Re: [netmod] rfc7223bis (interfaces) enabled leaf vs SNMP admin-state

["Sterne, Jason (Nokia - CA/Ottawa)" <[e-mail]>]

Hi Martin,

I'm OK with that direction ('enabled' affects ifAdminStatus).  I'm questioning the other direction.  I think a change in ifAdminStatus should be reflected in 'enabled'.

Rgds,
Jason

> -----Original Message-----
> From: Martin Bjorklund [mailto:[e-mail]]
> Sent: Thursday, October 26, 2017 14:51
> To: Sterne, Jason (Nokia - CA/Ottawa) <[e-mail]>
> Cc: [e-mail]
> Subject: Re: [netmod] rfc7223bis (interfaces) enabled leaf vs SNMP admin-
> state
> 
> "Sterne, Jason (Nokia - CA/Ottawa)" <[e-mail]> wrote:
> > Hi all,
> >
> > The issue I'm raising isn't new to the 'bis' version of RFC7223, but
> > I'm questioning whether we should consider changing something about it
> > while we're in there.
> >
> > The 'enabled' leaf has this in the description:
> >
> >              Changes in this leaf in the intended configuration are
> >              reflected in ifAdminStatus, but if ifAdminStatus is
> >              changed over SNMP, this leaf is not affected.
> >
> > As an example of "working code", Nokia's SR OS has supported full
> > router configuration via SNMP for many years.  When someone enables an
> > interface via CLI, that is reflected in ifAdminStatus and vice-versa.
> > i.e. configuration via two different interfaces (SNMP & CLI) that use
> > different data models, map rw leafs from the two interfaces/models to
> > the same underlying internal object.
> >
> > In general, many SNMP rw objects will map to the same underlying
> > internal rw object as the equivalent rw leaf in a YANG model (for
> > products that actually support config management via SNMP as well as
> > NETCONF).  Changing the leaf/object via SNMP affects the equivalent
> > leaf/object in NETCONF.  Why make this one a special case ?
> 
> Note how ifAdminStatus is defined:
> 
>             "The desired state of the interface.  The testing(3) state
>             indicates that no operational packets can be passed.  When a
>             managed system initializes, all interfaces start with
>             ifAdminStatus in the down(2) state.  As a result of either
>             explicit management action or per configuration information
>             retained by the managed system, ifAdminStatus is then
>             changed to either the up(1) or testing(3) states (or remains
>             in the down(2) state)."
> 
> Note the *per configuration information*.  It is clear that ifAdminStatus is not
> the same as the "per configuration information".
> The config object can affect ifAdminStatus.  "enabled" in the YANG model is
> supposed to be that config object that can affect ifAdminStatus.
> 
> 
> 
> /martin
> 
> 
> >
> > I'd propose that we remove that sentence.
> >
> > Rgds,
> > Jason
> >
> > > -----Original Message-----
> > > From: netmod [mailto:[e-mail]] On Behalf Of internet-
> > > [e-mail]
> > > Sent: Monday, October 16, 2017 9:25
> > > To: [e-mail]
> > > Cc: [e-mail]
> > > Subject: [netmod] I-D Action: draft-ietf-netmod-rfc7223bis-00.txt
> > >
> > >
> > > A New Internet-Draft is available from the on-line Internet-Drafts
> > > directories.
> > > This draft is a work item of the Network Modeling WG of the IETF.
> > >
> > >         Title           : A YANG Data Model for Interface Management
> > >         Author          : Martin Bjorklund
> > > 	Filename        : draft-ietf-netmod-rfc7223bis-00.txt
> > > 	Pages           : 47
> > > 	Date            : 2017-10-15
> > >
> > > Abstract:
> > >    This document defines a YANG data model for the management of
> network
> > >    interfaces.  It is expected that interface-type-specific data models
> > >    augment the generic interfaces data model defined in this document.
> > >    The data model includes definitions for configuration and system
> > >    state (status information and counters for the collection of
> > >    statistics).  This document obsoletes RFC 7223.
> > >
> > >
> > > The IETF datatracker status page for this draft is:
> > > https://datatracker.ietf.org/doc/draft-ietf-netmod-rfc7223bis/
> > >
> > > There are also htmlized versions available at:
> > > https://tools.ietf.org/html/draft-ietf-netmod-rfc7223bis-00
> > > https://datatracker.ietf.org/doc/html/draft-ietf-netmod-rfc7223bis-0
> > > 0
> > >
> > >
> > > Please note that it may take a couple of minutes from the time of
> > > submission until the htmlized version and diff are available at
> > > tools.ietf.org.
> > >
> > > Internet-Drafts are also available by anonymous FTP at:
> > > ftp://ftp.ietf.org/internet-drafts/
> > >
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