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Re: [netmod] 6991bis: address-with-prefix-length

tom petch <ietfc@btconnect.com> Tue, 02 April 2019 11:13 UTC

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From: tom petch <ietfc@btconnect.com>
To: Jeff Tantsura <jefftant.ietf@gmail.com>, "netmod@ietf.org" <netmod@ietf.org>, Kristian Larsson <kristian@spritelink.net>
Thread-Topic: [netmod] 6991bis: address-with-prefix-length
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Date: Tue, 02 Apr 2019 11:13:09 +0000
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Subject: Re: [netmod] 6991bis: address-with-prefix-length
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----- Original Message -----
From: "Jeff Tantsura" <jefftant.ietf@gmail.com>
To: <netmod@ietf.org>; "Kristian Larsson" <kristian@spritelink.net>
Sent: Monday, April 01, 2019 11:09 PM

What Kristian has proposed makes sense, in favor.

<tp>

Yes, I support this idea and we should be able to come up with a more
user-friendly name;  address-prefix or address-length ?

Tom Petch

p.s.

   identifier          = (ALPHA / "_")
                         *(ALPHA / DIGIT / "_" / "-" / ".")

Cheers,
Jeff
On Apr 1, 2019, 1:09 PM -0700, Kristian Larsson
<kristian@spritelink.net>, wrote:
> Hello Mahesh,
>
> On 2019-04-01 21:40, Mahesh Jethanandani wrote:
> >
> > > On Apr 1, 2019, at 10:29 AM, Martin Bjorklund <mbj@tail-f.com>
wrote:
> > >
> > > I know that this type is convenient, esp. if you use it for manual
> > > input, but I wonder if it really is good practice to squeeze two
> > > values into one.
> >
> > Agree. The combination makes sense for CLI, but for modeling the
address and prefix should be separate.
>
> Okay, then why do we have an ip-prefix data type at all? With the same
> line of argument you apply, it should be split up.
>
> So you're the third person bringing up CLI. I don't get this at all. I
> don't see how CLI are different from everything else. This is about
data
> modeling and data modeling is about expressing the world in a data
> modeling language. It's like painting a picture but instead of a brush
> you have a schema language like YANG. What do you see? Express it. It
> doesn't matter if the purpose is a CLI, a web page or just exposing it
> via NETCONF for another system to consume.
>
> I think address-and-prefix-length is natural. JUNOS uses this format.
XR
> uses this format (for IPv6 at least). Nokia SROS uses this format.
>
> We have written a bunch of models where the lack of this IMHO makes
them
> less elegant. I'd like for there to be an IETF standard data type to
> make those models more elegant.
>
> Kind regards,
> Kristian.
>
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> netmod@ietf.org
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