At Aviat we've been using deviations for this:
module aviat-ietf-interfaces-dev {
// ...
deviation "/if:interfaces/if:interface" {
deviate add {
must "if:type = 'ianaift:l2vlan' or if:type =
'ianaift:ethernetCsmacd'
or if:type = 'rl:radio-link-terminal' or if:type =
'rl:carrier-termination'
or if:type = 'ianaift:ieee8023adLag'";
}
}
}
________________________________________
From: netmod <netmod-boun...@ietf.org> on behalf of Vladimir Vassilev
<vladi...@transpacket.com>
Sent: Wednesday, 30 November 2016 11:05 p.m.
To: Jan Lindblad; netmod@ietf.org
Subject: Re: [netmod] How to prevent a client from modifying the type of an
interface?
On 11/29/2016 05:18 PM, Jan Lindblad wrote:
> Bart,
>
> Jürgen et al are of course right in what they say, but if you really
> want to use YANG to enable a manager to know a priori what values are
> possible for a particular leaf somewhere, that's easy too -- if you
> see the addition of a new proprietary YANG module as a possibility.
>
> module device-limitations {
> ...
> container limitations {
> must
> "not(/if:interfaces/if:interface[not(if:type='ianaift:fastdsl')])" {
> error-message "There must not be any interfaces that are not of
> fastdsl interface type";
> }
> }
> }
+1. We use the same approach for defining device specific limitations in
YANG.
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