> On 30 Jul 2015, at 01:12, Andy Bierman <a...@yumaworks.com> wrote:
> 
> 
> 
> On Wed, Jul 29, 2015 at 10:51 AM, Martin Bjorklund <m...@tail-f.com> wrote:
> Andy Bierman <a...@yumaworks.com> wrote:
> > Hi,
> >
> > I understand the intent is that an implementation of NACM
> > has to understand these NACM extensions.  I agree with Lada
> > that the YANG text about MAY ignore extensions casts doubt whether
> > this sort of NACM rule is enforceable or specified correctly.
> 
> So do you agree that it would be a good idea to clarify this
> according to Juergen's suggestion?
> 
> 
> 
> Not really.
> Pretending the extension is just another description-stmt
> does not really fix anything.

In fact, generic tools like pyang ignore what’s written in descriptions.

Lada

> 
> A real YANG statement like config-stmt or a new statement
> called ephemeral-stmt can be modified with refine-stmt
> or deviate-stmt.   This can never happen for
> an external statement.
> 
> 
> IMO ephemeral data support needs to be a real statement
> that can be used with refine-stmt and  deviate-stmt.
> It is a real property of a data node.
> 
> 
> /martin
> 
> 
> 
>  Andy
> 
> 
> 
> >
> >
> > Andy
> >
> >
> > On Wed, Jul 29, 2015 at 10:44 AM, Martin Bjorklund <m...@tail-f.com> wrote:
> >
> > > Andy Bierman <a...@yumaworks.com> wrote:
> > > > The real difference is that extensions can be ignored by all
> > > > YANG tools and real statements cannot be ignored.
> > >
> > > Are you saying that a server that advertises both ietf-system and nacm
> > > is free to ignore the nacm statements in ietf-system, and for example
> > > by default provide read-access to
> > > /system/radius/server/udp/shared-secret?
> > >
> > >
> > > /martin
> > >
> 

--
Ladislav Lhotka, CZ.NIC Labs
PGP Key ID: E74E8C0C




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