017 16:21:02 -0400
From: Jeffrey Haas <jhaas@pfrc.org>
To: Xufeng Liu <Xufeng_Liu@jabil.com>
Cc: Greg Mirsky <gregimirsky@gmail.com>, "draft-ietf-mpls-static-yang@ietf.org" <draft-ietf-mpls-static-yang@ietf.org>, "mpls@ietf.org" <mpls@ietf.org>, "draft-ietf-rtgwg-routing-types@ietf.org" <draft-ietf-rtgwg-routing-types@ietf.org>, "rtgwg@ietf.org" <rtgwg@ietf.org>
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Subject: Re: [mpls] MPLS label and LSE data models
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Xufeng,

I see that draft-ietf-mpls-static-yang-04 was issued.  My comment is against
that version now.

On Thu, Jun 22, 2017 at 03:44:28PM +0000, Xufeng Liu wrote:
> > I'm not conversant with common Yang tool suites, but it seems if the ordered-by
> > user rather than the default of system, then the tooling might present the
> > bottom of stack entry as the first or last node of the list rather than requiring the
> > consumer to have to run a sort of the nodes based on the id number and then
> > select the first node.
> 
> [Xufeng] Are you suggesting to use the position to order instead of the ID
> value? If so, what would be the semantics of the ID value? If we cannot
> get rid of the ID key, I don't know if using a separate ordering mechanism
> will make the usability better.

I see that you changed things to use a constrained index range with id 0
being special for top of stack.

So, if you have labels with indexes 0, 5, 10, 15, then 15 would be the
bottom of stack?

-- Jeff

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