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

Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Tue, 02 April 2019 12:15 UTC

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Date: Tue, 2 Apr 2019 14:15:50 +0200
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: tom petch <ietfc@btconnect.com>
CC: Jeff Tantsura <jefftant.ietf@gmail.com>, "netmod@ietf.org" <netmod@ietf.org>, Kristian Larsson <kristian@spritelink.net>
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References: <20190401161321.seiodlfsmjjvjcp5@anna.jacobs.jacobs-university.de> <F1537180-6BF3-40C7-BCFA-3AAE0290AE9D@cisco.com> <A0F7987F-AA67-4A63-8FEE-3B74B5B47CF1@cisco.com> <20190401.192951.1060904547331848297.mbj@tail-f.com> <073226E5-F7D4-455D-AC88-B3D13FF103DD@gmail.com> <e659034c-8e1a-0bd8-3c92-b622240f8eb7@spritelink.net> <7d368608-7c73-4287-bfa3-69a8db8576a2@Spark> <082d01d4e944$aae0e3a0$4001a8c0@gateway.2wire.net>
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Subject: Re: [netmod] 6991bis: address-with-prefix-length
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If you go back ~20 messages, my proposal was ip-address-prefix,
ipv4-address-prefix, and ipv6-address-prefix.

/js

On Tue, Apr 02, 2019 at 11:13:09AM +0000, tom petch wrote:
> ----- 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.
> >
> > _______________________________________________
> > netmod mailing list
> > netmod@ietf.org
> > https://www.ietf.org/mailman/listinfo/netmod
> 
> 
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Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
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