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

["Rob Wilton (rwilton)" <[e-mail]>]

> -----Original Message-----
> From: netmod <[e-mail]> On Behalf Of Martin Bjorklund
> Sent: 01 April 2019 18:30
> To: Acee Lindem (acee) <[e-mail]>
> Cc: [e-mail]
> Subject: Re: [netmod] 6991bis: address-with-prefix-length
> 
> Hi,
> 
> The request was for a combined type that contains both an ip address
> *and* a prefix length in one value.  Hence the name "ip-address-and-prefix-
> length" :)
> 
> 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.

Perhaps allowing YANG to support a tuple type would be an elegant solution.  I.e. the value exists on a single path, and has to be atomically updated, but the value can still be composed from different types.

Thanks,
Rob


> 
> 
> /martin
> 
> 
> "Acee Lindem (acee)" <[e-mail]> wrote:
> > Ok, now I'm confused. I see that the ietf-inet-type model already has the
> types ipv4-prefix and ipv6-prefix. How are these any different???
> > Thanks,
> > Acee
> >
> > On 4/1/19, 12:31 PM, "Acee Lindem (acee)" <[e-mail]> wrote:
> >
> >     I believe the "address-" could be omitted from the type identifiers. At
> least within the routing area, "ipv4-prefix" is unambiguous.
> >     Thanks,
> >     Acee
> >
> >     On 4/1/19, 12:14 PM, "netmod on behalf of Juergen Schoenwaelder"
> <[e-mail] on behalf of j.schoenwaelder@jacobs-
> university.de> wrote:
> >
> >         This is the right time for this and I would call these
> >         ip-address-prefix, ipv4-address-prefix and ipv6-address
> >         prefix.
> >
> >         /js
> >
> >         On Mon, Apr 01, 2019 at 04:38:34PM +0200, Kristian Larsson wrote:
> >         > Hello,
> >         >
> >         > seeing that 6991 is up for a refresh I wonder if this would be the time
> to
> >         > suggest the addition of a type for address-and-prefix-length, for
> example
> >         > like 192.0.2.1/24?
> >         >
> >         > I find that it's the most natural way express the address and prefix-
> length
> >         > to configure on an interface or for some other use. We currently
> have an
> >         > ip-prefix type which allows CIDR style prefixes but since all bits to the
> >         > right of the mask is to be 0 it is only possible to use for describing the
> >         > IP prefix / network address itself - not the address of a host in that
> >         > network.
> >         >
> >         > I actually wish the interface-ip modules would have used a combined
> leaf for
> >         > these settings rather than the dual-leaf approach it currently has, but
> I
> >         > suppose that ship has sailed :/
> >         >
> >         > Regardless, can we add such a type? Is this the document and time to
> do it?
> >         > :)
> >         >
> >         > Kind regard,
> >         >    Kristian.
> >         >
> >         > _______________________________________________
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> >         > 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/>
> >
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